Dissertations / Theses: 'Socket preservation'

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Pellegrini, G. "ALVEOLAR SOCKET PRESERVATION TECHNIQUE: HISTOLOGICAL HEALING OF HARD AND SOFT TISSUES." Doctoral thesis, Università degli Studi di Milano, 2012. http://hdl.handle.net/2434/173987.

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INTRODUCTION After tooth extraction, the use of grafting materials and absorbable membrane, alone or in association, were proposed for maintenance procedures of alveolar ridge volume. The preservation of bone volume in posterior maxillary area might be necessary to optimize the delayed implant placement without sinus augmentation procedure. In addition, importance of peri-implant soft tissue has been related to final aesthetic outcomes. The alveolar socket preservation technique may affect the healing of the overhanging mucosa. This research is composed by two studies (A and B). Aim of the study A was to evaluate histologically the integration and remodelling of porous bovine bone particles (PBBM) grafted in the extraction socket, and to compare the dimensional alterations of the alveolar ridge in the molar maxillary area after extraction with or without the graft of PBBM particles, at medium and advanced endpoints. Aim of the study B was to histologically compare soft tissue features of augmented alveolar sockets covered or not covered with collagen membrane. Methods Study A: This is a randomized double-blind controlled clinical trial. Sixteen patients who needed the extraction of one maxillary molar tooth were included in the study. After extraction seven sites were treated with PBBM particles (Bio-Oss Collagen) covered with collagen membrane (test), and nine sites were left untreated as control. At baseline, 3 and 6 months the alveolar ridge dimension changes were evaluated using an acrylic resin stent. At 3, 6 and 9 months one tissue sample was harvested in three selected patients and processed for histological analysis. At 9 months the authors also decided for implant placement with or without previous sinus floor augmentation. Study B. This is a randomized double-blind controlled split-mouth clinical trial. Twelve patients requiring extraction of 2 controlateral maxillary premolar teeth were included. Following extractions in each patient, one randomly selected site was augmented with graft material (Bio-Oss Collagen, Geistlich) (control group), the other site was augmented and covered with collagen membrane (Bio-Gide, Geistlich) (test group). Following 5 weeks (early endopint, n=7 patients) or 12 weeks (late endpoint, n=5 patients) samples of newly-formed soft tissue were harvested and processed for evaluation of micro vascular density (MVD) (immunohistochemistry with CD31), collagen content (AA%) and amount of inflammatory infiltrate (immunohistochemistry with CD3 for T-lymphocytes and CD20 for B-lymphocytes). Non-parametric statistical analyses were performed to compare data from test and control groups at early and late endpoint. Data from the same group were also compared between early and late endpoints. Pearson’s correlation was used to compare intra-patient data. RESULTS: Study A. Data on alveolar ridge volume changes did not show significant differences between test and control group. However in the control group sites that maintained the buccal bone showed a substantial loss of buccal bone compared to the test group. At 3 months histological evaluation grafting material was detected immersed in highly cellular connective tissue. At 6 and 9 months grafting material was mainly remodeled and remaining particles were in contact with newly formed lamellar bone. The odds ratio for receiving the sinus augmentation before implant placement resulted 2.25 times greater in control group than in test group (p=0.39). Study B. At 5 weeks after extraction, in both groups, epithelial and connective tissues appeared normally organized, without increased inflammatory infiltrate or cellular morphological alterations. Connective tissue of both groups presented remaining graft particles surrounded by mature collagen fibres. At 12 weeks a more mature structure of the epithelium and connective tissue was detected. No graft particles were observed. At 5 weeks the vascularization of tissue in samples sites treated with the graft+ resorbable membrane was significantly lower (MVD= 6.18) than in samples harvested from sites treated only with the filling material (MVD= 9.44) (Wilcoxon Matched Pair-Signed Rank, p<0.05). At this endpoint, data on Lymphocytes T and B, and collagen content showed no significant differences between test and control group. At 12 weeks no significant differences between test and control group were found for any of the considered parameter. Data on MVD and collagen content resulted increased at 12 weeks after surgery in both groups, however only data on collagen content in test group increased significantly. CONCLUSIONS: The alveolar ridge augmentation procedure increases the possibility to insert implants without sinus augmentation procedure. PBBM undergoes remodeling process, however particles included in newly formed bone still remain at 9 month. Soft tissue samples of the sites treated with PBBM particle and covered with collagen membrane showed an initial delayed healing process with a lower microvascular density and collagen content that sites treated with filling material alone. Subsequently sites treated with the membrane seem to gain the same maturation level than control sites, and were characterized by a strong augmentation of collagen fibers and microvascular density.

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Gubler, Mitchell Miles. "Efficacy of socket grafting for alveolar ridge preservation: a randomized clinical trial." Thesis, University of Iowa, 2015. https://ir.uiowa.edu/etd/1848.

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Objectives: Tooth extraction initiates a cascade of events that often leads to local anatomic changes in the alveolar ridge. Ridge preservation is a surgical approach aimed at minimizing hard and soft tissue volume loss. There have been contradicting reports on the efficacy of socket grafting for alveolar ridge preservation. Interestingly, there is a paucity of adequately powered randomized controlled clinical trials. The purpose of this study was to assess the effect of the application of a socket grafting technique on alveolar ridge dimensional changes following tooth extraction. Methods: Healthy patients requiring the extraction of one single-rooted tooth on either arch, from second premolar to second premolar, excluding mandibular incisors, and who met the eligibility criteria were recruited. Patients were then randomly assigned to either the control group, consisting of tooth extraction alone, or the experimental group, which consisted of extraction and simultaneous ridge preservation using an allograft bone material to fill the socket and a dense polytetrafluoroethylene membrane (dPTFE) to seal it. Cone beam computed tomography (CBCT) was obtained immediately prior to extraction (baseline) and at 14 weeks. Linear measurements with the use of a tooth-supported stent were obtained immediately after extraction (baseline) and at 14 weeks. Linear and volumetric measurements were made using data obtained from the CBCTs. Masked, calibrated examiners performed all radiographic measurements. Measurements obtained included buccal keratinized tissue width, buccal and lingual plate height and width, alveolar ridge horizontal width (CBCT); and alveolar ridge volume changes. Digital planning of dental implants was performed in the ideal restorative location and need for additional grafting was virtually determined. The primary outcome of interest was volumetric reduction of the alveolar ridge at 14 weeks. Linear mixed model statistical analyses were used to compare the mean change in the measurements between the grafted and control groups. Results: A total of 59 subjects were recruited, of which 53 patients (27 control and 26 experimental) completed the study. No statistically significant difference was found between the two groups at baseline for any of the parameters analyzed. At the 14 week follow-up appointment there was an average loss in height of the buccal plate of 1.17 mm and 0.61 mm for the control (CG) and experimental (ARP) groups, respectively, showing statistical significance (p=0.012). The lingual plate height was reduced 0.7 mm in CG and 0.47 mm in ARP with no statistical significance (0.075). A linear loss in the buccal-lingual dimension of the alveolar ridge was noted radiographically in both groups, 1.68mm in CG and 1.07mm in ARP, which demonstrated a statistical significant difference between them (p=0.023). Volumetric analysis demonstrated a mean volume loss of 15.83% in the CG showing statistical significance from the 8.36% loss shown in the ARP group. This difference demonstrates a clinical significance when virtual planning of implant placement in the ideal restorative location revealed the need for additional grafting at 13/27 or 48% of CG and 3/26 or 11% of ARP sites. Additionally, a very robust, statistically significant correlation was noted between buccal bone plate width and reduction of alveolar bone volume after 14 weeks of healing (p< 0.0001). A multivariate regression analysis revealed that within the control group a buccal plate <1mm lead to >10% volumetric reduction, while the same reduction in the graft group was only seen when the buccal plate was less that 0.6mm. Conclusions: In this study, a novel volumetric analysis of alveolar ridge reduction after tooth extraction was performed, which demonstrated that socket grafting for alveolar ridge preservation does provide a therapeutic benefit. This finding was associated to a decreased probability of requiring additional grafting at the implant site. The thickness of the buccal plate at the time of extraction appears to be a valuable factor to predict the amount of resorption that will take place, meaning that more resorption should be expected, as the buccal plate gets progressively thinner.

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Duggan, Sayward. "Alveolar Ridge Dimension Analysis Following Socket Preservation Using Clinical Assessment and Cone Beam Computed Tomography (CBCT)." VCU Scholars Compass, 2001. http://scholarscompass.vcu.edu/etd/2433.

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AIM: Extraction of a tooth can lead to alveolar ridge resorption which can be minimized by socket preservation. The aim of this study is to analyze vertical and horizontal alveolar ridge dimensions clinically and by CBCT immediately following extraction and 3-4 months following socket preservation. METHODS: The preserved group (P) consisted of 20 patients with1-2 non-molar teeth requiring extraction with socket preservation, while the control group (C) consisted of 5 patients requiring extraction alone. An acrylic stent was fabricated presurgically in order to measure vertical and horizontal ridge dimensions clinically and radiographically immediately following extraction and 3-4 months following socket preservation. RESULTS: Overall, P sites gained ridge height and lost minimal ridge width over 3-4 months, while C sites lost both ridge height and width. Preserved sites in which the teeth were extracted due to caries had the most significant gain in the radiographic vertical occlusal dimension (RVO). Overall, high correlations were found between the clinical and radiographic measurements at the initial surgery and at the 3-4 month follow up. CONCLUSIONS: The preserved group had minimal ridge resorption and more socket bony fill when compared to the non-preserved group 3-4 months following tooth extraction, especially when the tooth was extracted due to caries. Additionally, the CBCT can be a useful diagnostic tool to evaluate socket preservation healing, as it compares well to clinical assessments of socket healing.

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Filho, Jorge Francisco Fiamengui. "Avaliação da remodelação do rebordo alveolar após exodontia minimamente traumática e utilização de enxerto xenógeno para preservação alveolar." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/25/25146/tde-03092015-112758/.

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Introdução: Após a exodontia, a cicatrização natural do alvéolo provoca alterações dimensionais no rebordo alveolar, com diminuição dos tecidos moles e duros. Diferentes técnicas podem ser utilizadas para tentar diminuir essas alterações, com a intenção de facilitar a reabilitação estética e funcional com implantes, principalmente em áreas de dentes anteriores. Objetivos: Os objetivos deste estudo foram verificar a eficácia da utilização do material de origem xenógena Orthogen® na preservação do rebordo alveolar pós-exodontia e avaliar as características histológicas após 4 meses de reparo. Materiais e Métodos: 20 pacientes foram divididos aleatoriamente em 2 grupos, de acordo com a abordagem que iriam receber após a exodontia de uma raiz residual. No grupo teste, os alvéolos foram preenchidos com Orthogen® e selados com EGL (Enxerto Gengival Livre). No grupo controle, um coágulo foi preservado no alvéolo e o mesmo também foi selado com EGL, sem a utilização do Orthogen®. Em ambos os grupos as exodontias foram realizadas de maneira minimamente traumática, com o Kit de Extração Atraumática Neodent®. Modelos de gesso obtidos antes das exodontias (tempo 1) e após 4 meses (tempo 2), momentos antes da instalação dos implantes, foram utilizadas para as medidas dimensionais, através do escanemento dos modelos e medidas no programa Orthoanalyzer®. Amostras ósseas obtidas após 4 meses de reparo foram utilizadas para a análise histológica descritiva. Resultados: Os resultados demonstraram que, após 4 meses de reparo alveolar, os dois grupos apresentaram remodelação do rebordo alveolar e diminuição nas medidas realizadas. Porém, a remodelação do rebordo foi mais evidente no grupo controle (coágulo). Histologicamente foi possível observar formação de novo osso ao redor das partículas do Orthogen®. Conclusões: A utilização do Orthogen® para preenchimento dos alvéolos e preservação do rebordo alveolar foi eficaz na diminuição das alterações dimensionais nos tecidos duro e mole do rebordo alveolar pós-exodontia.
Introduction: After tooth extraction, the natural healing of the socket is followed by dimensional changes of ridge contour, with marked reduce of hard and soft tissues. Socket reservation techniques can be used to improve functional and esthetics of the dental implants in this areas, especially in anterior teeth areas. Objectives: The aims of this study are to verify the efficacy of use Orthogen® to ridge preservation and analysis the histological characteristics after 4 months repair of the sockets. Material and Methods: 20 patients were randomly distributed in 2 groups, according with the treatments. In test group, the sockets were filled with Orthogen® and closed with a gingival free graft. In control group, the clots were preserved into the socket and free gingival graft was sutured in the deepithelialized marginal tissue of the socket. Stone casts were used to analyze the ridge dimensional changes with the Orthoanalyzer® software. After 4 months, bone samples were obtained during the dental implant procedure and were used to describe the histological characteristics. Results: The results showed that, after 4 months of wound healing, both groups showed a decrease in the measurements. However, the remodeling of the ridge was most evident in the control group (clot). Histological images showed the formation of new bone around the Orthogen® particles. Conclusion: The use of Orthogen® to socket preservation can collaborate to reduce the dimensional changes of the hard and soft tissue in post-extraction alveolar ridge sites.

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Lemke, Matthew Jon. "Polylactic acid (PLA) Membrane as a Sole TreatmentFor Alveolar Ridge Preservation." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1402664234.

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Glazier, Thomas F., Thomas C. Waldrop, John C. Gunsolley, and Robert Sabatini. "The Role of Leukocyte-Platelet Rich Fibrin in Human Alveolar Ridge Preservation: A Randomized Clinical Trial." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3735.

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PURPOSE: The aim of this study is to examine the healing of intact extraction sockets grafted with leukocyte-platelet rich fibrin (L-PRF) as compared to sockets grafted with freeze-dried bone allograft (FDBA) and a resorbable collagen barrier membrane (RCM). METHODS: This prospective randomized, examiner blinded pilot study included 17 subjects randomized to two treatment groups. Serum total cholesterol, low density lipoprotein (LDL), 25-hydroxyvitamin-D3, and platelet counts were determined preoperatively in all subjects. The experimental arm consisted of 8 posterior tooth-bounded intact extraction sites receiving L-PRF plugs. The control group consisted of 9 posterior tooth-bounded intact extraction sites receiving FDBA and RCM. An acrylic stent was fabricated to take duplicate clinical and CBCT measurements immediately post-extraction and at time of implant placement. A repeat-measures analysis of variance was utilized for statistical analysis. RESULTS: The study failed to detect a clinical or radiographic difference between treatment groups in horizontal or vertical ridge dimension changes. Serum cholesterol, LDL, 25-hydroxyvitamin-D3, and buccal plate thickness had a non-significant effect on outcome measurements, although there was a high prevalence of hyperlidpidemia and hypovitaminosis in the study population. CONCLUSIONS: The alveolar ridge dimension changes in intact posterior extraction sockets may be similar when either L-PRF or FDBA and RCM are utilized as socket grafting material. Although there was a high prevalence of high cholesterol and low 25-hydroxyvitamin-D3 levels in the population, this study failed to detect a significant correlation between preoperative serum levels and postoperative ridge dimension changes.

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Tengan, Kelsey S. "Prospective, comparative assessment of alveolar ridge preservation using Guidor® Easy-Graft® Classic in atrumatic extraction socket." Thesis, University of Iowa, 2017. https://ir.uiowa.edu/etd/5861.

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Objectives: Tooth extraction initiates a cascade of biological events leading to the reduction of alveolar ridge volume. Alveolar ridge preservation (ARP) is a surgical treatment which aims at minimizing hard and soft tissue changes following tooth extraction. Several techniques and materials have been studied and used clinically in ARP. The selection of the biomaterials used for this technique is determined by several factors, such as features of the extraction site, inherent biomaterial properties and handling preferences by the surgeon, among others. The purpose of this study was to evaluate the efficacy of alveolar ridge preservation via the application of Easy-graft CLASSIC® (Sunstar Americas Inc.), an alloplastic bone substitute with unique handling features, following flapless posterior single tooth extraction compared to a particulate freeze-dried bone allograft (FDBA) covered with a collagen wound dressing, which has been advocated as a predictable treatment modality. The primary outcome in this study was bone volumetric reduction of the alveolar ridge assessed using cone beam computed tomography (CBCT) scans obtained at baseline and 16 weeks after tooth extraction and ARP. Methods: This study is part of a multicenter study in collaboration with the University of Maryland School of Dentistry. Seventeen healthy adults treatment planned for a single tooth implants in the area posterior to the canines, excluding third molars, were recruited on the basis of an eligibility criteria. Patients were randomly assigned to the control group or the experimental group. Minimally traumatic extraction of the tooth was completed and the presence of an intact buccal plate of bone was verified. The control group received FDBA and the site was stabilized with a collagen wound dressing and sutures. The experimental group received Easy-graft CLASSIC® with no attempt to approximate the marginal mucosa. Healing was assessed after 1, 2, 4, 8, and 16 weeks. DICOM data was used to assess the alveolar ridge volume and linear changes from baseline to 16 weeks after ARP. Clinical measurements of the buccal gingival thickness, buccal alveolar bone thickness, keratinized gingiva, and socket dimensions were made at the time of the extraction and were subsequently analyzed for possible influences on the observed volumetric and linear outcomes. Results: The mean alveolar ridge volume reduction from baseline to 16 weeks post operatively for the control and the experimental group was 114.96 mm3 and 94.87 mm3, respectively. These values correspond to a reduction of 9.59% for the control group and 13.04% for the experimental group. This difference did not reach statistical significance. The average loss of ridge width was 1.10mm for the FDBA and 1.24mm for the Easy-graft CLASSIC® with no statically significant differences between the two groups. The average loss of buccal bone height and lingual bone height in the FDBA group was 1.12mm and 0.63mm, respectively. Similarly, the average loss of buccal bone height and lingual bone height in the Easy-graft CLASSIC® was 1.19mm and 0.67mm, respectively. There was a weak to moderate positive correlation between buccal tissue thickness and the thickness of the buccal bone and a weak negative correlation between buccal bone thickness and alveolar ridge width reduction. Conclusions: Within the limitations of this study, both treatment groups appear to be effective in alveolar ridge preservation and are associated with similar volumetric and linear bone reduction patterns.

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Salas, Mabel L. "Alveolar Ridge Preservation at different anatomical locations – Clinical and Histological evaluation of treatment outcome." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1259787215.

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Milani, S. "DEPROTEINIZED BOVINE BONE GRAFT REMODELING PATTERN IN ALVEOLAR SOCKET. HISTOLOGIC AND IMMUNOHISTOLOGICAL EXPRESSION EVALUATION." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/229907.

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Deproteinized bovine bone (DBB) is a bone graft highly used in dentistry in bone regeneration and alveolar socket preservation techniques. Although there is a scientific consensus on the clinical benefit of this biomaterial, and several in vitro studies described its biologic effect on osteoblasts, in vivo analyses investigating its effect on bone dynamics on human are lacking. For this purpose 20 patients needing tooth extraction and implant placement were selected and randomized in test (alveolar socket preservation with DBB) and control (spontaneous healing). Bone specimens were collected during tooth extraction (T0) and, at 5 months, during implant placement (T1). The collected samples were processed for histologic and immunohistological analyses to reveal the presence of positive (BMP-2, BMP-7, ALP) and negative (Il-6, TNF-α) markers of bone remodeling. The sections were then micro-photographed, quantification was done and statistical analyses were performed to compare T0 and T1 in both groups and T1 test group versus T1 control group. The obtained results showed higher expression of BMP-2, BMP-7 and IL-6 at T1 in both groups (p<0.05), lower expression of ALP in both (p<0.05) at T1 and higher expression of TNF-α only in test group (p<0.05) while in control group it remained stable during time. When comparing T1 markers expression in control and test groups, a higher expression of BMP-2 (p<0.05) and lower expression of TNF-α (p<0.05) were found in the first one. These results are in concordance with the previous in vitro studies and show that DBB is able to maintain bone remodeling in active phases. As a matter of fact at 5 months a higher expression of the positive markers (BMP-2, BMP-7) was noticed compared to T0, but the presence of DBB resulted in lower expression of BMP-2 and higher expression of inflammatory factor (TNF-α) when comparing to spontaneous healing at the time of the implant placement.  For these reasons the use of DBB is suggested when clinical needs lead to a precise indication of alveolar socket preservation with biomaterial, while, if not clinically necessary, spontaneous healing is indicated because it shows more biological positive effects.

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Szathvary, Isacco. "Soft and hard tissues in esthetic implant dentistry: a novel 3D computer-aided approach to dimensional changes evaluation in immediate vs delayed implantation treatment." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3423984.

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Aim of this work is to develop and to validate a structured methodology to investigate the three-dimensional variation that occurs around implants in dentistry. Surgeons need to know in an objective way if what they are doing is correct and if it is the best for the patient. In last decades implantology deeply changed the way to operate of dentists, giving to the patients new opportunities to replace missing teeth. Implantology has known a very big spread all around the world and numbers of patients treated with success is growing year by year. To know exactly what happens around implants is a growing need for clinicians. A standardized method that can investigate in an objective way what soft and hard tissues do around implants doesn’t exist yet. The solutions that researchers used in literature are various and difficult to compare each other. This work after a general discussion that follows the evolution of implantology, wants to investigate some new instruments that could lend to the comparability of results among different studies and finally to give better answers to the clinical questions. Using the method proposed in this work, soft-hard tissue variation are been evaluated from a new prospective that gave impressive results both qualitatively and quantitatively speaking. The procedure is recommended as a new aid in the future studies.
Obiettivo del lavoro è di sviluppare e validare una metodologia strutturata per indagare la variazione tridimensionale che avviene intorno agli impianti endossei in odontoiatria. I chirurghi hanno bisogno di sapere in modo oggettivo se quello che stanno facendo è corretto ed è la migliore terapia per il paziente. Negli ultimi decenni l’implantologia ha profondamente cambiato il modo di operare dei dentisti, dando ai pazienti nuove opportunità per sostituire i denti mancanti. Implantologia ha conosciuto una grande diffusione in tutto il mondo e il numero di pazienti trattati con successo sta crescendo di anno in anno. Sapere esattamente ciò che accade intorno agli impianti è una crescente necessità per i medici. Un metodo standardizzato che possa indagare in modo oggettivo come si modifichino i tessuti duri e molli intorno agli impianti non esiste ancora. Le soluzioni che i ricercatori hanno utilizzato in letteratura sono molteplici e difficili da confrontare tra loro. Questo lavoro, dopo una discussione generale che segue l'evoluzione dell’implantologia, vuole approfondire l’uso di alcuni nuovi strumenti che possano portare alla comparabilità dei risultati tra i diversi studi e, infine, di dare risposte migliori alle domande cliniche che ancora non hanno risposta. Utilizzando il metodo proposto in questo lavoro, è possibile valutare i tessuti peri-implantari da una nuova prospettiva che ha dato risultati impressionanti sia sul versante qualitativo sia su quello quantitativo. La procedura è un ausilio raccomandato come nuovo aiuto nei futuri studi.

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Cooper, Anthony John. "Cambridge preserved? : the Cambridge Preservation Society and the city's green belt 1928-85." Thesis, Middlesex University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361844.

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As a contribution to the history of Town and Country Planning this work shows how the Cambridge Preservation Society came to be instrumental in the formulation of a policy of containment for the city which led to the creation of the city's green belt. In doing so it describes how the Town Planning system developed in the 1930s and 1940s in relation to an historic town and how that system was manipulated by a private but influential group of individuals who had come together to preserve their local environment. The origins of the society are traced from the individuals who had campaigned for the drawing up of a regional plan to control indiscriminate building development on the fringes of the town (as it then was). The society was formed in 1928 with an Executive Committee drawn from leading members of Cambridge University and from the town. The work of the society is described, beginning with the purchase of open land on the outskirts of Cambridge to preserve it from building development and the purchase of restrictive covenants ("sterilisation") from the owners of other land nearby to the same end. The evolution of each of the milestones in the history of the planning of Cambridge and its hinterland is described, beginning with the Cambridgeshire Regional Planning Report (the "Davidge Report") of 1934 and including the pre-Second World War Cambridge & District Town Planning Scheme, the 1950 Holford Report on Cambridge and the first Cambridgeshire Development Plan of 1952. The society took part in each of these, consistently promoting the preservation of the character and setting of Cambridge as the 'only true university town in England.' The main aim of the society was achieved with the establishment of the Cambridge Green Belt, first proposed in 1958 but not formally approved until 1992. The development of that green belt over that period is described. The circumstances of the purchase by the society of the Wandlebury Estate on the summit of the Gog Magog Hills south east of Cambridge are described. The estate is now maintained by the society as a public country park.

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Grilc, Brandon. "Stealing Home: How American Society Preserves Major League Baseball Stadiums, Ballparks, & Fields." Thesis, University of Oregon, 2014. http://hdl.handle.net/1794/18547.

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This study focuses on a cultural phenomenon that is driven by the demolition of Major League Baseball stadiums, ballparks, and fields. Prompted by their inherent role in the evolution of the sport and the inadequacies of the existing historic preservation framework, this study examines how American society preserves this utilitarian form, after their demolition, through observations, data collection, and analysis. In doing so, this study exposes that Major League Baseball stadiums, ballparks, and fields are preserved through the use of nine overlapping preservation methods, which memorialize five significant features. However, though these preservation methods do not prevent Major League Baseball stadiums from being demolished, they do illustrate how our society alternatively preserves historically and culturally significant resources when the existing historic preservation framework is rendered incompatible.

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Moreno, Christopher. "A Case for Building Conservation in a Modern Society: Bear Down Gym." The University of Arizona, 2015. http://hdl.handle.net/10150/584145.

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Sustainable Built Environments Senior Capstone Project
Increasing demand for new construction has made the building sector responsible for approximately 43 percent of carbon dioxide (CO2) emissions in the United States. Building conservation, an intervention strategy that refurbishes an existing building without compromising its architectural integrity, is a response to the population’s current infatuation with the new and now that has desensitized modern culture to the past, while surfacing one’s responsibilities to future generations. The focus of this study will be on the University of Arizona’s Bear Down Gym. Through a historical and architectural evaluation, this report makes a case for the rehabilitation of Bear Down Gym in respect to the Secretary of Interior’s Standards for Rehabilitation.

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Kajsa, Rosén-Wiksten. "I de obesuttnas spår : En arkeologisk analys av de obesuttna i Vena & Målilla socken." Thesis, Uppsala universitet, Arkeologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446314.

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The unpropertied, also known as subaltern people, were a social class that lived during the 18th, 19th, and 20th century in Sweden. They were a social class that hade very few rights and had torely on the closest farmer and his lands to get by. But also, other jobs, for example as a farm maiden or as a shoemaker. In archaeology, remains after the unpropertied are still visible in the cultural landscape they once created. Despite this, the interest and effort in keeping the memory of the unpropertied alive is very little. This is what this essay aims to discuss. This essay will, through a case-study, show how remains after the unpropertied are still visible in the cultural landscape. The casestudy will examine how and where the unpropertied is found in the landscape. The limitation will be at the border between Vena and Målilla parish. It also aims to examine the status of the remains and if the area where the remains are located have been preserved with the intention to focus on the history it holds. The essay also includes multiple historical maps and church archives with the purpose to put a relative date on the objects that has been examined. Later, the author will discuss why the history of the unpropertied is important to preserve and enlighten to the public. This will be discussed with the case-study and other archeological reports from excavations as a foundation, but also other articles regarding the subject in matter.

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Ayling, Benjamin Charles II. "An historical perspective of international champion quartets of The Society For The Preservation and Encouragement of Barber Shop Quartet Singing in America, 1939-1963." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1304016438.

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Ayling, Benjamin Charles. "An historical perspective of international champion quartets of The Society for the Preservation and Encouragement of Barber Shop Quartet Singing in America, 1939-1963 /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488193665233569.

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Scott-Woolery, Lois Carol. "Authentic tradition in Cherokee medicine: A comparative study of the revitalization, preservation, and the new age exploitation of traditional Cherokee medicine." CSUSB ScholarWorks, 1995. https://scholarworks.lib.csusb.edu/etd-project/983.

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Hedermo, Viktor. "Kollektiv identitet och bevarandestrategier i Malmberget : En studie om samhällsomvandlingen i Gällivare kommun." Thesis, Stockholms universitet, Sociologiska institutionen, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-155368.

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Focusing on the town of Malmberget in northern Sweden, this study addresses the relationship between place, identity formation and social transformation among mining communities. Due to an expanding mining area, the town is being gradually demolished and remaining inhabitants will eventually have to be relocated. Concurrently, urban expansion plans are underway in the neighboring town of Gällivare. The aim of the study is to examine whether and how collective forms of identity are constructed in relation to Malmberget as place. What are the main values underlying such collective identity and are they being taken into considerations in the expansion plans? The study also examines if and how any attempts to preservation have been made in response to the demolition and redevelopment. The study is primarily based on interviews with inhabitants of Malmberget. It also draws on qualitative content analysis of documents on the expansions plans. As the study focuses on notions of place and collective identity, in its theoretical framework Lefebvre’s spatial triad is combined with a phenomenological approach of place and Jenkins’ conceptualisation of collective identity. The findings suggest that there exists a collective ‘Malmberget identity’ consisting of certain values connected to place relations and community history. Some aspects of these values have implicitly been taken into considerations in the expansion plans in Gällivare, but far from all of them. The study also shows how interviewees have enacted preservation strategies as a way to cope with the urban transformation and to protect their shared collective identity.

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Castro, Fernando Silva de. "Avaliação da manutenção da dimensão de rebordo alveolar após enxerto aloplástico de composto ósseo de rícino pós-extração dental em rato, estudo radiográfico e histológico." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/82/82131/tde-10052006-093036/.

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O objetivo deste trabalho é o estudo do comportamento do enxerto de composto ósseo de rícino e sua eficácia na manutenção do rebordo alveolar. Através de avaliações histológicas e radiológicas. A cicatrização após as extrações dentárias faz com que o osso da região entre em um processo de atrofia. Existem técnicas preventivas para manutenção das dimensões do sitio de extração. As técnicas podem ser: implantes dentários, regeneração óssea guiada, enxertos ósseos e estas técnicas combinadas. A técnica de enxerto ósseo se baseia na ocupação do espaço, pelo biomaterial. O composto ósseo de rícino se destaca entre os aloplásticos, pois é de origem vegetal e tem se mostrado eficiente biomaterial na área odontológica. Foram utilizados neste trabalho 19 ratos Wistar. Dezoito ratos tiveram o incisivo lateral esquerdo extraídos e quatorze deles receberam o implante de composto ósseo de rícino, formando o grupo experimental, estes foram divididos em dois períodos de sacrifício, 30 e 45 dias, assim como o grupo de controle que não recebeu nenhum tipo de tratamento. O último animal é o animal padrão ouro que serviu de exemplo de estrutura íntegra. Os animais foram mortos humanitariamente e tiveram os fragmentos teciduais removidos a fim de serem analisados histologicamente sob microscopia óptica. Foram feitas tomadas radiográficas em filme odontológico de perfil e ântero-posterior imediatamente após a extração e imediatamente após a morte. As peças anatômicas foram retiradas e processadas para confecção de lâminas. Foi comparado radiograficamente e histologicamente o reparo do alvéolo preenchido por composto ósseo de rícino de uso odontológico com reparo fisiológico de outro alvéolo de extração dentária preenchido apenas com o coágulo formado nos dois grupos experimentais. O resultado evidenciou a manutenção dimensão alveolar pós-extração dentária nos grupos que receberam o composto ósseo de rícino. A técnica de preenchimento mostrou ser eficiente, tendo como resultado uma diminuição mínima das dimensões do alvéolo pós-extração dentária. Neste presente trabalho a técnica de preenchimento de alvéolo com o enxerto de composto ósseo de rícino se apresentou eficaz na manutenção das dimensões do osso alveolar
The aim of this work is to study the behavior of the castor bean alloplastic polymer bone graft on ridge preservation. The dental extraction cicatrization process is an atrophy process. There are preventive techniques for maintenance of the dimensions of the alveolar ridge. These techniques are: dental implant, guided bone regeneration, bone graft and the combination of these techniques. The technique of bone graft is based on filling the space with the biomaterial. The castor bean alloplastic polymer bone graft surpasses the alloplastic because it is of vegetable origin and shown efficient biomaterial in the odontological area. Eighteen rats had the left lateral incisor extracted and fourteen of them received castor bean alloplastic polymer bone graft in the extraction socket, forming the experimental group. These were divided in two groups with different sacrifice time, 30 and 45 days. The control group that did not receive any treatment. The last animal is the standard gold group that served as example of complete structure. The animals were killed and they had the tissue fragments removed in order to have histological analysis under optical microscopy. It was taken occlusal radiographs and lateral cefalometric radiographs in odontological films profile immediately after the extraction and after the death. The anatomical pieces were removed and processed for making of slices. It was evaluate histologically and radiographically the wound of the extraction sockets with the graft compared to physiologic repair. The result evidenced the maintenance dimension alveolar dental sockets in the groups that received castor bean alloplastic polymer bone graft. The graft technique showed to be efficient, resulting in a minimum decrease of the dimensions of the extraction sockets. In this present work the graft technique with castor bean alloplastic polymer bone graft came effective in the maintenance of the dimensions of the alveolar bone

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Widner, David E. "BRIDGING THE GAP BETWEEN TRADITIONAL CULTURE AND MAINSTREAM SOCIETY: DEVELOPING AN ENVIRONMENTAL EDUCATION AND STREAM HEALTH MONITORING PLAN TO PROMOTE THE IMPROVEMENT OF THE SUGAR CREEK WATERSHED AND THE PRESERVATION OF SWARTZENTRUBER AMISH CULTURE." Kent State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=kent1416446669.

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Dressler, Karine Georg. "Portal de gestão da Prefeitura Municipal de Porto Alegre : um estudo sobre preservação no meio eletrônico." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/30216.

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Trata da preservação de documentos arquivísticos produzidos e mantidos no meio digital através da análise do Portal de Gestão da Prefeitura Municipal de Porto Alegre tendo por base teórica a diplomática contemporânea. Parte da origem do termo arquivo à análise da sociedade contemporânea sob os pontos de vista da sociedade da informação, sociedade do controle e da sociedade de vigilância. Diferencia os paradigmas Custodiai e Pós-Custodial e discute a proposta da arquivística integrada. Analisa a diplomática voltada aos documentos medievais, a diplomática especial e a diplomática arquivística contemporânea. que une os preceitos da Diplomática e os conceitos da Arquivologia. Apresenta o Projeto InterPARES, sua base teórico-metodológica e os resultados já obtidos pelo projeto e aplicados na presente pesquisa. Discute a preservação de acervos documentais, tradicionais e digitais, destacando as peculiaridades da preservação dos documentos arquivísticos digitais, fidedignos e autênticos. Apresenta os resultados da pesquisa realizada concluindo que o Portal de Gestão é um documento arquivístico digital, que mantém outros documentos, e pela necessidade do estabelecimento de um plano de preservação para garantir seu acesso de longo prazo.
This paper focuses on the preservation of archival documents produced and maintained in the digital environment trough analysis by the Porto Alegre City Hall Management Portal based on theoretical contemporary Diplomatic. It sets off from the origin of the term archive to the analysis of contemporary society from the views of information society, society of control, and surveillance society. It distinguishes Custodiai and Post-Custodial paradigms and discusses the proposal of an integrated archival. It analyzes the Diplomatic focused on medieval documents, the Special Diplomatic and the Contemporary Archival Diplomatic, which gathers the precepts of the Diplomatic and the concepts of Archival. It presents the InterPARES Project, its theoretical and methodological basis, and the results already achieved by the project and applied in this research. It discusses the preservation of documentary, traditional and digital collections highlighting the preservation of digital archival documents peculiarities while maintaining its reliability and authenticity. It presents the results of the survey, concluding that the Management Portal is a digital archival document which holds other documents, and that it is necessary to establish a preservation plan to ensure its longterm access.

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OLIVEIRA, JÚNIOR Edilson Cavalcante de. "Nas trilhas da floresta urbana : gestão ambiental e conflitos na Mata do Passarinho (Olinda – PE)." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/17244.

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Submitted by Haroudo Xavier Filho (haroudo.xavierfo@ufpe.br) on 2016-07-01T13:14:52Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) FURB Mata do Passarinho_Edilson Cavalcante Jr.pdf: 9643936 bytes, checksum: 7a1e98acb15d19f655e9356677cac4f6 (MD5)
Made available in DSpace on 2016-07-01T13:14:53Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) FURB Mata do Passarinho_Edilson Cavalcante Jr.pdf: 9643936 bytes, checksum: 7a1e98acb15d19f655e9356677cac4f6 (MD5) Previous issue date: 2015-12-22
CAPES
As florestas urbanas são entendidas pela legislação ambiental como porções remanescentes e ameaçadas do ecossistema Mata Atlântica exclusivamente inseridas no tecido urbano. Uma das florestas urbanas em Pernambuco é a Mata do Passarinho, localizada na cidade de Olinda, às margens do Rio Beberibe. O município de Olinda não foi capaz de oferecer, no passado, condições plenas de preservação para a Mata do Passarinho, que se tornou alvo de intensas disputas por terra e processos de degradação. Após muitas tentativas de recuperação e recategorizações legais, ocorre hoje para a Mata do Passarinho o momento de maior segurança em termos jurídicos, institucionais e ambientais, tendo seu espaço utilizado para atividades de visitação e educação, além de possuir um dos poucos planos de manejo no estado pernambucano. Entretanto, existem tensões latentes com as populações próximas e possibilidades de melhoria do trabalho institucional no quesito de apropriação social dos processos de gestão ambiental. Esta dissertação aborda as questões ambientais da Mata do Passarinho, sua história, composição e possibilidades de futuro, bem como as comunidades em vulnerabilidade socioambiental que a rodeiam, discutindo os conflitos, processos políticos-decisórios e relação sociedade-natureza contextualizada no território analisado.
Urban forests are perceived by environmental legislation as remaining and endangered portions of the Mata Atlântica ecosystem entirely inserted into the urban tissue. One of Pernambuco's urban forest is Mata do Passarinho, located in the city of Olinda, on the Rio Beberibe shores. The municipality of Olinda was not able to offer, in the past, suitable conditions of preservation to the Mata do Passarinho, which became subject of intense disputes over land and degradation processes. After many recovery attempts and legal re-categorizations, occours today for the Mata do Passarinho the greater moment of security in legal, institutional and environmental terms, having its space used for visitation and educational activities, as well as having one of the few management plans in the Pernambuco state. However, there are underlying tensions with nearby populations and possibilities of institutional work improvements on the environmental management social ownership matter. This dissertation addresses environmental issues of Mata do Passarinho, its history, composition and future possibilities as well as the social and environmental vulnerable communities that surround it, discussing conflicts, political decision-making processes and contextualized society-nature relationship in the analyzed territory.

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Blackwell, Dean. "Community and visitor benefits associated with the Otago Central Rail Trail, New Zealand." Lincoln University, 2002. http://hdl.handle.net/10182/1027.

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Outdoor recreation and heritage resources have the potential to provide a wide range of benefits to individuals, groups of individuals and the economy. An increased knowledge of these benefits can give recreation managers and planners a better understanding of how their actions and decisions regarding a resource may impact upon the visitors and communities that they serve. Placed within a climate of increasing public sector accountability, this information might also prove useful in justifying the allocation of scarce resources to recreation and heritage preservation. Justifying the value that recreation adds to society is an issue recognised by Benefits Based Management (BBM), a recreation management and planning framework that seeks to identify and target the positive outcomes realised by individuals, groups, local businesses and communities that result from participation in recreation and leisure. To date, recreation planners and managers have not been presented with a BBM research effort that seeks to describe and understand the visitor and community benefits associated with a rail to trail conversion. This study aimed to identify and describe benefits gained by visitors and neighbouring communities, with specific reference to the Otago Central Rail Trail (OCRT), Central Otago, New Zealand. Information was gathered from seventy-seven semi-structured interviews with visiting users of the OCRT, residents of neighbouring communities and trail managers. The results of the study indicated that community stakeholders reported benefits such as local economic development linked to visitor expenditure, heightened sense of community identity and solidarity and social contact with people from outside the local area. An additional finding was that the perceived benefits of the OCRT have reportedly had a positive influence on local people's attitudes towards the rail trail. Visitor interviews revealed that personal and social well-being benefits such as physical activity, aesthetic appreciation, sense of achievement, psychological refreshment, family togetherness and social interaction with friends and local people were outcomes of an OCRT visit. Reported visitor benefits were further linked to physical fitness and health, enhanced mood and positive mental state, leading a balanced lifestyle and stronger relationships within families and between friends. Visitors also perceived that an OCRT visit had forged a greater knowledge and awareness of railway heritage through gaining insight into railway and Central Otago history and appreciation of the engineering skills and craftsmanship associated with 19th century railway construction. Following the benefit chain of causality (Driver, 1994; Driver & Bruns, 1999; McIntosh, 1999), interview responses were linked to potential community and visitor benefits that could be realised off-site such as enhanced quality of life, community satisfaction and a greater connection with and appreciation of New Zealand's historic and cultural heritage.

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Bauer, Sebastian. "Jüdische Geschichtsschreibung zwischen Reform und Orthodoxie. Die Positionen von Ludwig Philippson und Marcus Lehmann." HATiKVA e.V. – Die Hoffnung Bildungs- und Begegnungsstätte für Jüdische Geschichte und Kultur Sachsen, 2015. https://slub.qucosa.de/id/qucosa%3A34948.

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Mantalenakis, Iason. "Socket shield with immediate implant placement, a ridge preservation technique." Master's thesis, 2018. http://hdl.handle.net/10284/7418.

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Objetivo-O objetivo deste estudo foi acessar a eficácia da combinação de socket shield com a colocação imediata do implante como um método para produzir um resultado mais estético para uma restauração na zona estética anterior, onde normalmente a reabsorção natural do osso no sitio de extracção não permitiria isso. O socket shield, que é a retenção de um fragmento radicular in situ com o osso alveolar, é usado como uma técnica de preservação do rebordo alveolar e o implante restaura a funcionalidade da oferta de dente. Materiais e Métodos -Com o objectivo de descrever esta técnica foram efectuadas pesquisas em bases de dados como: Medline e Pubmed e livros entre os meses de de Abril e Julho de 2018. Um número de artigos publicados entre 1967 e 2018. As palavras-chave usadas foram : “socket shield”, “membrana radicular”, “preservação de rebordo alveolar”, “implante imediato”, “remodelação de soquete”, “alterações de crista dimensional”, “histologia periodontal”, “técnica de submersão de raízes”, “estabilidade primária”, reabsorção óssea alveolar ”,“ preservação do rebordo alveolar ”. Conclusão- Podemos concluir a partir deste estudo que a retenção de uma parte bucal da raiz no interior da cavidade é uma técnica de preservação do rebordo alveolar muito viável e bem sucedida, combinada com a colocação de implantes imediatos. Mostrando excelentes resultados, volumétricos e estéticos.
Aim- The aim of this study was to analyse the effectiveness of combination of socket shield technique with immediate implant placement as a method to produce a more aesthetic result for a restoration in the anterior aesthetic zone where normally the natural resorption of the bone of the post extraction site wouldn’t permit that due to alterations of the socket dimensions. Socket shield, which is the retaining of a root fragment in situ with the alveolar bone, is used as an alveolar ridge preservation technique and the implant restores the tooth offering functionality. Materials and Methods-For this purpose a research has been done and data was obtained from on-line resources: Medline and Pubmed and books. The research was conducted between April 2018 and July 2018. A number of articles have been obtained dated between 1967 and 2018. The key words used were “socket shield”, “root membrane”, “alveolar ridge preservation”, “immediate implant”, “socket remodelling”, “dimensional ridge alterations”, “periodontal histology”, “root submerge technique”, “primary stability”, “alveolar bone resorption”, “alveolar ridge preservation”. Conclusion- The conclusion of the study is that the retaining of a buccal part of the root inside the socket is a very viable and successful alveolar ridge preservation technique when it is combined with colocation of immediate implant, presenting excellent survival, volumetric and aesthetic results.

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Ferreira, João Luís Prata. "“Socket shield technique" : qual a evidência científica?" Master's thesis, 2019. http://hdl.handle.net/10400.26/30995.

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Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Com o avanço da ciência dá-se regularmente a mudança de certos paradigmas, na Medicina Dentária isto não é exceção. Nestes últimos 20 anos, o princípio base de uma reabilitação oral deixou de ser o alcance exclusivo da função, passando a estética a ser um fator preponderante no sucesso dos tratamentos. No que respeita a implantologia, isto é particularmente verdade sendo que a estética deixou de ser um fator secundário para ser o objetivo primário. Assim nascem novas técnicas cirúrgicas cujo foco é alcançar melhores resultados estéticos. A técnica estudada nesta dissertação é a socket shield. O objetivo desta revisão de literatura passa pelo estudo da evidência científica até a atualidade relativamente à técnica socket shield, e avaliação da sua viabilidade como técnica cirúrgica capaz de ser incutida na prática clínica diária. Após uma revisão da bibliografia disponível até à data pode-se concluir que a técnica socket shield apresenta resultados estéticos promissores e apresenta vários benefícios para o clínico e para o paciente, por outro lado o número de complicações reportadas é baixo e os níveis de reabsorção dos tecidos periodontais é igualmente reduzido. Embora esta técnica apresente bons resultados, quer a nível estético, quer a nível funcional, trata-se ainda de uma técnica recente, sendo necessário um maior número de estudos num patamar de evidência científica mais elevado e com avaliação a longo prazo.
With the advancements in science, certain paradigms change regularly, in Dentistry this is no exception. In the last 20 years, the basic principle of oral rehabilitation stopped being the exclusive scope of function, and aesthetics began to be considered the major factor in the success of treatments. With regards to implantology, this is particularly true as aesthetics are no longer a secondary factor but a primary goal. Thus, new surgical techniques are born, whose focus is to achieve better aesthetic results. The technique studied in this dissertation is the socket shield. The aim of this literature review is to study the scientific evidence to date regarding the socket shield technique, and to evaluate its feasibility as a surgical technique capable of being embedded in daily clinical practice. After a review of the literature available to date, it can be concluded that the socket shield technique has promising aesthetic results and several benefits for the clinician and the patient. On the other hand, the number of reported complications is low and the levels of resorption of the periodontal tissues is also reduced. Although this technique has good results, both aesthetically and functionally, it is still a recent technique and more studies are needed at a higher level of scientific evidence and with longterm evaluation.

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Martins, Ana Inês Teixeira Alves. "Aplicabilidade da técnica de socket shield na preservação alveolar." Master's thesis, 2019. http://hdl.handle.net/10284/9099.

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Introdução: Com o objetivo de superar as consequências negativas da extração dentária surge a técnica de Socket Shield. Esta, ao manter intencionalmente a secção vestibular da raiz dentária no momento da colocação imediata do implante, mantem a vascularização periodontal contribuindo para limitar a atrofia alveolar que resultaria da extração dentária. Objetivo: Demonstrar a eficácia da técnica de Socket Shield na preservação alveolar e na minimização de perdas ósseas e tecidulares através do processo de remodelação. Materiais e métodos: A pesquisa bibliográfica foi efetuada segundo palavras-chave, com recurso às seguintes bases de dados: PUBMED e B-ON. Conclusão: Técnicas como a de Socket Shield em que se preserva a parede vestibular são mais eficazes na preservação alveolar. Todavia, são novas metodologias de colocação de implantes que devem ser estudadas para garantir uma maior evidência científica e um bom desempenho clínico a longo prazo.
Introduction: In order to overcome the negative consequences of tooth extraction, the Socket Shield technique emerges. This intentionally maintains the vestibular section of the dental root at the moment of immediate placement of the implant, maintaining the periodontal vascularization and contributing to limit the alveolar atrophy that would result from this extraction. Objective: Demonstrate the effectiveness of the Socket Shield technique in alveolar preservation and in the minimization of bone and tissue losses through the remodeling process. Materials and methods: The bibliographic research was carried out according to keywords, using the following databases: PUBMED e B-ON. Conclusion: Techniques such as Socket Shield were the vestibular portion is maintained are more effective in alveolar preservation. However, they are a new method of implant placement that should be studied to guarantee more scientific evidence and to ensure that it is performed well over the long term.

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Correia, Henrique Rodrigues do Carmo. "Prevenção da reabsorção óssea alveolar após extração dentária." Master's thesis, 2016. http://hdl.handle.net/10284/5614.

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Introdução: O processo alveolar é o conjunto de osso que se encontra em redor da raiz do dente. Este osso é sensível a uma variedade de fatores ambientais e fisiológicos que influenciam a sua integridade e o seu funcionamento. Como tal, a sua formação assim como a sua preservação é dependente da presença contínua do dente. A reabsorção do processo alveolar após extração dentária é uma consequência natural e fisiológica indesejável, que pode dificultar a colocação de um implante dentário na posição desejada. Com o aumento cada vez mais das demandas estéticas em medicina dentária, torna-se, portanto, necessário prevenir que a reabsorção óssea provoque este defeito na arcada dentária. Objetivos: Realizar uma revisão bibliográfica sobre as várias técnicas e materiais para preservação do rebordo alveolar, a fim de prevenir ou minimizar a reabsorção alveolar após extração dentária. Material e Métodos: A pesquisa foi realizada nas bases de dados Pubmed, B-on e Scielo, não foi aplicado nenhum limite temporal, e os critérios de inclusão foram artigos em língua inglesa e portuguesa. Num total de 164 artigos, selecionaram-se 82 estritamente relacionados com o tema. Os artigos excluídos desviavam-se do objetivo do trabalho ou eram inconclusivos. Selecionaram-se, também, capítulos do livro Clinical Periodontology and Implant Dentistry Volume 1 e 2, dos autores Niklaus P.Lang e Jan Lindhe. Desenvolvimento: De modo a compreender como o processo alveolar reabsorve, deve-se ter em conta as várias técnicas que se podem realizar para permitir uma boa quantidade de osso remanescente na arcada adequada a cada caso para uma possível reabilitação. As técnicas de preservação do osso alveolar após extração passam pela realização de técnicas cirúrgicas minimamente invasivas, estabilização do coágulo pelo princípio da cicatrização por primeira intenção usando membranas ou retalhos, preenchimento do alvéolo dentário com materiais de enxerto ou substitutos ósseos, terapias combinadas com a colocação de implantes imediatos e o recurso a células e fatores de crescimento. Conclusão: A preservação alveolar tem grande importância para uma posterior reabilitação oral com implantes com maior quantidade de osso disponível do que quando não é feita qualquer tipo de preservação. A extração das peças dentárias deve ser feita com cuidado para preservar ao máximo ou não danificar as superfícies ósseas remanescentes. É aconselhado que o encerramento da ferida seja por primeira intenção e que proporcione estabilidade ao coágulo, podendo ser usado retalhos ou mesmo membranas. O uso de enxertos ósseos tem uma importante função de proporcionar uma matriz para o coágulo se formar e promover o processo de cicatrização. O método de implante imediato, para além de ser bastante usado, tem como finalidade o conforto para o paciente de não ser submetido a uma posterior cirurgia para colocação do mesmo e, simultaneamente, mantem a estabilidade dos tecidos moles. Ainda uma técnica menos usada é com células e fatores de crescimento que proporciona uma cicatrização mais rápida e um aumento do potencial regenerativo dos tecidos.
Introduction: The alveolar process is the bone that is set around the tooth root. This bone is sensitive to a variety of environmental and physiological factors that influence its integrity and functioning. As such, the formation as well as its preservation is dependent on the continued presence of the tooth. The resorption of the alveolar process after tooth extraction is undesirable natural and physiological consequence, and it can hinder the placing of an implant. With the increasing of the aesthetic demands in dentistry, it is therefore necessary to prevent bone resorption causes this defect in the dental arch Objectives: A literature review of the various techniques and materials for preservation of the alveolar ridge in order to prevent or minimize alveolar resorption after tooth extraction. Methods: The search was conducted in Pubmed, B-on and Scielo, no temporal limits were applied, and the inclusion criteria were articles in English and Portuguese. In a total of 164 articles, 82 articles were selected. Items excluded if deviating from the purpose of the work or were inconclusive. Chapters of the book Clinical Periodontology and Implant Dentistry Volume 1 and 2, of the authors Niklaus P.Lang and Jan Lindhe, were also used in this bibliographic review. Bibliographic review: In order to understand the alveolar process resorption, it must be taken into account the various techniques that can be performed to allow a good amount of bone remaining in the proper arch in each case for a possible rehabilitation. The preservation of the alveolar bone techniques after extraction pass through the performance of minimally invasive surgical techniques , stabilization of the clot by the principle of first intention healing using membranes or patches , fill the dental alveolus with graft material or bone substitutes, combinants therapies with the placement of immediate implants and the use of cells and growth factors. Conclusions: Alveolar preservation have a great importance for further oral rehabilitation with implants with greater amount of bone available than when it is not made any kind of preservation. The tooth extraction should be done with care to preserve as much or not damage the remaining bone surfaces. It is advised that the closure of the wound is by first intention and provides stability to the clot and may be used flaps or membranes. The use of bone grafts have an important function of providing a matrix for the clots to form heal. The immediate implantation method is widely used and is intended for the comfort of the patient not be subjected to further surgery for implanting the same, and likewise maintains the stability of the soft tissue. Even a less technique is used with cells and growth factors which provide the faster healing and increased tissue regenerative potential.

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Duquesnel, Virginie Agnès Diane. "Preservação alveolar após extração." Master's thesis, 2018. http://hdl.handle.net/10284/7469.

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Objetivo: Avaliar a eficácia de diferentes técnicas e materiais usados na preservação do rebordo alveolar pós-extração versus a cicatrização natural de cavidades não tratadas. Materiais e Métodos: Realizou-se uma pesquisa bibliográfica, recorrendo à base de dados da PubMed. Apenas foram incluídas revisões sistemáticas e meta-análises, publicadas nos últimos 10 anos, em língua inglesa, portuguesa ou francesa. A pesquisa resultou num total de 13 artigos. Resultados: A reabsorção do rebordo alveolar, através de técnicas de preservação, pode ser limitada, mas não totalmente impedida. Não existem evidências suficientes para favorecer uma técnica (ou material) em detrimento de outra(o). Conclusão: São necessários mais estudos clínicos randomizados, com tempos de follow-up e amostras maiores, que permitam uma compreensão mais clara dos fatores locais e sistémicos que interferem na ARP e dos parâmetros que contribuem para o seu sucesso, de forma a se poder definir um protocolo padrão e identificar os materiais de preenchimento ideais.
Objective: To evaluate the effect of different techniques and materials used in alveolar ridge preservation in post-extraction sockets, compared to unassisted socket healing. Materials and Methods: A literature search was carried out using the Pubmed database. Only systematic review and meta-analysis, published in the last 10 years, in English, Portuguese or French have been included. The search resulted in a total of 13 articles. Results: The alveolar ridge resorption, through preservation techniques, may be limited but cannot be eliminated. There is not enough evidence to privilege one technique (or material) to the detriment of all others. Conclusion: Further randomized clinical trials with larger follow-ups and samples, are needed to gain a clearer understanding of the local and systemic factors that interfere in the ARP and all parameters that contribute to its success. More efforts should be directed to define a standard clinical protocol and to be able to identify the ideal grafting materials.

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Roso, Melissa. "O potencial terapêutico da tecnologia PRGF na cicatrização dos tecidos moles após extração dentária." Master's thesis, 2017. http://hdl.handle.net/10284/6120.

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A tecnologia PRGF (plasma rico em fatores de crescimento) baseia-se no estudo detalhado do uso da formulação e ativação de um preparado autógeno rico em plaquetas que, tem como característica principal, a fácil utilização e a biocompatibilidade. O estudo profundo das propriedades intrínsecas das plaquetas, juntamente com um protocolo com concentração de plaquetas, ativação e liberação cinética, permitiu o desenvolvimento de uma tecnologia muito versátil e com enorme potencial terapêutico. O presente trabalho tem como objetivo, através de uma minuciosa revisão da literatura demonstrar que a PRGF apresenta resultados promissores no processo de cicatrização tecidual, demonstrando um valor em média inferior de dor, edema facial, maior volume alveolar residual, comprovando assim as suas capacidades regenerativas e indicando esta terapia como um possível modo de melhorar os índices de morbilidade pós operatória dos pacientes após a extração dentária.
PRGF technology is based on the detailed study of the use, formulation and activation of a platelet-rich autogenic preparation with the main characteristic of easy use and biocom-patibility. The deep study of the intrinsic properties of platelets, together with a protocol with platelet concentration, activation and kinetic release, allowed the development of a very ver-satile technology with enormous therapeutic potential. The objective of the present study was to review the literature to demonstrate that PRGF presents promising results during the tissue healing process, showing a lower mean value of pain, facial edema, greater alveolar volume residual, attesting its regenerative abili-ties, indicating this therapy as a possible way to improve postoperative morbidity rates after dental extraction.

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Blem, Galina. "Bestimmung der relativen Kieferknochendichte mittels digitalen Messverfahrens nach Defektauffüllungen mit ß-TCP unter Berücksichtigung der klinischen Verläufe." Doctoral thesis, 2018. http://hdl.handle.net/11858/00-1735-0000-002E-E363-D.

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Chang, Yun-Hsiang, and 張雲翔. "A Perspective of State and Society Relations on The Taiwan Military Dependent’s Villages’ Culture Preservation." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/07325480128740572632.

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碩士
國立臺灣大學
國家發展研究所
97
This paper, with the historical transformation of the state and society approach, examines the Taiwan military dependent’s villages’ (MDVs) culture preservation and its corresponding governmental policy in the year of 2006 and 2007. First, it analyzes the concept of MDVs’ culture preservation and its historical origin. Next, it discusses the MDVs’ culture preservation related state departments’ historical development, including The Ministry of National Defense’s (MND) the MDV development policy, and independent operation The Council for Cultural Affairs (CCA) after1970. Finally, it returns to the discussion of the MDVs’ culture preservation in the years of 2006 and 2007, the analysis of the background and the growth of the MDVs’ culture preservation related social and cultural groupings, and the governmental policy including MND, CCA, and The Legislative Yuan, for dealing with lobby. In view of the MDVs’ history, the author applies the transformation of the state and society analysis method , the states and societies where states includes both the Republic of China and Japan, and societies included mainland China and Taiwan society. Taiwan MDVs is the end product of interweaves among the above four essential factors, and later develops its unique multicultural characteristic. The study of Taiwan MDVs’ cultural preservation entails the investigation in three parts: the cultural crisis facing the Taiwan MDVs’ residents, the consensus of the cultural issue among Taiwan society, as well as the rise of NGOs/NPOs within the state and society’s structure of interaction. Next, the author studies the interactions among national organizations including inter-ministerial working group “MDVs’ cultural preservation working group”, MND, CCA, and Cultural Affairs Bureau in local governments. Through this research, it is believed that the relationship between MND and CCA is negotiational, because those two departments have different the state and society relations and its own network. Thus, MND and CCA are dealing with Taiwan MDVs’ cultural in an entirely different manner. Nevertheless, the MDVs’ cultural preservation working group becomes a platform for coordination among different groups, and it also evolved as a stage for negotiation. Moreover, by examining the development of the MDVs’ cultural preservation in 2006 and 2007, it is believed that the preservation work is expanded by NGOs/NPOs, MDVs’ cultural grouping, and community culture grouping where each of these three groups plays its own roles. Thus, it is not one single but several social groupings involving in this work, and result in multicultural development. Meanwhile, the state departments including MND, CCA are working with these three groups mentioned above in their own ways to respond to the social need of MDV’s cultural preservation. To sum up, it is concluded that: 1. The culture of MDVs in Taiwan has been transformed into a multicultural development that is influenced by the historical transformation of the state and society. 2. The preservation work of MDVs’ culture is being carrying out by various social groupings not just limited to the residents of MDVs. 3. It’s observed the idea of “culture preservation” emerged earlier than the idea of “the preservation of MDVs’ culture” in relation to the development of MDVs’ culture preservation. 4. The state is not an embodiment, because departments have different the state and society relations and its own network. 5. The policy of MDVs’ rebuilding resulted in double effects, including the vanishing of traditional MDVs’ cultural vessel, and the interaction among multi-ethnic groups. Therefore, to meet the trend of post-modern society, the author suggested that the development of MDVs’ cultural preservation requires the connection between CCA and NGOs/NPOs and the integration of different types of social groupings and the state departments.

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wan-ti, Hung, and 洪琬諦. "Taiwan Society , Eco-preservation and Art-making : by the Enthusiastic Phenomenon of Black-faced Spoonbill .n." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/90143006948440474202.

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碩士
臺北市立師範學院
視覺藝術研究所
89
Taipei Municipal Teachers College Graduate School of Visual Arts Abstract of Master’s Paper This is a text about art world form a connecting link with socialcultural circumstances, that is, lifeworld. This text urges what sort of bodies to ponder and to image when facing to the everyday conditions, such as huge press report influences and the ambiguous development in eco-art. In the lifeworld, it influences our sense of self, our belief system, our individuality and our status as social beings. Through the subject, it provides opportunities to under through what happen to this land, to observe the group of people and to experience life phenomenon. It makes a beginning on a phenomenon that we seem to have the enthusiasm in favor of Black-faced spoonbill. Thereby showing the lost meaning of eco-art as a start point of creation. According to the self exists, I compete for self-attention with a plethora of other images. The differences hinges on a culture of perception.

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Abdul, Kadir Suzaina. "Traditional Islamic society and the state in Indonesia the Nahdlatul Ulama, political accommodation and the preservation of autonomy /." 1999. http://catalog.hathitrust.org/api/volumes/oclc/42725390.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1999.
Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 397-408).

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Chang, Ming-Chuan, and 張明川. "A Study of Mazu Culture Preservation and Inheritance -- An Example of One Hundred Years of Mazu Society-Gods in the Platform of Taichung City." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/5993b3.

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碩士
國立暨南國際大學
管理學院經營管理碩士學位學程碩士在職專班
106
In recent years, there has been a wave of religious blight in Taiwan. However, behind the activities, most people are mostly interested in activities rather than in religion itself. As a result, more religious activities are mere formality, and religious and cultural There is no real benefit to the inheritance. This research explores the content of the activity and the participation of the public. We hope that the study obtained will provide follow-up related references and can continuously attract the participation of the public to achieve substantive cultural education. This will preserve cultural preservation and Inheritance dedication. In this study, we will introduce the history of the Mazu culture through the activity of " A Mazu Gathering for Centuries - The Gods Guard Taiwan", and observe the people's interests, discussing the preservation and inheritance of the culture of Mazu, and taking it as a follow-up related activity.

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Curtis, Robyn. "English Women and the Late-Nineteenth Century Open Space Movement." Phd thesis, 2016. http://hdl.handle.net/1885/111773.

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During the second half of the nineteenth century, England became the most industrialised and urbanised nation on earth. An expanding population and growing manufacturing drove development on any available space. Yet this same period saw the origins of a movement that would lead to the preservation and creation of green open spaces across the country. Beginning in 1865, social reforming groups sought to stop the sale and development of open spaces near metropolitan centres. Over the next thirty years, new national organisations worked to protect and develop a variety of open spaces around the country. In the process, participants challenged traditional land ownership, class obligations and gender roles. There has been very little scholarship examining the work of the open space organisations; nor has there been any previous analysis of the specific membership demographics of these important groups. This thesis documents and examines the four organisations that formed the heart of the open space movement (the Commons Preservation Society, the Kyrle Society, the Metropolitan Public Gardens Association and the National Trust). It demonstrates connections between philanthropy, gender and space that have not been explored previously. The Parliamentary Archives, London Metropolitan Archives, Guildhall Library Archives and the archives of the National Trust provided a wealth of material, including minutes, publications, newspaper cuttings and personal letters. My thesis focuses particularly on the many women activists who contributed to the achievements and philosophy of the open space movement. Unusually, women undertook significant public roles in the movement. Their participation engendered personal, professional and political advancement for their sex. My analysis illuminates the numerous motivations behind Victorian philanthropy and expands the picture of Victorian society. Further, it analyses the variety of motivations that prompted the movement’s ethos, as well as exploring the range of language used by supporters in their descriptions of the ‘natural’ world. This research highlights a significant, gendered turning point in the appreciation of conservation, preservation and the importance of open spaces in England.

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Ward, Lucina. "A translation of a translation: Dissemination of the Arundel Society’s chromolithographs." Phd thesis, 2016. http://hdl.handle.net/1885/101935.

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The thesis casts new light on the activities of the London-based Arundel Society (1848–1897). It examines the watercolours and chromolithographs produced for the Society made after pre-Renaissance frescoes and Northern altarpieces, the discourse around them, and the ways the prints were collected by organisations and individual subscribers. The Society’s commercial and ideological strategies, its didactic and archival programs, as well as the multi-faceted nature of its authorship are analysed. Using the notion of translation, this thesis explores how mediation affects the reception and meaning of a work of art. The Arundel Society, or Society for Promoting the Knowledge of Art, was one of the first entities to issue high-quality colour reproductions of works of art. Through an investigation of the impact of these colour images on art writing, and the ways in which they helped give visual form to ideas about art, this thesis proposes new value for the Society’s publications. The prints, sculptural casts and texts issued over fifty years were an important contribution to art history in a period when the discipline was developing; they were distributed around the world, bringing popular awareness to the art of earlier times. By examining subscriber lists and exploring the connections between the Society’s members, this thesis demonstrates the ubiquity of the chromolithographs. By considering the prints in a range of domestic and religious spheres, within museums and other institutional contexts, the thesis challenges the idea that reproductive prints are by nature unilateral and poses further complexities about the original, its image and the viewer—it asks questions about what happens if works of art look back. This thesis is the first to examine the Arundel Society’s contribution to a nascent art history and only the second, since Tanya Ledger’s more than forty years ago, to assess its activities in depth. Initially the Society aimed to record and spread knowledge of important monuments. Later it placed greater emphasis on recording works of art to which general access was difficult, and those threatened by decay or destruction; the function of the watercolours and prints as a ‘condition report’ was recognised at the time. In 1860s and 1870s, at the height of the Society’s popularity, the chromolithographs were also used as home furnishings, while in various churches they remain as items for devotion. By surveying extant holdings, this thesis assesses the role of the Society’s publications in the development of museum collections in Britain, the colonies and further afield, and reconsiders the possibilities for these works in the twenty-first century.

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Dissertations / Theses on the topic 'Socket preservation'

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