Dissertations / Theses: 'Dental studies'

1

Tomko, Craig. "Studies in Dental Radiography." Thesis, Faculty of Dentistry, 1985. http://hdl.handle.net/2123/4278.

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Ablal, Manal Ahmed. "Investigations on dental erosion and dental abrasion and related studies." Thesis, University of Liverpool, 2011. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.569890.

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Dental erosion has increased in prevalence over the last decades. The wider availability and frequent consumption of acidic soft drinks and other acidic substances is thought to be one of the main aetiological factors. It is also well established that this frequent exposure of dental hard tissue surfaces to such acidic attacks renders the outermost enamel layer softened and readily susceptible to be rubbed away by mechanical forces. While most of the studies emphasised on the role of toothbrushing, the effect of oral musculature, especially the tongue, is considered to play a major part in abrading pre - eroded enamel surfaces. Despite the attempts to in vitro simulate tongue abrasion; there is a lack in the literature regarding its role as a causative factor in tooth surface loss. The work presented in this thesis is divided into six chapters. The first chapter includes a general review on tooth wear, enamel erosion and abrasion in particular, referring to the various techniques commonly used to quantify enamel mineral and surface loss. Chapter 2 investigates the erosive effect of some commercially available alcoholic beverages (alcopops) on enamel surfaces. The results from that study showed that alcopops have a significant potential to cause erosion similar to that of orange juice. Further, in the same chapter, a group of dental materials commonly used to mount tooth specimens in erosion studies were examined for their fluorescence properties. It was found that some of those materials exhibited fluorescence activity that affected the quality of images using equipments such as quantitative light - induced fluorescence. Chapter 3 demonstrates that the application of tooth whitening products is not without risking enamel surfaces to undergo erosion and that chlorine dioxide bleaching products, although to a lesser extent, can cause surface demineralisation similar to that caused by hydrogen peroxide. In chapter 4, the effect of simulated tongue abrasion on pre - eroded enamel surfaces is investigated over different periods of erosion and abrasion cycles. Results from that study revealed a significant amount of mineral and surface loss after the application of tongue simulated movements particularly when erosion times were prolonged. Chapter 5 describes an in vitro study where the super saturation of artificial saliva with calcium ions has greater remineralisation properties than the specially formulated Pronamel® mouth wash, deionised water and modified artificial saliva without calcium. The mouthwash has superior remineralisation effect while the two latter solutions, particularly the modified artificial saliva without calcium, caused the greatest mineral loss and lesion depth. Chapter 6 embraces two studies; an in situ part investigating the effect of tongue abrasion on pre - eroded enamel surfaces in addition to an in vitro pilot study investigating the period required for those eroded surfaces to be physically lost to form craters. The findings from the in situ study shows that short and cyclic exposure of enamel specimens to acidic drinks followed by mechanical abrasion by the tongue results in an increased mineral and surface loss. This effect was more recognised on specimens localised opposite to the upper anterior teeth. Also, labial and palatal enamel surfaces have similar mineral and surface loss. Enamel craters formed after as early as 1 week and showed a significant depth after 4 weeks of exposure to orange juice. In conclusion, it has been shown that the tongue could exert an amount of pressure sufficient to remove pre - eroded enamel surfaces.

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Anstice, Helen Mary. "Studies on light-cured dental cements." Thesis, Brunel University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336150.

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Hume, Wyatt Roderic. "Studies on the pharmacology and toxicology of materials applied to dentine /." Title page, contents and abstract only, 1988. http://web4.library.adelaide.edu.au/theses/09D/09dh922.pdf.

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Sarrafpour, Babak. "Studies in tooth movement." Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/9746.

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This thesis describes work investigating the mechanisms that result in the eruption of teeth out of the jaws into the mouth, as well as the post-eruptive continuous emergence of teeth once they have entered the mouth. First Chapter summarizes relevant literature on the formation and movement of teeth, and identifies difficulties with the current widely accepted concept of an 'eruptive force' driving teeth into the mouth. Chapter 2 outlines relevant biomechanical principles for Finite Element Analysis (FEA) and by FEA explores the possible role of functional stress in driving continuous post-eruptive emergence of teeth. Data in Chapter 3 support a new hypothesis for tooth eruption, in which the follicular soft tissues detect bite-force-induced bone-strain, and direct bone remodeling at the inner surface of the surrounding bony crypt, with the effect of enabling tooth eruption into the mouth. Consequent to work described in Chapter 3, was a need to further characterize mechanosensor activity in dental follicle cells, to that end, Chapter 4 outlines the relevant literature and describes experimental work examining the possible mechanosensor response of cultured dental follicle cells isolated from tissue obtained from extracted wisdom teeth.

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Shabanian-Borojeni, Mitra. "Wear studies of enamel and some restorative materials." Title page, contents and summary only, 2001. http://web4.library.adelaide.edu.au/theses/09PH/09phs5241.pdf.

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Includes bibliographical references (leaves [1-20]). A systematic analysis of wear involving the in vitro analysis of the wear of standard composite resin and glass ionomer cements restorations under controlled conditions; and, the qualitative and quantitative investigation of wear over a range of pH's and loads which might be encountered clinically in order to develop a "wear map" of the micromorphology of wearing teeth and restorations and a systematic modeling of wear rates.

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Padipatvuthikul, Pavinee. "Fatigue studies on dental composites and bonding systems." Thesis, University of Liverpool, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485845.

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Introduction: Adhesion has become an important concept in modern restorative dentistry. It offers the ability to bond materials to the tooth without invasive tooth preparation. Numerous in-vitro strength tests have been used to determine the bond strength of adhesive systems. However, because the occlusal forces applied to. a restoration are complex, and made up of a combination of forces, no one test can satisfactorily predict the in-vivo behavior of an adhesive system. The majority of bond strength studies have used monotonic tests to assess the bond strength of materials and between the materials and the tooth. These tests are expedient, but do not simulate the cyclic forces that operate in the mouth. Tests that characterize this type of . stress are called fatigue tests. Fatigue can result in wear and fracture of materials or bonds. .Objectives: To investigate fatigue behavior of modern resin composites and resinbonded joints of both metal to enamel and ceramic to enamel. The main approaches to fatigue assessment, 'Fatigue Limit' and 'Fatigue Life'were compared Materials and Methods: Surface effects of fatigue One hundred and eighty samples of two historical composites1-2 and seven modern composites3 - 9 were subjected to 2000 stress cycles between 0 and 120N or 0 and 400N. Surface damage was measured as the diameter of the fatigue scar and subsurface damage was determined by silver nitrate staining. The hardness of both the surface and subsurface was also determined. Fracture Composite to composite Two hundred and twenty composite disks were fabricated using three materials.7 Ã‚Â• 9 After one day, one week, four weeks, and twelve weeks, fifty-five specimens of each material were removed from' water and divided into three groups of fifteen and one group of ten. Each group of samples was treated with one of three bonding systems10- 12 before adding a sec~nd increment. For each material, ten samples were subjected to Shear test in a Universal Testing Machine13 (CHS= 50 mmlmin). The fatigue limit test using fifteen samples per group were used to determine the fatigue limit using the staircase method (Draughn 1979). Metal or Ceramic to Enamel (via resin) Three hundred and forty-two discs of Ni/Cr-alloy14 were cast and treated by either sandblasting with aluminium oxide, or by sandblasting followed by electrolytic-etching in HCI. The disks were bonded to etched enamel with one of three dental bonding systems.1S - 17 One hundred and seventy-one ceramic disks were fabricated by sintering ceramic powder.18 One surface of each disk was etched with porcelain etching-gel19 for fifteen minutes and sandblasted with 50 J.Im A120 3. The prepared disks were then divided into three groups and were bonded to etched enamel using one of three dental bonding systems.1S - 17 Ten specimens of each group were sUbjected to a shear bond test (CHS 50 mm/min) and seventeen specimens of each group to a staircase fatigue test to determine the fatigue limit of the bonds. The remaining specimens from each group were placed in the custom made fatigue testing machine and allowed to cycle to failure between 0-20 kg, 0-10 kg or 0-5 kg (n=10 per load). The number of cycles at failure was analysed by Weibull statistics to determine the fatigue life Results: The surface studies in composites indicated that both surface and subsurface damage increased with increasing load. In general, small-particle composites experienced less damage than the large particle materials. At 12 kg, the surface damage was inversely proportional to the surface hardness, whereas at 40 kg, it was proportional to the subsurface hardness. At both loads, subsurface damage was directly proportion to subsurface hardness. For the composite to composite bonds, the fatigue limit values were approximately 30% of the shear bond strength values and the values were significantly different (p<0.01) for all nine groups. For metal to enamel bonds, the fatigue limit (after 5000 cycles) varied between 10.7 and 16.8 MPa compared to 21.3 and 48 MPa for the shear strength. The values for all groups was significantly different (p<0.001). There was no significant correlation between the shear bond strength and the fatigue limit values (Pearson Correlation P<0.01). For all groups, the threshold stress at which the samples equid withstand over one million cycles (fatigue Life) was 2.5 MPa. For ceramic to enamel bonds, the fatigue limit (after 5000 cycles) varied between 11.41 and 13.74 MPa compared to 21.3 and 48 MPa for the shear strength. The values for all groups were significantly differ~nt (p<0.001). There was no significa~t correlation between the shear bond strength and the fatigue limit values (Pearson Correlation P<0.001). For all groups, the threshold stress at which the samples could withstand over one million cycles (fatigue Life) was 2.5 MPa. Conclusion: Fatigue damage to the surface and subsurface of composite was related to the hardness of the material. The values of the fatigue limit were significantly lower than the shear bond strength values. There was no correlation between fatigue limit and shear bond strength. The long term safety limit for resin bonded joints to enamel is 2.5 MPa. Neither the shear test, nor the fatigue limit test was an accurate predictor of the long-term fatigue behaviour of resin-bonded restorations. A fatigue limit test using 100,000 cycles may be a useful predictor of the fatigue life which, in these studies, was half of the fatigue limit at 100, 000 cycles but the only reliable test is to test to failure. The data presented in this thesis indicated that the shear bond strength is not pred!ctor of long term failure. lClearfil Posterior, Cavex. Holland. 20cclusin. ICI. UK. 3Concise, 3M. USA. 4Admira, VOCO, Germany. 5Grandio. VOCO. Germany. 6Grandio Flow, VOCO, Germany. 7Spectrum, Dentsply, Germany. 8Durafill VS, Heraeus Kulzer, Germany. 9Herculite XRV, Kerr, USA. 10Prime&Bond. Dentsply, Germany. 110ptibond solo plus, Kerr, USA. 12BisGMAffEGDMA. 3M ESPE. USA. 13Nene Instruments Ltd.Ã‚Â• UK. 14yerabond II, Aalba Dent Inc., USA. 15Calibra with Prime & Bond Resin, Dentsply, Germany. 16Panavia with ED-Primers. Kuraray, Japan. 17Nexus with Optibond Solo Plus Resin, Kerr, USA. 18Vitadur Alpha, VITA Zahnfabrik. Germany. 19Porcelain Etch-it gels, American Dental Supply. USA.

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Hooghan, Tejpal Kaur. "Microstructural studies of dental amalgams using analytical transmission electron microscopy." Thesis, University of North Texas, 1997. http://catalog.hathitrust.org/api/volumes/oclc/48164912.html.

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Zaura, Egija. "Plaque stagnation sites and dental caries studies on dental biofilm and dentin demineralization in narrow grooves /." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2002. http://dare.uva.nl/document/86069.

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Silberberger, Jamie Elaine. "Reducing Dental Mercury Discharge in Missoula, Montana: Collaborative Opportunities." The University of Montana, 2007. http://etd.lib.umt.edu/theses/available/etd-05182007-144430/.

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The purpose of this paper is to provide assistance in developing a program to control the release of dental mercury amalgam in Missoula, Montana. To do this, three research components were carried out. The first consisted of a survey to determine whether Missoula dentists are following the American Dental Associations (ADA) recommended Best Management Practices (BMPs) for mercury amalgam waste. The second component involved interviewing local dentists in an effort to include their voice in the process, as well as to determine what may motivate them to comply with a dental mercury control program. The final component of research involved developing and analyzing three case studies of municipalities that have designed and implemented a successful BMP program that can be used to help guide the development of a program in Missoula.

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11

Sundin, Birgitta. "Dental caries and sugar-containing products analytical studies in teenagers /." Malmö [Sweden] : Dept. of Pedodontics, Faculty of Odontology, Lund University, 1994. http://catalog.hathitrust.org/api/volumes/oclc/32290695.html.

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12

Bäckman, T. (Tuula). "Acid-base balance, dentinogenesis and dental caries:experimental studies in rats." Doctoral thesis, University of Oulu, 1999. http://urn.fi/urn:isbn:9514253620.

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Abstract High-sucrose diet and metabolic acidosis have some similar effects on bone and they both reduce the formation of dentine. This series of experiments was conducted in order to get information about the effects of acidosis and alkalosis on dentine during primary dentinogenesis and also to ascertain if high-sucrose diet affects dentine formation via acidosis. Chronic metabolic acidosis (0.25 mol/L of NH4Cl in drinking water), chronic metabolic alkalosis (0.25 mol/L of NaHCO3 in drinking water) and chronic respiratory alkalosis (atmospheric pressure equivalent to an altitude of 3000 m) were induced in the rats immediately after weaning for 6 and 7 weeks. One subgroup from each of the main groups was fed a high-sucrose (43%) diet and one a standard maintenance diet, each ad libitum. The control groups had the same diets, but normal drinking water and atmospheric pressure. All the rats were injected with tetracycline (to mark the onset of the experiment in dentine) and inoculated orally with Streptococcus sobrinus. The acid-base status was verified by blood gas analysis at the end of the experiments. After sacrifice, fissure caries was scored with Schiff reagent and the areas of dentinal lesions and tetracycline-marked new dentine were measured from sagittally sectioned mandibular molars. The mineral elements (Ca, Mg, F, Na, P and total mineral contents) of the dentine formed before and during the experiment were measured with an electron probe microanalyzer. With the high-sucrose diet, respiratory alkalosis and metabolic acidosis promoted the initiation and progression of caries while metabolic alkalosis slightly retarded it. With the standard diet, all the experimental conditions slowed the rate of dentine formation and metabolic acidosis had the most pronounced effect. The mineral analysis revealed a totally different pattern of mineralization when the rats with metabolic acidosis (increased calcium and total mineral content) were compared to the previously reported rats with a high-sucrose diet (decreased calcium and total mineral content). Besides this, metabolic alkalosis did not correct the effects of the dietary sucrose on dentine formation and blood gas analysis showed no acid-base disturbances in the sucrose diet group. Therefore, a high amount of sucrose in the diet slows the rate of dentine formation and reduces the ability of teeth to resist caries attack by mechanisms different from those of metabolic acidosis. Nevertheless, metabolic acidosis was found to be the most harmful state of disturbance in acid-base balance for the teeth of young rats, especially with a diet containing a high amount of sucrose.

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Stecksén-Blicks, Christina. "Epidemiological studies of dental caries in groups of Swedish children." Doctoral thesis, Umeå universitet, Pedodonti, 1986. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-100548.

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In a cross-sectional study the extent and distribution of dental caries was studied in 817 children, 4, 8 and 13 years old in three areas inSweden. The importance of dietary habits, sugar intake, social conditions, professional dental care, oral hygiene and the use of fluorides on caries prevalence was analyzed. In a subsample, consisting of 88 8-year-olds and 91 13-year-olds the net caries increment during aone-year period was studied.In this longitudinal study, the salivary levels of lactobacllli and S. mutans were determined and correlated to sugar intake and caries increment. The cross-sectional study showed obvious differences in caries prevalence among the studied areas. These differences could mainly be explained by variations in the age from which children had received professional dental care, frequency of tooth-brushing and the use of topical fluorides. There were no differences in dietary habits or sugar intake that could explain the differences in caries prevalence among the areas studied. Examples are given of how changes in some determinants may affect the caries prevalence by means of path analysis. The longitudinal study showed that caries Increment was higher when sugar intake and meal frequency were high (> the mean value for the age group). The highest mean caries increment was found in children with high prevalence of lactobacllli and S. mutans in the saliva combined with a high sugar intake. Groups of children with high salivary levels of both Iactobac ì II i and S. mutans developed 3-4 times more caries than other children. This relation did not always exist in the Individual case. Children with a low caries Increment during one year (0-2 surfaces) brushed their teeth more often and rinsed their mouths more frequently with fluoride solution than children with a high caries increment (> 3 surfaces). The use of fluoridated toothpaste was somewhat more common, however, in the low carles increment group only in the.8-year-oIds. The gingival status was used as a measure of oral hygiene and gingivitis scores revealed statistically significant differences between groups with a low caries increment and a high carles increment (p < 0.01, p < 0.05) in the two age groups, respectively. With the variables frequency of meals, total sugar intake, salivary level of lactobacilli and S. mutans, oral hygiene and use of topical fluorides the net caries increment during one year could be correctly predicted in 79 % of the 8-year-olds and 81 % of the 13-year-olds when the children were divided Into two groups according to their net caries increment; 0-2 surfaces and > 3 surfaces.

S. 1-43: sammanfattning, s. 45-116: 5 uppsatser

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Gassner, Kanters Lina. "Assessment of professionalism within dental education: A review of studies." Thesis, Malmö högskola, Odontologiska fakulteten (OD), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-19826.

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Assessment of professionalism is a concept which has been highlighted during the last ten years. High demands from the public and from authorities combined with an increased educational interest for the concept of professionalism has led to a greater focus on ways of implementing and assessing professionalism in dental, medical and other professional educations. Many authors point out that professionalism is an essential competence, but there is a lack of and a need for a definition of professionalism within dentistry and dental education. It is recognised that professionalism is a broad concept, which calls for different methods of assessments. The aim of this paper is to identify and describe different methods of assessing professionalism within dental education and to categorise them into a blueprint. The studies are discussed out of the perspective of validity and reliability and the methods of assessment are compared to different levels of Miller’s pyramid. Literature is sparse and a mere 16 articles were found to fit the purpose of this paper. Most studies used a traditional way of assessing professionalism, even though research has shown that this way is neither sufficient nor suitable. More research is needed and the methods for assessment need to be further explored. Validity and reliability need to be put in focus, since no method of assessment has proven to be both valid and reliable.

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Stecksén-Blicks, Christina. "Epidemiological studies of dental caries in groups of Swedish children." Umeå : [s.n.], 1986. http://catalog.hathitrust.org/api/volumes/oclc/14125444.html.

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Burns, Tracy M. "Studies on the lethal photosensitisation of cariogenic bacteria." Thesis, University College London (University of London), 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247428.

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Stepter, Karmeil M. "Representation of Diversity on Entry-Level Dental Hygiene Program Websites." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1512123129198428.

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Hughes, Julie Ann. "Studies on the effects of dietary products on dental hard tissue." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324337.

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BATHOMARCO, RICARDO VIEIRA. "EXPERIMENTAL STUDIES OF DIFFERENT SURFACE TREATMENTS APPLIED TO TITANIUM DENTAL IMPLANTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=4765@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
EXÉRCITO BRASILEIRO
Apesar do titânio e suas ligas serem amplamente empregadas na implantodontia e os resultados das experiências clínicas comprovarem que estes materiais apresentaram excelente biocompatibilidade, existem dúvidas quanto às propriedades físico-químicas ideais das superfícies dos implantes de titânio para se obter uma osseointegração adequada. Todavia, os padrões para definir as propriedades superficiais dos implantes odontológicos ainda não estão definidos na literatura. Estas características são importantes, uma vez que a osseointegração é fortemente dependente da ligação das células com a superfície do implante. Este trabalho tem como objetivo analisar três processos subtrativos utilizados no tratamento da superfície de implantes osseointegráveis de titânio comercialmente puro a saber: abrasão - jateamento, erosão - ataque químico e combinação das duas. Estes métodos permitem avaliar as propriedades físicas e químicas superficiais de cilindros de titânio tratados através destes processos tais como: morfologia superficial, topografia e molhabilidade (ângulo de contato). Foi possível, também, identificar os parâmetros e métodos vinculados que otimizam as condições superficiais para este fim.
Titanium alloys are widely used in dental implants in virtue of clinical evidences of the excellent biocompatibility performance shown by this alloys. However, there are still a number of unanswered questions regarding the ideal physicochemical properties of titanium surfaces used in dental implants aiming at an appropriate integration with the bone. Furthermore, in the literature there are not still available standards defining superficial properties of dental implants. These characteristics are a fundamental importance since biocompatibility is strongly depended upon the connections between host cells and the titanium surface implant. The present work has as objective the analysis of three processes use for surface treatments of dental implants based on titanium of commercial purity, namely mechanically- induced erosion, chemical etching and the combination of both. Such methods applied to titanium cylinders, have permitted one to estimate more closely their physical and chemical surfaces properties, such as surface morphology, surface topology and contact angle (wet ability). It is also identified the factors and methods allowing to obtain the optimal surface conditions for this purpose.

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Davis, Joan Mary. "DIFFUSION OF TOBACCO DEPENDENCE EDUCATION IN DENTAL HYGIENE: TEN CASE STUDIES." OpenSIUC, 2010. https://opensiuc.lib.siu.edu/dissertations/214.

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The use of tobacco has been a known contributing factor in the development of disease and death since the 1960s. Unfortunately, evidence-based tobacco cessation protocol is still not effectively being taught in healthcare curriculum as evidenced by the lack of clinical competencies in many institutions. The purpose of this study was to gain an in-depth understanding of the process dental hygiene program directors use to adopt and implement tobacco dependence information into their curricula. Gaining a clearer idea of how and why dental hygiene faculty diffuse tobacco curriculum may inform future dissemination efforts leading to improved adoption and implementation of evidence-based information in healthcare education. A total of ten, one hour interview data sets of US dental hygiene program directors were chosen for this study. They were selected from a possible 14 interviews collected from a larger research project consisting of 32 one hour interview data sets. A case study research methodology was used to guide the collection of interviews. The Diffusion of Innovation, Five Stages in the Innovation Process in Organizations (Rogers, 2003) was used as the theoretical framework to inform the extraction of themes and patterns. The analysis of interview data revealed that all ten program directors reported a similar process of: learning about tobacco cessation, discussing the topic in a faculty meeting, deciding what class the topic should be taught, and that cessation should be a part of the clinical experience. What was not evident from these interviews was how and why the evidence-based tobacco cessation guideline was reduced from five essential elements to minimal implementation by most of the ten schools. Though the process of how dental hygiene programs learn of and implement tobacco cessation into their curriculum, further research is needed to explore how faculty make decisions on content and level of clinical competencies when new innovations are introduced into their program.

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Ramberg, Per. "Studies on d̲e̲ n̲o̲v̲o̲ plaque formation in man." Göteborg : Dept. of Periodontology, Faculty of Odontology, Göteborg University, 1995. http://books.google.com/books?id=Zko0AAAAIAAJ.

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Shen, Song, and 沈嵩. "The bacterial and yeast flora of root surface caries in elderly Chinese: clinical and in vitro studies." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31245985.

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Leao, Anna Thereza Thome. "The development of measures of dental impacts on daily living." Thesis, University College London (University of London), 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301576.

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Sundén, Pikner Solweig. "Radiographic follow-up analysis of Brånemark® dental implants /." Göteborg : Department of Oral and Maxillofacial Radiology, Institute of Odontology, University of Gothenburg, Folktandvården, Postgraduate Dental Education Center, 2008. http://hdl.handle.net/2077/10124.

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Shi, Xie-Qi. "Comparative studies of modern methods for caries detection and quantification /." Stockholm, 2001. http://diss.kib.ki.se/2001/91-628-4702-3/.

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Malinowski, Marina. "In situ studies with fluoridated milk for the remineralisation of dental enamel." Thesis, University of Leeds, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540571.

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Wassif, Hoda Sobhy. "Application of X-Ray Microtomography to Studies of Model Dental Caries Systems." Thesis, Queen Mary, University of London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.531461.

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Gustafsson, Annika. "Dental behaviour management problems among children and adolescents - a matter of understanding? studies on dental fear, personal characteristics and psychosocial cincomitants /." Göteborg : The Sahlgrenska Academy, University of Gothenburg, 2010. http://gupea.ub.gu.se/dspace/handle/2077/21474.

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Dotson, Meryle Akeara. "Postnatal Dental Mineralization: a Comparative Analysis of Dental Development Among Contemporary Populations of the Southeastern United States." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3079.

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Due to the strong genetic component of dental development, research has shown that mineralization patterns of the human dentition are relatively buffered against environmental influences that normally affect bone growth and development. It is because of this resistance to environmental factors and the continuous growth of the permanent dentition throughout childhood and adolescence that the evaluation of dental development patterns has become the preferred method of age estimation in living and deceased children. Researchers (Harris and Mckee 1990; Tompkins 1996; Blankenship et al. 2007; Kasper et al. 2009) have suggested that the timing of dental development varies by ancestral descent and geographic populations. However, further evaluations of these perceived differences in the timing of dental development among populations are necessary as classical statistical methods result in age estimations that are biased toward the age structure of the reference population. However, the Bayesian approach is beneficial since it incorporates relevant prior knowledge into the analysis and formalizes the relationship between assumptions and conclusions (Buck et al. 1996). Therefore, the purpose of this research is to incorporate methods in Bayesian analysis to compare the timing of dental development between two contemporary populations of the Southeastern United States, as well as test the accuracy of dental development age parameters devised by Moorrees et al. (1963) on a contemporary Florida Population. For this study, 51 panoramic radiographs of individuals from a contemporary Florida population ranging in age from 7.7-20.4 years were reviewed. Statistical analyses incorporated a Bayesian approach to compare the timing of dental development for individuals comprising the contemporary Florida sample with the timing of dental development for a contemporary Middle Tennessee population by utilizing the age structure of the Middle Tennessee population as informed prior knowledge, otherwise referred to as an informed prior. Transition distributions for age, given stage of dental development, were also modeled for individuals comprising the contemporary Florida sample. The accurate observation and comparison of probability density distributions for age can serve as a noninvasive method for evaluating the probability of whether or not an unknown individual is a particular age, given the stage of dental development. Results of this research indicate that there is a consistent underestimation of age for individuals comprising the contemporary Florida population when the age structure of the Middle Tennessee population is utilized as an informed prior. Additionally, the results of this thesis indicate that there is a consistent underestimation of age when utilizing age parameters of Moorrees et al. (1963) for the estimation of age for individuals from a contemporary Florida population. By incorporating a Bayesian approach to compare two contemporary populations of the Southeastern United States, a comprehensive analysis of the relationship between age and stage of dental development can be achieved. Therefore, the results of this thesis support Bayesian analysis as an appropriate method of evaluating perceived differences in the timing of dental development between contemporary populations. Furthermore, the results of this research are beneficial to the field of forensic anthropology as the observation of advanced stages of molar development utilizing panoramic radiographs serves as a noninvasive method in estimating age for unknown juveniles and young adults, and can also assist courts within the United States in determining whether or not an individual is legally considered a minor or an adult.

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Berglundh, Tord. "Studies on gingiva and periimplant mucosa in the dog." Göteborg : Faculty of Odontology, University of Göteborg, 1993. http://catalog.hathitrust.org/api/volumes/oclc/29343307.html.

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Aaltonen, Antti S. "Natural immunity in dental caries longitudinal studies of serum and salivary antibodies reactive with Streptococcus mutans in young children in relation to dental caries and some maternal factors /." Turku, Finland : University of Turku, Institute of Dentistry, 1989. http://catalog.hathitrust.org/api/volumes/oclc/20115011.html.

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32

Foster, Louise V. "Studies concerning the diagnosis and progression of caries in adults." Thesis, University of Bristol, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319090.

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Al-Khateeb, Susan. "Studies on the remineralization of white spot lesions : longitudinal assessment with quantitative light-induced fluorescence /." Stockholm, 1998. http://diss.kib.ki.se/1998/19980331alkh.

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Choi, Su-Heui. "The mentalis muscle and postural vertical dimension." Thesis, Faculty of Dentistry, 2006. http://hdl.handle.net/2123/4289.

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Yee, Jason A. "The rate of tooth movement and dentoalveolar stress under heavy and light continuous orthodontic forces studied with a three dimensional finite element model." Thesis, Faculty of Dentistry, 2007. http://hdl.handle.net/2123/4296.

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Adams, A. M. "In vitro biocompatibility studies of dental restorative materials using human periodontal ligament cells." Thesis, University of Newcastle Upon Tyne, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287331.

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Eisenburger, Michael Gregor Walter. "Studies on dental erosion and attrition using a new ultrasonication and profilometry technique." Thesis, University of Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247553.

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Amaechi, Bennett Tochukwu. "Studies relating to the development and progression of enamel lesions : caries and erosion." Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366453.

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Raskin, Sarah E. "Decayed, missing, and filled| Subjectivity and the dental safety net in central Appalachia." Thesis, The University of Arizona, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3725587.

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Abstract:

Dental caries, popularly known as tooth decay or cavities, is among the world’s most common health problems. When caught early, it is also one of the most easily resolvable. Yet, advanced decay is a trenchant marker of social inequality and a major contributor to the maldistribution of physical pain and psychosocial suffering. Why? Access to dental care within the U.S. model of fee-for-service dental private practice follows existing lines of social stratification. Dental disparities, a term that calls attention to the relationships between maldistributed disease and maldistributed care, reflect deep ontological, moral, and political differences about responsibility for the prevention and treatment of dental disease, the quality and distribution of dental care, and even what constitutes health and well-being. What kinds of sociopolitical and moral negotiations constitute and transpire around dental disparities? How do these negotiations shape the experiences of patients and providers, and how do their experiences shape these negotiations? What can an ethnography of the dental safety net – a complex, fragile, and unpredictable network of treatment opportunities for low-income families – tell us about health governance more broadly? These are some of the questions that drive my research.

In this dissertation, I explore how the sociopolitical relations of dental disparities are enacted through the dental safety net. Drawing on fifteen months of ethnographic research in clinical and community settings in central Appalachia, a region that has come to symbolize the dental crisis in the popular imagination, I show how the dental safety net exemplifies health governance in a neoliberal milieu. A fragmented system characterized by a discontinuity that starkly contrasts the model of health care generally advocated in both private and public medical systems, I argue that the dental safety net in far southwest Virginia does not merely fail to relieve the suffering of marginalized people but also can produce it. For example, the constitution of publicly-funded and charitable dental care can serve to routinize and even incentivize excess extractions among low-income adults while exempting preventive or restorative care. In addition to its effects on underserved patients, the dental safety net is a site through the fraught and contradictory relationships of dental providers and the sociopolitical stakes of the pursuit of oral health equity can be understood. For example, the flexible teamwork arrangements prized in private practice, when posited for the dental safety net, are often interpreted by dentists as risks of pluralization and threats to professional hierarchy that must be contained through legislative means. Borrowing from the crude classificatory scheme used to screen teeth quickly, I show how the dental safety net is decayed, as it bears the wear of overuse beyond maintenance; missing, or better described as an absence than a presence; and filled, like a cavitated tooth or a canaled dental root, with manufactured solutions of variable standards and longevity.

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Cheng, Linda Lam. "Repair of root resorption four and eight weeks following the application of continuous light and heavy forces for four weeks: micro-ct and histology studies." Thesis, Faculty of Dentistry, 2007. http://hdl.handle.net/2123/4308.

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Ballard, Darin J. "Properties of root cementum: part 11 continuous versus intermittent controlled orthodontic forces on root resorption. a micro-ct study." Thesis, Faculty of Dentistry, 2006. http://hdl.handle.net/2123/4307.

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Siddiqui, Samera. "Crystallographic and microstructural studies of dental enamel using synchrotron X-ray diffraction and complementary techniques." Thesis, Queen Mary, University of London, 2014. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8987.

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The complex microstructure and properties of dental enamel have been studied for decades using a variety of quantitative and qualitative techniques in order to gain a greater depth of understanding behind the chemical and physical processes that are associated with the formation and destruction of this biological apatite. Dental enamel is composed of highly ordered carbonated hydroxyapatite crystals which, together with its small organic component, are responsible for its mechanical strength, allowing it to serve its functional purpose. Environmental changes at any stage of the biomineralisation process or post eruption can disrupt the orientation and alter the structure and function, which can have detrimental clinical effects. The aim of this study is to understand and characterise the structural and crystallographic properties of disrupted enamel, and compare this to healthy unaffected tissue. Enamel affected by the genetic disorder, Amelogenesis Imperfecta, alongside enamel disrupted by dissolution and caries were studied using Synchrotron X-ray diffraction, 3D X-ray Microtomography, and Scanning Electron Microscopy techniques to relate these features to the clinically observed characteristics; to the chemistry; and to the known genetics of the tooth. Synchrotron radiation was used to map changes in preferred orientation, while the corresponding mineral density distributions were seen by using an in house developed, non-destructive microtomography system. Structural information on dental enamel at the crystallographic and micron length scales can benefit a variety of different disciplines. This project has the potential to inform early diagnosis, develop a tool for an early recognition of progressive or highly variable medical conditions, and design potential treatment regimes. The comparison of affected enamel to that of healthy enamel will provide a unique opportunity to identify the developmental pathways required for normal tooth development and give insights into the basic principles underlying mammalian biomineralisation.

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Millett, Declan T. "In vitro and in vivo studies of glass ionomer cements in the bonding and banding of orthodonotic attachments." Thesis, University of Newcastle Upon Tyne, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384894.

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Higham, S. M. "Studies in the relationship between pH, carbohydrate and nitrogen metabolism in human dental plaque." Thesis, University of Liverpool, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382064.

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Abdullah, Ahmed. "In vitro and in situ studies to investigate the erosion of human dental tissues." Thesis, University of Leeds, 2009. http://etheses.whiterose.ac.uk/11292/.

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Yeung, Chak-yan Yvette Jasmine, and 揚澤茵. "Patient satisfaction, and behaviours of dental service consumers and providers under two fee-paying systems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31954200.

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Gabre, Pia. "Studies on oral health in mentally retarded adults /." Stockholm, 2000. http://diss.kib.ki.se/2000/91-628-4525-x/.

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48

Housley, Jeffrey A. "Stability of transverse expansion in the mandibular dental arch." Oklahoma City : [s.n.], 2002. http://library.ouhsc.edu/epub/theses/Housley-Jeffrey-A.pdf.

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Macalusco, P. James. "Descriptions and comparative studies of the hominin dental remains from Dmanisi, Georgia 1991-2002 collections /." Diss., Online access via UMI:, 2006.

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50

Townsend, Grant Clement. "Genetic studies of morphological variation in the human dentition /." Title page, contents, preface and overview only, 1994. http://web4.library.adelaide.edu.au/theses/09D/09dt748.pdf.

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Dissertations / Theses on the topic 'Dental studies'

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