Relevant bibliographies by topics / Mandible

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Academic literature on the topic 'Mandible'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Mandible"

1

Kingsmill, V. J., C. M. Gray, D. R. Moles, and A. Boyde. "Cortical Vascular Canals in Human Mandible and Other Bones." Journal of Dental Research 86, no. 4 (April 2007): 368–72. http://dx.doi.org/10.1177/154405910708600413.

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The human mandible is highly mineralized. We hypothesized that this is related to the local vascularity of the bone. This could not be examined directly, but, as a surrogate, intracortical vascular canal spaces of the human mandible were studied so that we could determine possible relationships with age, gender, location, dental status, and tissue mineralization. Canal numbers, area, and volume fraction were calculated from quantitative backscattered electron images of human mandibles aged 16–96 years. Data were compared with calvaria, maxilla, lumbar vertebra, femoral neck, and iliac crest. In the mandible, the buccal aspect of the midline was the most porous, the canals being larger and more numerous. The cortical porosity in the posterior of partially dentate mandibles was significantly greater than that of either dentate or edentate mandibles, and there was a significant increase in the size of canals in the mandible with increasing age. Female mandibles had more porous cortices. No relationship was found between cortical porosity and the degree of bone mineralization.
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Curcio, Ricardo, Guilherme Luis Perin, Israel Chilvarquer, Maria Lucia Borri, and Sergio Ajzen. "Use of models in surgical predictability of oral rehabilitations." Acta Cirurgica Brasileira 22, no. 5 (October 2007): 387–95. http://dx.doi.org/10.1590/s0102-86502007000500011.

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PURPOSE: To evaluate the rehabilitation of edentulous mandibles with osseous integrated implants in immediate loading, using models in reverse planning. METHODS: A prospective study was performed on 14 patients with a total of 56 implants placed. It was proposed a technique for the rehabilitation of edentulous mandible with osseous integrated implants of immediate loading, using anatomical replicas derived from computerized tomography scan linked to the rapid prototyping technique of stereolithography in reverse planning, elaborating the definitive fixed prosthesis, with rigid union of the implants on the same day. The patients' mandible models were divided in two groups. In the first one, there were patients with edentulous mandible models and with models elaborated after exodontics procedures (Group 1). In the second (Group 2), patients with dentulous mandible models, which allow an evaluation of difficulty in the surgery. RESULTS: The proposed technique using anatomical models for the personalization of mandibles in immediate loading had 100% of less difficulty in the adaptation of the surgery guide while the dentulous models had 83,3% of more difficulty. CONCLUSION: The proposed technique using the mandible models in the rehabilitation of mandibles is feasible.
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Ingawale, Shirish M., Deepak G. Krishnan, and Tarun Goswami. "Validation of Experimental and Finite Element Biomechanical Evaluation of Human Cadaveric Mandibles." Lubricants 10, no. 8 (July 25, 2022): 169. http://dx.doi.org/10.3390/lubricants10080169.

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Background: Biomechanical analysis of human mandible is important not only to understand mechanical behavior and structural properties, but also to diagnose and develop treatment options for mandibular disorders. Therefore, the objective of this research was to generate analytical and experimental data on mandibles, construct custom 3D models, and compare the analytically derived maximum strains with strain gage data in five areas of interest for each mandible. Methods: We investigated the surface strains in the cadaveric human mandibles under different configurations of cyclic compressive loads in an experimental setting and compared these experimental strain data with results derived from computational finite element analysis (FEA), accurately replicating the experiments. Strains on the surface of each mandible were measured with strain gauges, and subsequently a subject-specific finite element (FE) volume mesh was generated from computed tomography (CT) scans of each mandible. Strain patterns of each mandible were derived from the FEA simulating the experimental setup and matched with the experimental data. Findings: Analysis of experimental data showed that strain as measured at the condylar locations was significantly different from those at other locations on the mandible, and that the sex and age of the subject did not have a significant correlation with the strain. Comparing the FE numerical predictions with the experimental data, we found a good statistical correlation and statistical agreement between in-vitro measurements and FE results. Interpretation: The study demonstrates that our methodology of generating subject-specific FE models is a valid and accurate, non-invasive method to evaluate the complex biomechanical behavior of human mandibles.
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Sugiyo, Paul, and Heriyanti Amalia Kusuma. "Obturator Definitive Mandibula Post Hemimandibulectomy Sinistra." Majalah Kedokteran Gigi Indonesia 19, no. 2 (December 31, 2012): 158. http://dx.doi.org/10.22146/majkedgiind.15541.

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Latar Belakang. Operasi bedah pemotongan mandibula pada kasus tumor jinak maupun tumor ganas dapat menyebabkan deviasi mandibula. Tindakan perawatan bedah tergantung pada lokasi dan perluasan tumor mandibula, tindakan perawatan bedah tersebut meliputi bedah marginal, segmental, hemimandibulectomy, dan total mandibulectomy. Tujuan. Makalah ini menjelaskan tentang perawatan rehabilitasi dengan obturator definitive mandibula. Para klinisi harus menunggu masa penyembuhan yang sempurna sebelum disarankan untuk dibuatkan onturator definitive mandibula. Sejak awal penyembuhan diperlukan intervensi prostodontis untuk mencegah deviasi mandibula. Protesa ini membantu pergerakan mandibula secara normal tanpa terjadi penyimpangan pada fungsi bicara dan pengunyahan. Laporan Kasus. Pada bulan Maret 2012, pasien laki-laki, berumur 46 tahun datang ke RSGM Bagian Prostodonsia atas rujukan dari RS. Dr. Sardjito Bagian Bedah Mulut setelah dilakukan operasi tumor ameloblastoma mandibula sinistra (post hemimandibulectomy mandibula sinistra) dengan pemasangan plat rekonstruksi tiga bulan sebelumnya untuk dibuatkan obturator definitive mandibula. Pasien mengeluh bibir bawah sebelah kiri sering tergigit, fungsi bicara, fungsi pengunyahan, dan penampilannya terganggu. Hasil. Setelah dilakukan perawatan dengan memakai obturator definitive mandibula dalam kurun waktu 8 bulan, hingga saat ini hasil perawatan ini dapat mengembalikan fungsi bicara, fungsi pengunyahan, dan fungsi estetik sehingga pasien merasa lebih nyaman dan percaya diri. Kesimpulan. Deviasi mandibula setelah operasi hemimandibulectomy diatasi dengan bedah rekonstruksi menggunakan plat rekonstruksi, kemudian segera setelah penyembuhan perlu melibatkan prostodontis untuk pemasangan obturator definitive mandibula. Background. Surgical restion of the mandible due to presence of benign or malignant tumor is the common cause of the mandibular deviation. Depending upon the location and extent of the tumor in the mandible, various surgical treatment modalities like marginal, segmental, hemimandibulectomy, or total mandibulectomy. Purpose. This study was to deteminated of rehabilitation treatment by mandible definitive obturator. The clinicians must wait for extensive period of the time for completion of healing before considering the definitive prosthesis. During this initial healing period prosthodontic intervention is required for preventing the mandibular deviation. This case report describes management of a patient who has undergone a reconstructed hemimandibulectomy with mandible definitive obturator. The prosthesis help patient moving the mandible normally without deviation during functions like speech, mastication, and aesthetic. Case Report. On March 2012, a 46 years old man was referred from Dr. Sardjito Hospital Oral Surgery Department to Department of Prosthodontics RSGM Faculty of Dentistry Gadjah Mada University Yogyakarta, for prosthetic rehabilitation following a hemimandibulectomy sinintra reconstructed with plate reconstruction three months ago. Patient felt speech function, masticatory function, and impaired performance, lower lip frequently bitten. Results. After treated while 8 months till now by mandible definitive obturator, patient felt more comfortable and confident with recovery function of speech, mastication, and aesthetic. Conclusion. The deviation of mandible after hemimandibulectomy was reconstructed by reconstruction plate surgery. During this initial healing period early prosthodontic intervention by mandible definitive obturator.
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Hao, LingYu, Jia Li, YaWen Tian, and JunHua Wu. "Changes in the MicroRNA Profile of the Mandible of Ovariectomized Mice." Cellular Physiology and Biochemistry 38, no. 4 (2016): 1267–87. http://dx.doi.org/10.1159/000443074.

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Background/Aims: In postmenopausal women, a decrease in bone mineral density (BMD) at the hip and spine is associated with an increased risk of tooth loss, possibly caused by the loss of the alveolar bone. The present study explored the effect of the ovariectomy (OVX) of mice on the miRNA expression profile of their bones. Methods: Micro-CT and histological analysis were performed on mice following OVX or sham-operation using the right mandibles. The left mandibles were used for microarray and quantitative RT-PCR to explore the change in their miRNA expression profile. The differentially expressed miRNAs (DEmiRs) of the OVX and sham-operated mice were analyzed by constructing the miRNA-mRNA-function complex network. We then also analyzed the different roles of the regulation of miRNAs in the mandible and femur by combining public data from GEO. Results: OVX could lead to a significant decrease in the BMD in the mandible. A total of 53 DEmiRs including, 18 up-regulated and 35 down-regulated miRNAs, were identified. The analysis of the miRNA-mRNA-pathway complex network suggested that miR-17-5p and miRNA-297a-5p were potential biomarkers in the development of mandibles of OVX mice. A comparison of the analysis data on the mandible and femur showed that the transforming growth factor-β signaling pathway was specifically regulated in the mandible, whereas the Wnt signaling pathway was specifically regulated in the femur. Moreover, miR-17-5p and miR-133a-3p showed different expression tendencies in the mandible and in the femur after OVX. Conclusion: This study provides an integrated function analysis of miRNA in mandibles after OVX and of miR-17-5p and miR-133a-3p as potential biomarkers. Moreover, the mechanism in mandibles may not be comparable with that in femurs with estrogen deficiency.
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Ichiishi, Wataru, Shinpei Shimada, Takashi Motobayashi, and Hiroaki Abe. "Completely engaged three-dimensional mandibular gear-like structures in the adult horned beetles: reconsideration of bark-carving behaviors (Coleoptera, Scarabaeidae, Dynastinae)." ZooKeys 813 (January 7, 2019): 89–110. http://dx.doi.org/10.3897/zookeys.813.29236.

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Adult horned beetles (Coleoptera, Scarabaeidae, Dynastinae) such as Trypoxylusdichotomus (Linnaeus, 1771) exhibit bark-carving behaviors to feed on tree sap, in part by using small projections of the clypeus. However, in the present experiments, adult horned beetles (T.dichotomus and Dynasteshercules (Linnaeus, 1758)) used their mandibles and not the projections of the clypeus to carve bark. Our findings show the presence of completely engaged mandibular interlocking, gear-like surface structures in molar areas that guide mandible opening and closure, and lead to completely synchronous movements of adult horned beetle mandibles. Three-dimensional shapes of these mandibular gear-like structures are complex and remained in contact after the death of a beetle. Moreover, adult horned beetles often performed bark-carving behaviors using only the mandible of one side, suggesting that the primary role of the mandibular gear-like structure is to prevent breakage of the mandible by transmitting load from one mandible to the other. Among the 22 Dynastinae and 16 other beetle species examined (not Dynastinae), the gear-like structure was found in all the Dynastinae species and in no other species.
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Dutta, Abir, Kaushik Mukherjee, Venkata Sundeep Seesala, Kaushik Dutta, Ranjan Rashmi Paul, Santanu Dhara, and Sanjay Gupta. "Load transfer across a mandible during a mastication cycle: The effects of odontogenic tumour." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 234, no. 5 (February 5, 2020): 486–95. http://dx.doi.org/10.1177/0954411920904618.

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The extent to which load transfer in a diseased mandible with odontogenic tumour might influence the potential risk of pathological fracture has scarcely been investigated. The study sought to investigate the quantitative deviations in load transfer across healthy and cancer-affected (diseased) mandibles having odontogenic tumours. The effect of size of the tumours (small: 9 mm diameter, large: 19 mm diameter), and variation in bone mechanical (elastic) properties of the mandible on load transfer in cancer-affected mandibles during a mastication cycle have been investigated. Based on patient-specific computed tomography–scan datasets, detailed three-dimensional finite element models of healthy and diseased mandibles were developed. High stresses of 25–30 MPa and strains ∼700 µε were observed in the healthy mandible during the right molar bite. However, marginal deviations were observed in principal stress distributions in the diseased mandibles with small- and large-sized tumours, as compared to the healthy mandible. Maximum principal strains of ∼1474 µε were found in the body region adjacent to the symphysis region for small-sized tumour. Whereas for large-sized tumour, maximum strains of ∼2700 µε were observed in the right buccal regions. Reduction in Young’s modulus due to different stages of odontogenic tumours had a localised effect on the principal stress distributions, but triggered an abrupt increase in the principal tensile strains. It appears that there is a potential risk of pathological fracture for large-sized odontogenic tumour, owing to high tensile stresses and strains.
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de Amorim Rocha, Layla Louise, Matheus Francisco Barros Rodrigues, Rodrigo da Franca Acioly, Daniel do Carmo Carvalho, and Cristofe Coelho Lopes da Rocha. "Augmentation of the Atrophic Mandible with a Block Corticomedullary Graft." Case Reports in Dentistry 2020 (June 29, 2020): 1–5. http://dx.doi.org/10.1155/2020/6837519.

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The gradual loss of the dental alveolus leads to bone resorption, which may cause atrophy of the maxilla and mandible. One of the most complex procedures in reconstructive surgery is the rehabilitation of patients with atrophic mandibles. Herein, we present a clinical case study of atrophic mandible augmentation with grafts obtained from the iliac crest. The use of reconstruction plates may represent a feasible mechanism for treatment as well as fracture prevention. Mandible augmentation performed by grafting the donor site of the iliac crest showed satisfactory results and resolution of the aesthetic and functional impairments.
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Ndiaye M R, Mar N B, Yacouba Garba K, and Ndoye J M N. "Mental foramen of Human Mandible: Morphometric Study." International Journal of Anatomy and Research 9, no. 4 (December 5, 2021): 8109–15. http://dx.doi.org/10.16965/ijar.2021.164.

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Aim: The aim of our study was to perform a morphometric analysis of the mental foramen in senegalese context. Material and method: The study was performed on thirty-nine dry mandibles of adult humans. On these mandibles, the number of mental foramen present and their shape were noted on inspection. The situation of the foramen in relation to the lower teeth was studied according to a methodology already described. The following measurements were made: the distance between the foramen and the other landmarks of the mandible (symphysis, basilar border, posterior border), vertical and horizontal diameters. Results: The number of mental foramina were 39 on the right and 40 on the left: one mandible presented a double foramen on the left. The oval shape was predominant. The most frequent situation was below the second premolar on both sides. The mean distance between the foramen and the mandibular symphysis was 25mm on both sides. The distance between the foramen and the basilar border of the mandible was on average 13mm on the right and 14mm on the left. The distance between the foramen and the posterior border of the mandible was on average 72mm on the right and 73mm on the left. The average vertical diameter was 33mm on the right and 32mm on the left, and the average horizontal diameter was 4mm on both sides. Conclusion: Mental foramen is a constant anatomical structure, found on all the mandibles studied. The results can be superimposed on those described in the majority of studies carried out on the mental foramen. Key words: Mental Foramen, Mandible Anatomy, Morphometry.
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Wheeler, Mark M. "Discriminating Between Adult Mandibles of Oryzaephilus surinamensis and Oryzaephilus mercator Using Setal Brush Length." Journal of AOAC INTERNATIONAL 76, no. 4 (July 1, 1993): 941–43. http://dx.doi.org/10.1093/jaoac/76.4.941.

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Abstract The setal brush was identified as a diagnostic characteristic which can be used to distinguish between the mandibles of adult Oryzaephilus surinamensis and O. mercator. The right and left setal brushes of 50 specimens from each species were measured. Statistical analysis showed that the mean brush lengths of the 2 species were significantly different (ρ = 0.0001). A demarcation value was established to distinguish between the mandibles. By using this value it is possible to reliably classify the mandibles of O. surinamensis and O. mercator. A mandible with setal brush >0.0296 mm would be classified as O. mercator, a mandible with a setal brush <0.0296 mm would be classified as O. surinamensis.
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Dissertations / Theses on the topic "Mandible"

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Rodrigues, Messias. "Comparação entre imagens obtidas de telerradiografia lateral convencional, e imagens de tomografia computadorizada de feixe conico, na região da sinfise mentoniana." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288879.

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Orientador: Frab Norberto Boscolo
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo com este estudo foi comparar imagens de Telerradiografia Lateral (TL) e de corte sagital mediano em Tomografia Computadorizada de Feixe Cônico (TCFC) pela exatidão da marcação de pontos na região de Sínfise Mandibular. A amostra com 28 TL e 28 TCFC, foi obtida de 28 pacientes submetidos a tratamento ortodôntico, os quais tinham características anatômicas semelhantes, na região de Sínfise Mandibular. Dez (10) examinadores calibrados analisaram todas as imagens, separadamente, em 2 períodos distintos, marcando seis pontos na região da Sínfise Mandibular, sendo eles: 1 - Ápice, 2 - Borda Incisal, 3 - Infradentário Lingual, 4 - Infradentário Vestibular, 5 - Mentoniano Interno, 6 - Mentoniano Externo. A definição dos pontos de referência, padrão prata, foi realizada por outro avaliador sem blindagem com as imagens, de TL e de TCFC, postas lado a lado. A distância, entre os pontos de referência e os marcados pelos avaliadores, foi mensurada com uma grade milimetrada superposta às imagens. Foi utilizado o coeficiente de correlação interclasses (CCI) para avaliar a reprodutibilidade intra- e inter-examinadores, e as distâncias entre os pontos marcados foram analisados pelo teste de Wilcoxon (a=0,05). Nos resultados observou-se que os pontos, Borda Incisal, Mentoniano Interno e Externo não apresentaram diferenças estatisticamente significativas (p>0,05) de distâncias entre as marcações, por outro lado os pontos Infradentário Vestibular e Lingual apresentaram diferenças (p<0,05). Baseado nos resultados obtidos pode-se concluir que a região da parte inferior da Sínfise Mandibular e Borda Incisal são locais que, para fins de diagnóstico, podem ser visualizados na TL com a mesma exatidão que a imagem tomográfica. Por outro lado, quando o local requisitado para diagnóstico estiver situado na altura mediana das raízes dos incisivos, tanto pela face vestibular quanto pela lingual, somente a imagem de TCFC oferece condições de visualização com exatidão das estruturas ali situadas.
Abstract: The aim with this study was to compare images of Lateral Teleradiography (LT) and sagittal section of Cone-Beam Computed Tomography (CBCT) through the exactness of landmarks made in the Mandibular Shymphisys region. The sample with 28 LT and 28 CBCT was obtained from 28 patients undergoing orthodontic treatment, which had similar anatomical features in the Mandibular Shymphisys region. 10 calibrated examiners evaluated all images, separately, in 2 distinct periods, marking six points in the Mandibular Shymphisys area, which are: 1 - Root Apex, 2 - Incisal Edge, 3 - Lingual Infradentale, 4 - Buccal Infradentale, 5 - Internal Mentum, 6 - External Mentum. Another examiner without blindness made the definition of factual landmarks, LT and CBCT, placed side by side. The distance between points (factual landmarks and those marked by the examiners) was measured with a millimeter grid superimposed to images. The interclass correlation coefficient (ICC) was used to evaluate the reliability intra- and inter-examiners, and the distance between marked points was analyzed using the Wilcoxon test (a=0.05). The results showed that statistical differences were not found in distances between Incisal Edge, in Internal Mentum and External Mentum points (p>0.05), on the other hand, Buccal Infradentale and Lingual Infradentale points were differences (p<0.05). In accordance with results, it can be concluded that the lower area of the Symphysis Mandibular and the Incisal Edge point are regions that to diagnosis finality can be visualized in the LT with the same exactness that in the CBCT. Therefore, when the region to diagnosis was the Symphysis Mandibular in middle region of incisor root, as much Buccal as Lingual faces, only the CBCT image supplied conditions to precise visualization of their anatomic structures.
Mestrado
Radiologia Odontologica
Mestre em Radiologia Odontológica
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Marinescu, Tanasoca Ruxandra Cristiana. "Finite element modeling of the anthropoid mandible mandible model, experimental validation, and anthropologic application /." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0017286.

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Miller, Henry A. "The effect of utilizing a third point of reference on the accuracy of the earbow facebow." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=527.

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Thesis (M.S.)--West Virginia University, 1999.
Title from document title page. Document formatted into pages; contains vi, 83 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 45-48).
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Amorim, Maise Mendonça. "Descrição morfologica do canal mandibular em radiografias panoramicas." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288452.

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Orientador: Paulo Henrique Ferreira Caria
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O conhecimento da morfologia e topografia do canal mandibular é importante para as intervenções odontológicas realizadas na mandíbula, pois implica na preservação das estruturas nobres que o atravessam. O objetivo deste trabalho foi analisar morfológica e morfometricamente o trajeto e as relações do canal mandibular em indivíduos de ambos os gêneros, pertencentes a duas faixas etárias distintas, ambas na fase adulta. A amostra foi composta por 300 radiografias panorâmicas, divididas em quatro grupos: grupos F1 e F2, formados por indivíduos do gênero feminino, pertencentes às faixas etárias de 18 a 40 anos e acima de 40 anos, respectivamente; e grupos M1 e M2 formados por indivíduos do gênero masculino, pertencentes a estas mesmas faixas etárias, respectivamente. Foram realizadas sete mensurações lineares verticais nas radiografias que descrevem o trajeto e relações do canal mandibular com estruturas anatômicas da mandíbula, além de análises relativas à posição horizontal do forame mentoniano e relação de proximidade do canal mandibular com as raízes dos dentes inferiores. Os resultados demonstraram que houve diferença estatisticamente significante em quatro das mensurações realizadas entre os gêneros, porém não foram detectadas diferenças entre as faixas etárias para nenhuma das mensurações. A posição mais comum do forame mentoniano foi entre as raízes dos pré-molares inferiores, e o canal mandibular apresenta relação de proximidade com as raízes do terceiro molar inferior, se afastando gradativamente das raízes dos outros dentes. Estes resultados sugerem que as mensurações relativas ao canal mandibular realizadas nesse estudo podem ser influenciadas pelo gênero, mas independem da faixa etária
Abstract: Morphological and topographic knowledge of the mandibular canal is paramount during dental procedures in the jaw, as structures that go through this canal must be preserved. The aim of this study was to analyze morphologic and morphometrically the course and relations of the mandibular canal of both male and female adults, belonging to two different groups of ages. The sample was composed of 300 panoramic radiographs shared in 4 groups: Groups F1 and F2: female gender (ranging between 18-40 years and above 40 years, respectively); Groups M1 and M2: male gender (ranging between 18-40 years and above 40 years, respectively). Seven linear vertical measurements were performed in the radiographs to describe the course and relations of the mandibular canal with anatomic structures of jaw. Mental foramen horizontal position and proximity relation between the mandibular canal and the roots of the inferior teeth were also evaluated. Statistically significant differences were observed in four of the measurements between genders. However, there was no difference between groups of age for any of the measurements. The most frequent position of the mental foramen was between the roots of the inferior pre-molars; and the mandibular canal shows proximity relation to the roots of the inferior third molar, moving gradually away from the roots of the other teeth. The results suggest that the measurements related to mandibular canal performed in this study can be influenced by the gender but are independent of age
Mestrado
Anatomia
Mestre em Biologia Buco-Dental
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Nascimento, Frederico Felipe Antonio de Oliveira. "Avaliação biomecânica de três desenhos de osteotomia sagital do baixo mandibular." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288683.

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Orientador: Renato Mazzonetto
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: A osteotomia sagital do ramo mandibular tem sido o procedimento mais usado por cirurgiões bucomaxilofaciais para a correção de deformidades mandibulares. Numerosas modificações no desenho desta osteotomia têm sido proposta na literatura. O objetivo deste estudo foi avaliar a influência dos diferentes desenhos da osteotomia sagital do ramo mandibular na estabilidade e dissipação de forças através do ramo e corpo mandibular. A amostra total foi composta de 30 hemimandíbulas divididas em três grupos. A modificação proposta por Epker (1977) que corresponde ao grupo I, por Wolford et al (1987) que corresponde ao grupo II e Wyatt (1997) que corresponde ao grupo III, confeccionadas em poliuretano e fixadas com parafusos de titânio em L invertido posicionalmente. Três diferentes tipos de desenhos foram testados. As hemimandíbulas sofreram carregamento linear a uma proporção de 1mm/min analisado pela extensometria e teste de flexão em cada um dos grupos. Os resultados foram analisados estatisticamente e não foi observado diferença estatísticamente significante entre os grupos I e II, mas o grupo III apresentou valores estatísticos menores em relação aos outros grupos. A extensometria mostrou diferenças na distribuição das tensões entre os grupos estudados
Abstract: Bilateral sagittal split ramus osteotomy has been the most surgical procedure performed by oral and maxillofacial surgeons to correct mandibular deficiencies. Numerous design and modifications have been introduced in the literature. The purpose of this study is evaluate different design of sagittal mandibular ramus osteotomy on stability and dispelling forces through the mandibular ramus and body. Three design of sagittal split osteotomy was choiced to this study. The mandible suffered mechanical mastigatory stress analised by strain gauge and bending strength evaluation of each one of these design techniques. The sample of this study were compoud by 30 half mandible confectioned in polyurethane. The half mandible will be fixed with positional titanium screws. The groups were submitted to mechanical bending tests with 1mm/min until the peak load. The results demonstrated no statistical significance between group 1 and 2, but the results demostrated that group III reached inferior values when compared with other groups. Strain gauge tests showed difference on mechanical force distribution between the studied groups
Doutorado
Cirurgia e Traumatologia Buco-Maxilo-Faciais
Doutor em Clínica Odontológica
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6

Ratcliffe, Peter H. "The development of surgical procedures for the correction of acquired or developmental anomalies of the mandible." Thesis, The University of Sydney, 1985. http://hdl.handle.net/2123/4756.

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Gamba, Thiago de Oliveira 1977. "Avaliação do dimorfismo sexual por meio de estudo antropométrico em imagens por tomografia computadorizada de feixe cônicos." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288978.

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Orientador: Francisco Haiter Neto
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo no presente estudo foi verificar se medidas antropológicas realizadas em mandíbulas, por meio de imagem de Tomografia Computadorizada de feixe cônico (TCFC), podem detectar o dimorfismo sexual em uma população brasileira. Adicionalmente, criar uma fórmula, a partir destas medidas para determinação do sexo. Para isso, foi selecionada uma amostra de 159 imagens de TCFC de indivíduos de uma população brasileira (74 homens e 85 mulheres), com idade variando de 18 a 60 anos. As imagens foram analisadas por 5 avaliadores, que realizaram seis mensurações: comprimento do ramo mandibular em altura (CR), comprimento da base mandibular (CBM), menor comprimento do ramo mandibular em largura (MCR), ângulo goníaco (AG), distância intercondilar (DIC) e distância intergoníaca (DIG), em reconstruções 3D de TCFC. Após quinze dias, as mensurações foram repetidas com 25 % da amostra. Para análise estatística, foi aplicada a Correlação Intraclasse na avaliação intra e interexaminador, Análise de Variância (ANOVA) para comparação entre os valores médios das mensurações presentes e equações binárias de Regressão Logística foram criadas para determinação do sexo. As mensurações evidenciaram valores do sexo masculino superiores aos do feminino, exceto na variável MCR que não apresentou diferença estatisticamente significante entre os sexos. As medidas com maiores índices dimórficos foram: DIG, CR, DIC, e AG. Associando estas quatro medidas obteve-se uma precisão de 95,1% na determinação do sexo, assim, foi possível concluir que a fórmula desenvolvida no presente estudo pode ser utilizada para identificação do sexo na prática forense
Abstract: The aim of this study was to determine whether anthropological measurements taken in jaws through image cone beam CT (CBCT) could aid in detecting sexual dimorphism in a Brazilian population. Additionally, this study was aimed at creating a formula from these measurements for sex determination. Subjects (n=159) involved a Brazilian population (74 men and 85 women), aged 18-60 years. The CBCT images were analyzed by 5 reviewers, who performed six measurements in the analysis of sexual dimorphism: Ramus length (R-L); Gonion-gnathion length (G-G-L); Minimum ramus breadth (M-R-Br); Gonial angle (G-A); Bicondylar breadth (Bic-Br); and Bigonial breadth (Big-Br), reconstructions in 3D CBCT. The measurements were repeated with 25% of the sample 15 days after the first evaluation for statistical analysis, the intraclass correlation was used to evaluate intra- and inter-examiners, the Analysis of Variance (ANOVA) to compare the mean values and the binary logistic regression equations were created to determine the sex. The measurements showed higher values for males, except for M-R-Br, showing no statistically significant difference between genders. The measurements with the highest rates were dimorphic: Big-Br, R-L, Bic-Br and GA. When the four variables were associated, an accuracy of 95.1% in sex determination was observed. In conclusion, the formula developed in this study can be used for sexual differentiation in forensic settings
Mestrado
Radiologia Odontologica
Mestre em Radiologia Odontológica
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Nelson, Gregory J. "Three dimensional computer modeling of human mandibular biomechanics." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26506.

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Previous analyses of mandibular biomechanics have incorporated a wide variety of approaches and variables in attempts at describing the relationships between the forces generated by the muscle and the forces of resistance at the dentition and temporomandibular joints. The most difficult element to determine in man has been the role of the joint forces which require indirect analyses. A critical literature review points out the problems associated with previous analyses of mandibular mechanics and predictions of joint loading and the need for the incorporation of all relevant anatomical and physiological parameters in order to realistically quantify these relationships. A computerized mathematical model of human mandibular biomechanics for static functions is presented which allows the determination of forces occurring at the dentition and the joints due to the individual muscle force contributions. Utilizing the principles of static equilibrium the model provides for the determination of these forces for any individual for whom the necessary input parameters have been derived. Anatomically, this model requires the designation of the three dimensional coordinates of the origin and insertion points of nine pairs of masticatory muscles, any position of tooth contact, and the temporomandibular joint positions. Determination of the forces generated by the individual muscle groups, and therefore the overall muscle force resultant acting on the system, is given by the product of a number of physiological parameters. These include the physiological cross-section, the intrinsic force per unit of cross-sectional area, and the relative activation level of each muscle for the specific static function. Also required is the three dimensional orientation of tooth resistance force at the designated position of tooth contact, as well as that of the left joint force in the frontal plane. This information reduces the variables in the equilibrium equations to a determinate number which has a single unique solution for each of the tooth and two joint resistance forces. The magnitudes as well as three dimensional orientations of the resultant vectors of the muscles, the tooth resistance force and the two temporomandibular joints are thereby determined mathematically. Both bilaterally symmetrical and unilateral clenching functions as well as three intervals near the intercuspal position of chewing were tested with this model using data derived from literature sources from real subjects. This data was incorporated into a hypothetical average individual data file. Using this data, derivation of the magnitudes and orientations of muscle and tooth forces were made providing predictions as to the nature of temporomandibular joint loading for this individual. The extent of muscle force generated for static maximal clenching tasks modeled was a maximum of 1000 to 1200 N during intercuspal clenching. The orientation of muscle force with respect to the occlusal plane varied from about 90 degrees in the lateral plane, for more posterior molar functions, to 64 degrees for incisal functions. Maximal tooth resistance forces were around 500 to 600 N at the molars versus only 130 to 140 N at the incisors. Unilateral functions showed the working side joint to be more heavily loaded than the balancing side especially for a more posterior function (i.e. molar). Less muscle and therefore tooth force was produced unilaterally but with the benefit of even less residual joint force. Thus, unilateral functions appear to be much more efficient in terms of the distribution of forces between the dentition and joints. Variation in tooth orientation produced variations in both the orientation and magnitudes of the joint forces exhibiting a functional interrelationship of these forces. Based on the analysis in general, the joints were predicted to be capable of resisting up to 300 N of force per side directed anterosuperiorly at about 60 to 100 degrees in the lateral plane. More divergent forces at the joints were found to be of substantially lower magnitude in the lateral and frontal planes. These findings are in good agreement with other studies.
Dentistry, Faculty of
Graduate
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Coelho-Ferraz, Maria Julia Pereira. "Correlação eletromiografica e cefalometrica da biomecanica mandibular com o movimento mastigatorio predominante." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290905.

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Orientador: Fausto Berzin
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O estudo da biomecânica craniomandibular está relacionado ao sistema de alavancas e da relação entre função e deformações mecanicamente induzidas. Este estudo objetivou avaliar a dinâmica muscular mastigatória e correlacionar o lado de movimento mastigatório mais vertical e/ou mais horizontal estabelecido pelo Ângulo Funcional Mastigatório de Planas (AFMP) por meio da fotogrametria, com o comportamento da atividade muscular estampado na eletromiografia de superfície e nas imagens radiográficas. Selecionaram-se 17 indivíduos de ambos os gêneros, com idade média aproximada de 25 anos, leucodermas, relação dentária de Classe I de Angle, sem sinais e sintomas aparentes de desordens musculares mastigatórias. Realizou-se radiografia panorâmica e telerradiografia em norma lateral e eletromiografia de superfície. A obtenção das imagens radiográficas seguiu as normas preconizadas pela Faculdade de Odontologia de Piracicaba/ UNICAMP. Os dados eletromiográficos foram obtidos, bilateralmente, dos músculos masseter, temporal porção anterior e supra-hióideos nas posições de repouso e isometria. Utilizaram-se eletrodos de superfície passivo infantil de Ag/AgCl, formato circular, descartável da Meditrace® Kendall-LTP, modelo Chicopee MA01, acoplados a um pré-amplificador com ganho de 20 vezes formando um circuito diferencial. Os registro dos sinais elétricos foram captados pelo equipamento EMG-8OOC da EMG System do Brasil Ltda de oito canais, freqüência de amostragem de 2KHz e 16 bits de resolução, filtro digital com passa banda de 20 a 500Hz. Utilizou-se também um transdutor pressurizado que consiste de um tubo de borracha pressurizados conectado a um elemento sensor (MPX 5700)*1 para obtenção da força máxima de mordida. Para a mensuração da amplitude de abertura, adotou-se um goniômetro mandibular da EMG System do Brasil. Estabeleceu-se a comparação e a correlação entre os grupos com AFMP> 5° e AFMP< 5° por meio do teste ¿t¿ de Student ou teste de Mann-Whitney conforme a distribuição era normal ou não, respectivamente. Os resultados mostraram diferenças significativas entre os grupos com AFMP< 5° e AFMP>5°, porém sem dimorfismo sexual, para as medidas de força de mordida (38,70±10,88 e 27,28±11,40), para a abertura máxima (40,04±11,82 e 26,86±11,70) e para o músculo masseter em isometria (174,16±49,67 e 116, 41±51,11). Uma correlação forte entre os músculos masseter com a força de mordida (r= 0,63 p= 0,0001) ocorreu para o grupo com AFMP>5°. No Triângulo Hióideo, para ambos os grupos, o comportamento vertical e angular do osso hióide representados pela HH¿ e APH, apresentaram correlações significantes com a dinâmica mandibular gravada na radiografia panorâmica. Concluiu-se que os aspectos anátomofisiológicos da ATM estão relacionados com a função mandibular assimétrica
Abstract: The study of the craniomandibular biomechanics is related to the system of predominant lever and of the relation between function and mechanically induced deformations. This study has the purpose of evaluating the chewing muscular dynamics and correlating the chewing movement side that is more vertical and/or more horizontal set up by the photomeasurement Planas' Masticatory Functional Angle (MFA) to the muscular activity behavior, shown in the surface electromyography and in the radiographic images. Seventeen people of both sex, medium aged about 25, were selected, white skin and presenting Class I of Angle without apparent sign and symptom. The panoramic radiography and telerradiography in lateral position and surface electromyography were made. The acquisition of radiographic images followed the rules established by the Piracicaba Dental School (UNICAMP). The electromiographic data were obtained bilaterally from the masseter muscles, anterior temporal portion and supra-hyoids at the postural position and isometric position. Medtrace® passive bipolar surface electrodes were used coppled to a pre-amplifier, forming a circuit corresponding to a differential circuit. The registrations of the electric signals were caught by EMG- 800C equipment of Brazil EMG System Ltda with eigth channels, sample frequency of 2 KH and 16 bits resolution, digital filter with a band pass of 20-500 Hz. A pressurized transductor was used, which consists of a pressurized rubber tube connected to a sensor (MPX 5700)* to obtain maximum biting force. A mandibular goniometer of the EMG System of Brazil was used to measure the opening size. A comparison and correlation between the groups with MFA < 5° and MFA> 5° through ¿t¿ Student or a Man- Whitney test according to the normality or not of the distribution, respectively. The results have shown important differences between the groups with MFA < 5° and MFA > 5° but without sexual disformity to the biting force measurements (38,70 ±, 10,88 and 27,28 ±11,40), for the maximum opening. (40,04 ± 11,82 and 26.86± 11,70) and masseter muscle isometric (174, 16± 49,67 and 116, 41± 51,11). A strong correlation between the masseter muscles to the biting force (r = 0,63 p =0,0001) occurred for the groups with MFA > 5°. On the Hyoid triangle, for both groups, the vertical and angular behavior of the hyoid bone represented by H¿H¿ and PHA showed important correlations to the mandibular dynamics recorded on the panoramic radiography. All these results indicate to a strong relationship between the aspects anatomic physiological with asymmetric mandibular function
Doutorado
Anatomia
Doutor em Biologia Buco-Dental
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Ladeira, Daniela Brait Silva. "Distorção de imagens em radiografias panoramicas com relação a distancia intergoniaca." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290139.

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Orientador: Solange Maria de Almeida
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: A realização de medidas precisas em radiografias panorâmicas é duvidosa, devido à distorção por ampliação de imagens. Por ser um método tomográfico, somente a porção do objeto localizada na camada de imagem do aparelho estará livre de distorção. O objetivo nesse trabalho foi determinar a camada de imagem do aparelho panorâmico Orthopantomograph OP 100 e avaliar a relação entre distâncias intergoníacas e medidas lineares em radiografias panorâmicas. Para a determinação da camada de imagem foi construído um phantom constituído por uma placa acrílica de 14cm², com sua superfície contendo perfurações a cada 0,5cm. O phantom foi posicionado no local do apoio de mento do aparelho panorâmico, com sua superfície paralela ao plano horizontal. Esferas metálicas de 0,315cm foram inseridas nas perfurações, e executadas radiografias panorâmicas. Cada coluna de cada quadrante foi individualmente preenchida pelas esferas para a execução das radiografias, em três planos horizontais diferentes: alturas orbital, oclusal e mentual. As imagens radiográficas obtidas foram analisadas e a camada de imagem localizada. Mostrou-se curva no plano horizontal, e mais estreita na região anterior; no plano vertical, apresentou discreta assimetria da cavidadeorbitária em direção ao mento, e entre os lados direito e esquerdo. Na etapa seguinte, mandíbulas maceradas foram separadas em três grupos de dez mandíbulas cada, de acordo com as distâncias intergoníacas: G1(8,2cm), G2(9,0cm) e G3(9,6cm). As mandíbulas receberam em sua superfície, triângulos retângulos isósceles confeccionados com esferas metálicas de 0,198cm, fixados nas regiões de incisivos, caninos/pré-molares, molares, ângulo e ramo da mandíbula. As mandíbulas foram individualmente radiografadas sobre o phantom, nos limites da camada de imagem, primeiramente com os triângulos fixados na superfície externa, e em uma segunda etapa, na superfície interna. As imagens radiográficas dos triângulos foram medidas, e obtiveram-se duas medidas para cada triângulo, uma vertical e outra horizontal, e calculadas as medianas entre as medidas internas e externas. Após análise estatística utilizando-se o teste de Tukey (a=0,05), observou-se que não houve diferenças estatisticamente significativas nas medidas verticais e horizontais entre os grupos G1, G2 e G3. Concluiu-se não haver relação entre a distância intergoníaca e medidas lineares horizontais e verticais. Porém, as medidas variaram entre as diferentes regiões de um mesmo grupo. Essa variação foi maior para as medidas horizontais em relação às verticais.
Abstract: Precise measures in panoramic radiographs are questionable due to the image distortion. As a tomographic method, only the structures located on the image layer is free of distortion. The aim in this work was to determine the image layer of the panoramic Orthopantomograph OP 100 unit and to evaluate the relationship between intergoniac distances and linear measures in panoramic radiographies. To determine the image layer it was idealized a phantom produced by a 14cm² acrylic plate with holes every 0,5cm. The phantom was placed on the panoramic device mental support, with the surface parallel to the horizontal plan. 0,315cm metal spheres were inserted in the holes and then, panoramic radiographies were taken. A column of each quadrant was filled by the spheres to radiographic exposure in three horizontal plains: orbital, occlusal and symphysis levels. The radiographic images were examined and the image layer was located. It showed curve in the horizontal plane with narrowing in the anterior region; in the vertical plan, it showed slight asymmetry of the orbital cavity toward the symphysis, and between the right and left sides. After that, dry mandibles were separated in three different groups with ten mandibles per group according the intergoniac distances: G1(8,2cm), G2(9,0cm) e G3(9,6cm). Isosceles rectangular triangles confectioned with 0,198cm metal spheres were set in the regions of incisors, canines/ bicuspid, molars, angle and mandibular ramus. Each mandible was radiographed separately on the phantom in the image layer limits. At first the triangles were set on the external surface and, in a second step, they were set on the internal surface. After all the radiographic images taken, the triangles were measured resulting in two measures for each triangle, one vertical and another one horizontal. The median values between the internal and external measures were calculated and the data were submitted to Tukey Test (a=0,05). There were no statistically significant differences in vertical and horizontal measures among the groups G1, G2 and G3. Thus, it was possible to conclude that there is not relationship between the intergoniac distance and horizontal and vertical linear measures. However, the measures ranged between the different regions of one same group and this variation was greater for horizontal measures in relation to vertical.
Mestrado
Radiologia Odontologica
Mestre em Radiologia Odontológica
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Books on the topic "Mandible"

1

1934-, Bailey Byron J., and Holt G. Richard, eds. Surgery of the mandible. New York: Thieme Medical Publishers, 1987.

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Spiessl, Bernd. Internal Fixation of the Mandible. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-71034-6.

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Schmoker, Roland R. Functional Reconstruction of the Mandible. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-71756-7.

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C, Killey H., ed. Killey's fractures of the mandible. 4th ed. Oxford [England]: Wright, 1991.

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E, Hayden Richard, ed. Reconstruction of the mandible and oropharynx. Philadelphia: Saunders, 1994.

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Brown, James Stephen. Invasion of the mandible in oral cancer. Birmingham: University of Birmingham, 1994.

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Bonatesta, Gino. Die Entwicklung der Knochenplastik im Unterkiefer zwischen 1919 und 1939 in Deutschland. [Zürich]: Juris Druck + Verlag Dietikon, 2000.

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Zafar, Hamayun. Integrated jaw and neck function in man: Studies of mandibular and head-neck movements during jaw opening-closing tasks. Umea: Department of Odontology, Clinical Oral Physiology, Imea University, 2000.

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R, Clarke Malcolm, Marine Biological Association of the United Kingdom., and Natural Environment Research Council (Great Britain), eds. A Handbook for the identification of cephalopod beaks. Oxford [Oxfordshire]: Clarendon Press, 1986.

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Rekany, Ilonia. Chin and mandible: Medical & dental subject analysis with reference bibliography. Washington, D.C: ABBE Publishers Association, 1987.

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Book chapters on the topic "Mandible"

1

Hangay, George, Susan V. Gruner, F. W. Howard, John L. Capinera, Eugene J. Gerberg, Susan E. Halbert, John B. Heppner, et al. "Mandible." In Encyclopedia of Entomology, 2281. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_1699.

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Dubey, Siba P., and Charles P. Molumi. "Mandible." In Color Atlas of Head and Neck Surgery, 133–40. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15645-3_7.

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von Arx, Thomas, and Scott Lozanoff. "Posterior Mandible." In Clinical Oral Anatomy, 285–303. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-41993-0_14.

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von Arx, Thomas, and Scott Lozanoff. "Anterior Mandible." In Clinical Oral Anatomy, 429–43. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-41993-0_20.

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Naini, Farhad B. "The Mandible." In Facial Aesthetics, 295–311. West Sussex, UK: John Wiley & Sons, Ltd., 2013. http://dx.doi.org/10.1002/9781118786567.ch19.

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Haribhakti, Vijay V. "The Mandible." In Restoration, Reconstruction and Rehabilitation in Head and Neck Cancer, 167–76. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-2736-0_11.

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Taub, Peter J., and Magdalena Soldanska. "Mandible Fractures." In Ferraro's Fundamentals of Maxillofacial Surgery, 175–84. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4614-8341-0_13.

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Graf, P. F., and R. Sader. "Osteoradionekrose der Mandibula / Osteoradionecrosis of the Mandible." In Deutsche Gesellschaft für Chirurgie, 905. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-56458-1_371.

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Raghavan, Prashant, Mark J. Jameson, Matthew A. Hubbard, Max Wintermark, and Sugoto Mukherjee. "Maxilla and Mandible." In Manual of Head and Neck Imaging, 321–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-40377-4_11.

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Kushner, George M. "Pediatric Mandible Fractures." In Pediatric Maxillofacial Trauma, 97–114. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53092-1_7.

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Conference papers on the topic "Mandible"

1

Raad, Bahram, Narges Shayesteh Moghaddam, and Mohammad Elahinia. "A Comparison Between Porous NiTi and Ti-6Al-4V Fixation Hardware on Bone Remodeling After a Reconstruction Surgery." In ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8556.

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The aim of this article is to investigate the effect of two different fixation hardware materials on bone remodeling after a mandibular reconstruction surgery and to restore the mandible’s function, healthy appearance, mastication, swallowing, breathing, and speech. The hypothesis is that using fixation hardware with stiffness close to that of the surrounding bone will result in a more successful healing process in the mandible bone. The finite element model includes the material properties and forces of the cancellous bone, cortical bone, ligaments, muscles, and teeth. The reconstruction surgery is modeled by including the fixation hardware and the grafted bone. In the sectioned mandible, to best mimic the geometry of the mandible, two single barrel grafts are placed at the top of each other to form a double barrel graft set. Two different materials were used as the mandibular fixation parts, stiff Ti-6Al-4V, and porous superelastic Nickel-Titanium (NiTi) alloys. A comparison of these two alloys demonstrates that using porous NiTi alloy as the fixation part results in a faster healing pace. Furthermore, the density distribution in the mandibular bone after the healing process is more similar to the normal mandible density distribution. The simulations results indicate that the porous superelastic NiTi fixation hardware transfers and distributes the existing forces on the mandible bone more favorably. The probability of stress shielding and/or stress concentration decrease. This type of fixation hardware, therefore, is more appropriate for mandible bone reconstruction surgery.
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Chaudhary, Naresh, Scott Lovald, Jon Wagner, Tariq Khraishi, James Kelly, and John Wood. "Modeling of Screw-Plate Systems for Mandibular Fracture Repair." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-62256.

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Fractures of the mandible are a common form of traumatic injury. These fractures may be repaired using miniplates secured to cortical bone with screws. In the present research, the authors measure the pull-out strengths of cortical screws using a standard test paradigm and develop a finite element model to analyze forces acting on these screws. Pull-out strengths are measured in a tri-laminate synthetic material that mimics the cortical layers and cancellous bone of the mandible. A finite-element (FE) model is developed to analyze the mechanics of deformation of the model bone during the pullout process. Issues that are important for the proper modeling of both normal and fractured mandibles are also considered.
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Grosser, Benjamin. "Mandible reconstruction project." In ACM SIGGRAPH 2004 Computer animation festival. New York, New York, USA: ACM Press, 2004. http://dx.doi.org/10.1145/1186015.1186079.

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Moghaddam, Narges Shayesteh, Mohammad Elahinia, Michael Miller, and David Dean. "Enhancement of Bone Implants by Substituting Nitinol for Titanium (Ti-6Al-4V): A Modeling Comparison." In ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/smasis2014-7648.

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Mandibular segmental defect reconstruction is most often necessitated by tumor resection, trauma, infection, or osteoradionecrosis. The standard of care treatment for mandibular segmental defect repair involves using metallic plates to immobilize fibula grafts, which replace the resected portion of mandible. Surgical grade 5 titanium (Ti-6Al-4V) is commonly used to fabricate the fixture plate due to its low density, high strength, and high biocompatibility. One of the potential problems with mandibular reconstruction is stress shielding caused by a stiffness mismatch between the Titanium fixation plate and the remaining mandible bone and the bone grafts. A highly stiff fixture carries a large portion of the load (e.g., muscle loading and bite force), therefore the surrounding mandible would undergo reduced stress. As a result the area receiving less strain would remodel and may undergo significant resorption. This process may continue until the implant fails. To avoid stress shielding it is ideal to use fixtures with stiffness similar to that of the surrounding bone. Although Ti-6Al-4V has a lower stiffness (110 GPa) than other common materials (e.g., stainless steel, tantalum), it is still much stiffer than the cancellous (1.5–4.5 GPa) and cortical portions of the mandible (17.6–31.2 GPa). As a solution, we offer a nitinol in order to reduce stiffness of the fixation hardware to the level of mandible. To this end, we performed a finite element analysis to look at strain distribution in a human mandible in three different cases: I) healthy mandible, II) resected mandible treated with a Ti-6Al-4V bone plate, III) resected mandible treated with a nitinol bone plate. In order to predict the implant’s success, it is useful to simulate the stress-strain trajectories through the treated mandible. This work covers a modeling approach to confirm superiority of nitinol for mandibular reconstruction. Our results show that the stress-strain trajectories of the mandibular reconstruction using nitinol fixation is closer to normal than if grade 5 surgical titanium fixation is used.
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Fan, Kathleen F., Colin Hopper, Paul M. Speight, Claire Davies, and Stephen G. Bown. "Photodynamic therapy on normal rabbit mandible." In Fifth International Photodynamic Association Biennial Meeting, edited by Denis A. Cortese. SPIE, 1994. http://dx.doi.org/10.1117/12.203391.

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"MANDIBLE PARAMETERIZATION USING A REFERENCE LINE." In Special Session on Medical Image Analysis and Description for Diagnosis Systems. SciTePress - Science and and Technology Publications, 2012. http://dx.doi.org/10.5220/0003891505480553.

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Zeilhofer, Hans-Florian U., Robert Sader, Hans-Henning Horch, Rainer Kirsten, Arthur P. Wunderlich, and Martin Lenz. "Computer-supported individual reconstruction of the mandible." In Medical Imaging 1995, edited by Eric A. Hoffman. SPIE, 1995. http://dx.doi.org/10.1117/12.209712.

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Kong, Xiangzhan, Xingguang Duan, Yonggui Wang, Meng Li, Yang Yang, Amjad Ali Syed, and Chang Li. "Navigation method for mandible reconstruction surgery robot." In 2013 IEEE International Conference on Robotics and Biomimetics (ROBIO). IEEE, 2013. http://dx.doi.org/10.1109/robio.2013.6739467.

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Cardozo, Bianca, Felippe Prado, Ana Rossi, Rafael Araujo, and Alexandre Freire. "Morphological study of mandible of Sapajus apella monkeys." In Congresso de Iniciação Científica UNICAMP. Universidade Estadual de Campinas, 2019. http://dx.doi.org/10.20396/revpibic2720193004.

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Williams, J. C., Donna Erickson, Yousuke Ozaki, Atsuo Suemitsu, Nobuaki Minematsu, and Osamu Fujimura. "Neutralizing differences in mandible displacement for English vowels." In ICA 2013 Montreal. ASA, 2013. http://dx.doi.org/10.1121/1.4800755.

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Reports on the topic "Mandible"

1

Hislop, Stuart. AO Mandible Symphyseal and Subcondylar Fracture. Touch Surgery Publications, December 2018. http://dx.doi.org/10.18556/touchsurgery/2016.s0150.

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Hislop, Stuart. AO Mandible Symphyseal and Subcondylar Fracture. Touch Surgery Simulations, December 2018. http://dx.doi.org/10.18556/touchsurgery/2018.s0150.

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M, Gilbert. Case Report: An Extreme Case of Alveolar Bone Resorption in an Edentulous Mandible. Science Repository, May 2019. http://dx.doi.org/10.31487/j.dobcr.2019.02.03.

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Shinmyouzu, Kouhei. Conceptual model to optimize implant positioning in edentulous mandible treated with an over denture; A case series preliminary report. Science Repository, April 2019. http://dx.doi.org/10.31487/j.dobcr.2019.02.01.

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Lin, Zhezhen. The clinical performance of short implants (4-5 mm) in the posterior mandible: a systematic review and meta-analysis of randomized controlled trials. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, June 2020. http://dx.doi.org/10.37766/inplasy2020.6.0039.

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De Menezes, Dr Nigel Antonio, Dr Chetan R. Patil, and Dr Madhu Pujar. NON SURGICAL MANAGEMENT OF A LARGE CHRONIC PERIAPICAL LESION USING TRIPLE ANTIBIOTIC PASTE (TAP) AND CALCIUM HYDROXIDE. World Wide Journals, February 2023. http://dx.doi.org/10.36106/ijar/3506664.

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Trauma or traumatic injuries to the teeth can cause necrosis of the pulp by disrupting blood supply leading to anaerobic conditions which favors growth of opportunistic micro organisms, which over time may subsequently result in development of periapical lesions The patient had a large periapical lesion in the anterior region of the mandible with mobile teeth. After stabilization by splinting, non surgical treatment was done. During the non surgical RCT, after access opening yellow straw coloured uid was aspirated through the root canal, cleaning and shaping was the done followed by placement of Calcium hydroxide for 2 weeks interval for a month, followed by placement of TAP for another 2 appointments at 2 weeks interval for a month. Satisfactory periapical healing was seen at 1 month, 2month and 5 month recall, with considerable decrease in size of the lesion and decrease in mobility with the teeth. ABSTRACT KEYWORDS : Healing, Nonsurgical, Periapical lesion, Aspiration, Cyst, Triple antibiotic paste, Calcium
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