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Crivellaro, Fernando Sacilotto - One of the best experts on this subject based on the ideXlab platform.
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Estudo e desenvolvimento de sistema baseado em sensores de pressão aplicados à ortodontia
2016Co-Authors: Crivellaro, Fernando SacilottoAbstract:Este trabalho tem por objetivo o estudo e o desenvolvimento de uma solução de engenharia para o mapeamento e caracterização da oclusão dentária, não somente no âmbito de sua distribuição ao longo da arcada, mas também através da mensuração da intensidade de pressão nos pontos de contato oclusal interarco. Neste sentido, empregaram-se esforços no aprofundamento do conhecimento neste campo da Odontologia, assim como, na elaboração de um sistema experimental que, utilizando sensores de pressão/força resistivos (FSR) específicos para uso odontológico, viabilizou a análise do estado da oclusão, atuando como agente facilitador no diagnóstico de desequilíbrios oclusais. Inicialmente, são apresentados e esclarecidos os principais conceitos da esfera odontológica, os quais são tomados como base para todos os projetos deste trabalho, além da abordagem referente às formas de contato entre os dentes, aos diferentes tipos de oclusão e seus problemas. Em relação ao desenvolvimento do sistema, foram projetadas duas placas de circuito impresso para interface com os sensores e elaborados o firmware de acesso ao hardware, assim como o software de gerenciamento global do sistema. Todos os blocos do circuito de condicionamento foram avaliados e as suas funcionalidades validadas. Do mesmo modo, a caracterização da resposta dos sensores e a sua homogeneidade ao longo da extensão sensível foram analisadas, demonstrando que a resistência elétrica varia de forma análoga em todas as áreas do sensor. Através de ensaios realizados com sujeito envolvido no projeto, estabeleceu-se um comparativo entre a utilização do papel carbono e o sistema desenvolvido, mostrando as vantagens na utilização do segundo, principalmente atreladas à capacidade de avaliação da intensidade dos contatos oclusais. Por fim, ainda se valendo do uso paralelo do papel carbono, foram efetuados ensaios de análise da oclusão em sujeito envolvido no projeto utilizando placa miorrelaxante, possibilitando a utilização da capacidade do sistema desenvolvido para executar ajustes precisos na placa, com a finalidade de manter o balanço de pressões oclusais entre ambos os lados da arcada.This essay has as objective the study and development of an engineer solution for the dental occlusion mapping and characterization, not only related to the interarch occlusal contact distribution, but also through the pressure magnitude measuring in each. In this sense, was employed effort in the Odontological knowledge increasing and also in the system elaboration allowing the occlusion state evaluation and acting as an easier agent in the occlusion disturbs diagnosing using a specific pressure/force sensing resistor (FSR) for dental use. Initially the main concepts of the Odontological sphere are presented, clarified and took as a base for all the projects in this essay. Besides this, different teeth contacts shapes are shown, as well as the occlusion’s types and its problems. In the system development, two printed circuit boards were designed for sensor interfacing. The hardware access through the firmware was elaborated, even as the global system managing software. All the conditioning circuit blocks and functionalities were evaluated and validated. In the same way, the sensor’s output and its homogeneity through all the sensible extension were evaluated, showing that the sensor’s electric resistance changes in the same form in all the sensor’s areas. In addition, it was showed the advantages of the developed system over the Articulation Paper through trials with a subject that is part of the project, showing the capacity of the system in the occlusion contacts magnitude evaluation. Ultimately, also in an Articulation Paper versus the developed system comparison, it was made occlusion analysis trials with subject using a night guard for teeth grinding (bruxism), showing the system capacity of precisely adjust the night guards for pressure balance between the both arch sides
Sang Wan Shin - One of the best experts on this subject based on the ideXlab platform.
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relationship between Articulation Paper mark size and percentage of force measured with computerized occlusal analysis
The Journal of Advanced Prosthodontics, 2012Co-Authors: Sarah Qadeer, Robert B Kerstein, Ryan Jin Yung Kim, Jungbo Huh, Sang Wan ShinAbstract:PURPOSE Articulation Paper mark size is widely accepted as an indicator of forceful tooth contacts. However, mark size is indicative of contact location and surface area only, and does not quantify occlusal force. The purpose of this study is to determine if a relationship exists between the size of Paper marks and the percentage of force applied to the same tooth. MATERIALS AND METHODS Thirty dentate female subjects intercuspated into Articulation Paper strips to mark occlusal contacts on their maxillary posterior teeth, followed by taking photographs. Then each subject made a multi-bite digital occlusal force percentage recording. The surface area of the largest and darkest Articulation Paper mark (n = 240 marks) in each quadrant (n = 60 quadrants) was calculated in photographic pixels, and compared with the force percentage present on the same tooth. RESULTS Regression analysis shows a bi-variant fit of force % on tooth (P<.05). The correlation coefficient between the mark area and the percentage of force indicated a low positive correlation. The coefficient of determination showed a low causative relationship between mark area and force (r(2) = 0.067). The largest Paper mark in each quadrant was matched with the most forceful tooth in that same quadrant only 38.3% of time. Only 6 2/3% of mark surface area could be explained by applied occlusal force, while most of the mark area results from other factors unrelated to the applied occlusal force. CONCLUSION The findings of this study indicate that size of Articulation Paper mark is an unreliable indicator of applied occlusal force, to guide treatment occlusal adjustments.
Sarah Qadeer - One of the best experts on this subject based on the ideXlab platform.
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relationship between Articulation Paper mark size and percentage of force measured with computerized occlusal analysis
The Journal of Advanced Prosthodontics, 2012Co-Authors: Sarah Qadeer, Robert B Kerstein, Ryan Jin Yung Kim, Jungbo Huh, Sang Wan ShinAbstract:PURPOSE Articulation Paper mark size is widely accepted as an indicator of forceful tooth contacts. However, mark size is indicative of contact location and surface area only, and does not quantify occlusal force. The purpose of this study is to determine if a relationship exists between the size of Paper marks and the percentage of force applied to the same tooth. MATERIALS AND METHODS Thirty dentate female subjects intercuspated into Articulation Paper strips to mark occlusal contacts on their maxillary posterior teeth, followed by taking photographs. Then each subject made a multi-bite digital occlusal force percentage recording. The surface area of the largest and darkest Articulation Paper mark (n = 240 marks) in each quadrant (n = 60 quadrants) was calculated in photographic pixels, and compared with the force percentage present on the same tooth. RESULTS Regression analysis shows a bi-variant fit of force % on tooth (P<.05). The correlation coefficient between the mark area and the percentage of force indicated a low positive correlation. The coefficient of determination showed a low causative relationship between mark area and force (r(2) = 0.067). The largest Paper mark in each quadrant was matched with the most forceful tooth in that same quadrant only 38.3% of time. Only 6 2/3% of mark surface area could be explained by applied occlusal force, while most of the mark area results from other factors unrelated to the applied occlusal force. CONCLUSION The findings of this study indicate that size of Articulation Paper mark is an unreliable indicator of applied occlusal force, to guide treatment occlusal adjustments.
Robert B Kerstein - One of the best experts on this subject based on the ideXlab platform.
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relationship between Articulation Paper mark size and percentage of force measured with computerized occlusal analysis
The Journal of Advanced Prosthodontics, 2012Co-Authors: Sarah Qadeer, Robert B Kerstein, Ryan Jin Yung Kim, Jungbo Huh, Sang Wan ShinAbstract:PURPOSE Articulation Paper mark size is widely accepted as an indicator of forceful tooth contacts. However, mark size is indicative of contact location and surface area only, and does not quantify occlusal force. The purpose of this study is to determine if a relationship exists between the size of Paper marks and the percentage of force applied to the same tooth. MATERIALS AND METHODS Thirty dentate female subjects intercuspated into Articulation Paper strips to mark occlusal contacts on their maxillary posterior teeth, followed by taking photographs. Then each subject made a multi-bite digital occlusal force percentage recording. The surface area of the largest and darkest Articulation Paper mark (n = 240 marks) in each quadrant (n = 60 quadrants) was calculated in photographic pixels, and compared with the force percentage present on the same tooth. RESULTS Regression analysis shows a bi-variant fit of force % on tooth (P<.05). The correlation coefficient between the mark area and the percentage of force indicated a low positive correlation. The coefficient of determination showed a low causative relationship between mark area and force (r(2) = 0.067). The largest Paper mark in each quadrant was matched with the most forceful tooth in that same quadrant only 38.3% of time. Only 6 2/3% of mark surface area could be explained by applied occlusal force, while most of the mark area results from other factors unrelated to the applied occlusal force. CONCLUSION The findings of this study indicate that size of Articulation Paper mark is an unreliable indicator of applied occlusal force, to guide treatment occlusal adjustments.
Ryan Jin Yung Kim - One of the best experts on this subject based on the ideXlab platform.
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relationship between Articulation Paper mark size and percentage of force measured with computerized occlusal analysis
The Journal of Advanced Prosthodontics, 2012Co-Authors: Sarah Qadeer, Robert B Kerstein, Ryan Jin Yung Kim, Jungbo Huh, Sang Wan ShinAbstract:PURPOSE Articulation Paper mark size is widely accepted as an indicator of forceful tooth contacts. However, mark size is indicative of contact location and surface area only, and does not quantify occlusal force. The purpose of this study is to determine if a relationship exists between the size of Paper marks and the percentage of force applied to the same tooth. MATERIALS AND METHODS Thirty dentate female subjects intercuspated into Articulation Paper strips to mark occlusal contacts on their maxillary posterior teeth, followed by taking photographs. Then each subject made a multi-bite digital occlusal force percentage recording. The surface area of the largest and darkest Articulation Paper mark (n = 240 marks) in each quadrant (n = 60 quadrants) was calculated in photographic pixels, and compared with the force percentage present on the same tooth. RESULTS Regression analysis shows a bi-variant fit of force % on tooth (P<.05). The correlation coefficient between the mark area and the percentage of force indicated a low positive correlation. The coefficient of determination showed a low causative relationship between mark area and force (r(2) = 0.067). The largest Paper mark in each quadrant was matched with the most forceful tooth in that same quadrant only 38.3% of time. Only 6 2/3% of mark surface area could be explained by applied occlusal force, while most of the mark area results from other factors unrelated to the applied occlusal force. CONCLUSION The findings of this study indicate that size of Articulation Paper mark is an unreliable indicator of applied occlusal force, to guide treatment occlusal adjustments.
