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Authors
Abstract(s)
Introdução: A eficiência mastigatória pode ser medida de diversas formas, destacando-se pela sua simplicidade através da determinação das áreas de contacto oclusais. A utilização de métodos digitais veio facilitar a recolha de dados, contudo verifica-se que há pouca informação sobre eficiência e áreas de contacto na literatura.
Objetivos: Determinação da área de contato oclusal de uma população universitária e as suas associações com o género, índice de VERT, realização de tratamento ortodôntico, lado de preferência mastigatório e a classe molar.
Materiais e Métodos: Registaram-se as mordidas de cada participante em silicone. Estas foram fotografadas e tratadas digitalmente com calibração de espessuras segundo a escala de cinzas. Com o programa ImageJ determinou-se as áreas de contacto. O índice de VERT foi calculado pela cefalometria e as restantes variáveis questionadas ao paciente. Procedendo-se à análise estatística, com um nível de significância de 0,05.
Resultados: Obteve-se uma área de contacto média de 71,33±53,34 mm2 e um mínimo e máximo de 5,10 mm2 e 244,19 mm2, respetivamente. Não se encontraram diferenças significativas entre a área de contacto e o género, índice de VERT, realização de tratamento ortodôntico, lado de preferência mastigatório e a classe molar.
Conclusões: Encontrou-se um coeficiente de variação elevado, 99%, e níveis preocupantes de áreas de contacto de alguns participantes, com 5 (14%) a apresentar menos de 10% e 13 (38%) com menos de 50% da área considerada ideal. Há necessidade de aprofundar este estudo, no sentido de perceber as variáveis relacionadas com este problema.
Introduction: Masticatory efficiency can be measured in several ways, emphasizing its simplicity through the determination of occlusal contact areas. The use of digital methods facilitated the collection of data, however, there is a lack of information on efficiency and contact areas in the literature. Objectives: Determination of occlusal contact area of a university population and its associations with gender, VERT index, orthodontic treatment, masticatory preference side and molar class. Materials and Methods: The occlusal registration of each participant was recorded in silicone. These were photographed and treated digitally with thickness calibration according to the grey scale. With the ImageJ program the contact areas were determined. The VERT index was calculated by cephalometry and the remaining variables questioned to the patient. Statistical analysis was performed, with a significance level of 0.05. Results: The values obtained was a mean contact area of 71.33 ± 53.34 mm2 and a minimum and maximum of 5.10 mm2 and 244.19 mm2, respectively. No significant differences were found between the contact area and gender, VERT index, orthodontic treatment, masticatory preference side, and molar class. Conclusions: There was a high coefficient of variation (99%) and worrying levels of contact areas of some participants, with 5 (14%) presenting less than 10% and 13 (38%) with less than 50% of the ideal area considered. Further studies are needed to understand the variables related to this problem.
Introduction: Masticatory efficiency can be measured in several ways, emphasizing its simplicity through the determination of occlusal contact areas. The use of digital methods facilitated the collection of data, however, there is a lack of information on efficiency and contact areas in the literature. Objectives: Determination of occlusal contact area of a university population and its associations with gender, VERT index, orthodontic treatment, masticatory preference side and molar class. Materials and Methods: The occlusal registration of each participant was recorded in silicone. These were photographed and treated digitally with thickness calibration according to the grey scale. With the ImageJ program the contact areas were determined. The VERT index was calculated by cephalometry and the remaining variables questioned to the patient. Statistical analysis was performed, with a significance level of 0.05. Results: The values obtained was a mean contact area of 71.33 ± 53.34 mm2 and a minimum and maximum of 5.10 mm2 and 244.19 mm2, respectively. No significant differences were found between the contact area and gender, VERT index, orthodontic treatment, masticatory preference side, and molar class. Conclusions: There was a high coefficient of variation (99%) and worrying levels of contact areas of some participants, with 5 (14%) presenting less than 10% and 13 (38%) with less than 50% of the ideal area considered. Further studies are needed to understand the variables related to this problem.
Description
Keywords
Oclusão Área de contacto Eficiência mastigatória e biótipo facial Occlusion Contact area Masticatory efficiency and facial biotype