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Abstract(s)
Introdução: A prostodontia fixa é a área da Medicina Dentária que se ocupa do restabelecimento e manutenção da função mastigatória e estética.
O sucesso clínico passa sobretudo pela retenção e conservação da prótese na cavidade oral. A preparação dentária é a forma mais eficiente de reter a prótese, uma vez que a sua confeção obedece a regras explicitas, nomeadamente o ângulo de convergência, ângulo que duas paredes opostas formam entre si, e que deverá variar entre os 2º e os 6º.
No entanto, na prática, e por se tratar de uma margem de erro tão pequena, é muitas vezes difícil cumprir este parâmetro. Isto pode acontecer por dificuldades na visualização, devido à quantidade/ qualidade do remanescente dentário, ou até mesmo pela falta de experiência do Médico Dentista.
Objetivos: Criação e desenvolvimento de um paralelómetro de aplicação intraoral. Validação em clínica simulada do instrumento criado.
Materiais e Métodos: Procedeu-se ao desenvolvimento de um instrumento para auxiliar as preparações dentárias, através da utilização de um acelerómetro e de um giroscópio. Estes dois componentes foram incorporados numa placa base que posteriormente foi acoplada à turbina. Este dispositivo foi testado em ambiente de clínica simulada, em dentes de Frasaco. Participaram neste estudo 12 alunos do 5º ano, do Mestrado Integrado em Medicina Dentária, Centro Regional de Viseu da Universidade Católica Portuguesa. A prova consistia em realizar dois pares de sulcos mesio-distais e vestíbulo-linguais de forma paralela, recorrendo ao paralelómetro e ao sistema tradicional (a-olho). Após a realização deste teste os dentes foram cuidadosamente observados e analisados. As observações feitas foram estatisticamente comparadas com ajuda do programa estatístico IBM SPSS® statistics (IBM Corp Released 2011. IBM SPSS Statistics for Windows, Version 20.0 Armonk, NY: IBM Corp.).
Resultados: Na execução dos sulcos no sentido vestíbulo-lingual de molares e pré-molares obteve-se um erro significativamente menor (p<0.05), quando foi usado o paralelómetro em relação ao sistema tradicional (a-olho). Conseguiu-se uma resolução inferior a um grau na validação do paralelómetro Conclusão: Nas condições experimentais, o instrumento criado foi considerado útil.
Introduction: The fixed prosthodontics is the area of dentistry that deals with the restoration and maintenance of masticatory function and aesthetics. Clinical success is essentially the retention and preservation of the prosthesis in the oral cavity. The tooth preparation is the most efficient way to retain the prosthesis since it is confection follows explicit rules, including the angle of convergence, angle which two opposite walls form between them, which shall vary between 2º and 6º. However, in practice, and it is a margin of error so small, it is often difficult to meet this parameter. This can happen by difficulties in view, due to the quantity/quality of the tooth remaining, or even the lack of experience of the Dentist. Objectives: Creation and development of a parallelometer intraoral application. Validation in simulated clinical instrument created. Materials and Methods: The procedure was the development of an instrument for assisting dental preparations through the use of an accelerometer and a gyroscope. These two components were incorporated into a base plate which was subsequently coupled to the turbine. This device was tested in simulated clinical environment in Frasaco teeth. The sample consisted of 12 students of the 5th year of the MSc in Dental Medicine, Centro Regional de Viseu of Universidade Católica Portuguesa. The test was to perform two pairs of grooves mesio-distal and vestibule-lingual in parallel, using the parallelometer and eye. After this test the teeth were carefully observed and analyzed. The comments made were statistically compared with the help of statistical program SPSS (IBM Corp. Released 2011. IBM SPSS Statistics for Windows, Version 20.0 Armonk, NY:. IBM Corp.). Results: In the execution of the grooves in vestibule-lingual of molars and premolars obtained a significantly lower error (p <0.05) when it was used parallelometer over the traditional system (eye). It could be a lower resolution to a degree in the validation of parallelometer. Conclusion: Under the experimental conditions, the created instrument was considered useful.
Introduction: The fixed prosthodontics is the area of dentistry that deals with the restoration and maintenance of masticatory function and aesthetics. Clinical success is essentially the retention and preservation of the prosthesis in the oral cavity. The tooth preparation is the most efficient way to retain the prosthesis since it is confection follows explicit rules, including the angle of convergence, angle which two opposite walls form between them, which shall vary between 2º and 6º. However, in practice, and it is a margin of error so small, it is often difficult to meet this parameter. This can happen by difficulties in view, due to the quantity/quality of the tooth remaining, or even the lack of experience of the Dentist. Objectives: Creation and development of a parallelometer intraoral application. Validation in simulated clinical instrument created. Materials and Methods: The procedure was the development of an instrument for assisting dental preparations through the use of an accelerometer and a gyroscope. These two components were incorporated into a base plate which was subsequently coupled to the turbine. This device was tested in simulated clinical environment in Frasaco teeth. The sample consisted of 12 students of the 5th year of the MSc in Dental Medicine, Centro Regional de Viseu of Universidade Católica Portuguesa. The test was to perform two pairs of grooves mesio-distal and vestibule-lingual in parallel, using the parallelometer and eye. After this test the teeth were carefully observed and analyzed. The comments made were statistically compared with the help of statistical program SPSS (IBM Corp. Released 2011. IBM SPSS Statistics for Windows, Version 20.0 Armonk, NY:. IBM Corp.). Results: In the execution of the grooves in vestibule-lingual of molars and premolars obtained a significantly lower error (p <0.05) when it was used parallelometer over the traditional system (eye). It could be a lower resolution to a degree in the validation of parallelometer. Conclusion: Under the experimental conditions, the created instrument was considered useful.
Description
Keywords
Prótese parcial fixa Preparação dentária Coroas Prostodontia Fixed partial denture Tooth preparation Artificial thooth Prosthodontics