Utilização de um paralelómetro intraoral em prótese fixa

Abstract

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.

Date of Award	9 Dec 2016
Original language	Portuguese
Awarding Institution	Universidade Católica Portuguesa
Supervisor	Helder José Martins Esteves (Supervisor) & José Pinto de Azevedo (Co-Supervisor)