O comportamento mecânico de uma tela ortodôntica para contenções periodontais: um estudo em modelos experimentais

Abstract

The present study aimed to evaluate the mechanical behavior of the orthodontic mesh for base, mesh 80, wire ø0.12 mm, for a possible indication in dental retention. The objective was also to evaluate the swine model as a test specimen for studies in the area of dentistry. Methods: Forty-five periodontal retainers were made in swine teeth, subjected to resistance test to mechanical shear force in E-mic machine and, subsequently, classified according to the Adhesive Remnant Index. Results: The use of swine models proved to be adequate for carrying out the study. The test specimens presented a maximum average shear strength of 317 MPa and a median of 295 MPa. 95.5% of the retainers studied presented an adhesive remnant index score of 2 or 3, therefore, they are capable of complete repair, even after having been subjected to the force test. Conclusions: The use of a swine mandibular segment proved to be effective for carrying out the study and the mechanical behavior of the mesh used is compatible with a possible indication for dental retention.