EVOLUTION OF THE BACKLASH OF METAL INSERTS THREADED METAL-BONE

João Andrade Lopes de Sousa¹; Gracilene dos Santos Aquino Pontes¹; Nícolas Matheus da Fonseca Tinoco de Souza Araújo¹; Rômulo Martins Ponte¹; João Telésforo Nóbrega de Medeiros¹

¹ Universidade Federal do Rio Grande do Norte

doi:10.20906/CPS/CON-2016-1432

Resumo

Mechanical Engineering has supplied to Medical Sciences new technologies in oral and chirurgical rehabilitation processing, in which the patients can recover their functionality, self-esteem and healthiness. This paper aims to do an analogy of screw-loosening considering the backlash evolution as a function of number of cycles of impacts, effect which is completely undesirable in a metal-bone union. The experimental test rig developed constitutes a Mechanical Simulator which uses bone specimen, since its bone structure has analogous properties relative to humans. For this purpose, maxillary bones of pigs are used to simulate analogous human bones. Scientific bridges between Engineering and Odontomedical fields have developed methods that contribute to solve uncomfortable injuries as those caused by the use of an implant (screw-loosening, screw-fracture, base-fracture and so).

Palavras-chave: Joint; metal-bone; backlash; masticatory test rig