Preliminary In Vitro Study on O-Ring Wear in Mini-Implant-Retained Overdentures.

نویسندگان

  • Carolina Andrade Chaves
  • Raphael Freitas Souza
  • Tatiana Ramirez Cunha
  • Maria Paula Vecchia
  • Adriana Barbosa Ribeiro
  • João Felipe Bruniera
  • Yara Teresinha Silva-Sousa
چکیده

This preliminary in vitro study evaluated the simulated retention force of O-rings used for mini-implant overdenture treatment and the effect of mechanical fatigue corresponding to 6 months of wear. A mandibular overdenture analog device was attached to two mini-implants and underwent a tensile strength test before and after the application of insertion-removal and simulated masticatory cycles. Insertion-removal cycles led to a retention loss of 24%, whereas masticatory cycles did not influence retention. Micro-CT scans showed minor deformation following mechanical cycling, but the changes were milder than those observed in similar clinical specimens. Both experimental loading methods led to physical changes in the O-rings, which explains in part the similar clinically observed wear.

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عنوان ژورنال:
  • The International journal of prosthodontics

دوره 29 4  شماره 

صفحات  -

تاریخ انتشار 2016