비고정성 연결장치의 위치에 따른 고정성 보철물의 응력분석

A STRESS ANALYSIS OF FIXED PROSTHESES WITH VARIOUS ORIENTATION OF NONRIGID CONNECTOR

Finite element models were constructed to analyze the mechanical behavior of a three unit fixed partial denture (FPD) with a 2nd premolar and 2nd molar abutment either employing a rigid and nonrigid connector. Gap elements were used to model the clearance space of the nonrigid connector. 1. High stress was generated in the FPD and supporting abutment around the rigid connector. 2. The pattern of stress and deflection is very similar between vertically and 20 degree mesially tilted nonrigid connector at the distal aspect of premolar abutment. 3. FPD with an inverted nonrigid connectors exhibited the worst undesirable mechanical stress states and deformations. 4. Nonrigid connector of normal orientation transmit the load to the abutment tooth, but inverted connector doesn't transmit the force.