[Stress analysis for the abutments and the supporting alveolar bone in semi-fixed bridge]

This research was made in a mandibular that simulated dynamic relationship between occlusion,masticatory muscles and TMJ and that has full and normal teeth excepting the right second premolar was lost.This study measue\red and analysed the stress distribution and changing in the abutments and the supporting alveolar bone with strain gauge when the edentulous are was restored by T-type attachment and rest type connectors semifixed bridge.The results suggested that:(1)The stress of the abutment and alveolar bone increased by prematurity and it's distribution and changing were different according to the place of prematurity and type of the connectors.(2) T-type connecter has stress broken action and rest connector hasn't obvious such an action when prematurity of central occlusion.