Influence of ridge type on mandibular distal extension removable partial denture.

摘要: The aim of this study was to use photoelastic models analyze the distribution stress caused by incidence loads on a mandibular distal extension removable partial denture, both abutment teeth and differently shaped residual ridges: ascending, descending-ascending, horizontal descending. best type retainer location rest last tooth were determined for different types ridge. Four made from resin (PL-1 PL-2 alveolar ridge), one each kind For model, 4 dentures (RPD) (16 RPD altogether): T-bar rest, mesial circumferential rest. placed circular polariscope 100 N axial load (point load) applied premolars molars RPD. formation bands photographed qualitative analysis. Results showed that ridge had better stress, while descending greater concentration stress. areas all ridges except ridge, where there no influence related type. similar among when or tooth, located distally tooth. Thus, it may be concluded (1) situation least favorable most (2) more distribution, horizontal, in which case relation retainer, (3) behavior