Comparative Evaluation of Retentive Value of Tooth Supported Over Denture Made With Precision and Semi-Precision Attachments.

Abstract

Aim:To evaluate of retentive value of tooth supported over denture made with precision (Pre-fabricated) and semi-precision (Castable) attachments. Materials and Methods: 24 Acrylic edentulous models were prepared and randomly divided into 2 groups. Group group A consist of Pre-Fabricated Pivots were directly embedded in Acrylic Model with Auto-polymerized Resin. In group B Casting, Finishing & Polishing of Castable Pivots were done and embedded in Acrylic Model. Denture bases with three loops approximating incisor and molar regions were made for testing in each acrylic models. Yellow retentive caps (Rhein 83) and stainless steel housings (Rhein 83) were embedded in denture base using direct pick up technique. Three chains were attached to the Record base and a 3-point vertical pull was used to determine retention against a vertically directed dislodging force parallel to the path of insertion.