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Dimensional accuracy and stability of acrylic resin denture bases
R Huggett1, A Zissis, A Harrison
1Department of Prosthetic Dentistry and Dental Care of the Elderly, University of Bristol, Dental School, England.
Abstract:
Proponents of injection molding systems have claimed a number of benefits over conventional press-pack dough molding systems. The aim of this study was to evaluate a recently developed injection (dry heat) procedure of processing compared with press-pack dough molding utilizing three curing cycles. The dimensional accuracy and stability of acrylic resin bases produced by the two molding procedures were compared. Dimensional changes were assessed over a period of 4 months using an optical comparator. The results demonstrate that baseplates produced by the injection molding procedure exhibit less shrinkage than those produced by the conventional press-pack procedures.