Effect of the curing cycle on some properties of a polymethylmethacrylate denture base material
- 1 April 1978
- journal article
- Published by Wiley in Journal of Oral Rehabilitation
- Vol. 5 (2), 151-157
- https://doi.org/10.1111/j.1365-2842.1978.tb01208.x
Abstract
The properties of a denture base material may be modified by altering both the temperature and the time of heating during the curing cycle. In this study a polymethylmethacrylate denture base containing no crosslinking agent was polymerised using four different curing cycles. The structure of the materials so obtained was investigated by an acid etching technique. The materials were characterized with respect to degree of cure, strength and water sorption. It was concluded that: 1. No correlation was observed between the curing cycles and polymer structure. 2. The curing cycle of 7 h at 70°C plus 1 h at 100°C produced best indentation strength and tensile strength. 3. A correlation was observed between residual monomer, indentation resistance, tensile strength and water sorption. This suggested that residual monomer concentration is the most important parameter in the determination of the properties of the material investigated in this study.Keywords
This publication has 4 references indexed in Scilit:
- Molecular weight distribution of denture base acrylicJournal of Dentistry, 1975
- The absorption of water by acrylic resins and other materialsThe Journal of Prosthetic Dentistry, 1964
- The Detection and Estimation of Residual Monomer in Polymethyl MethacrylateJournal of Dental Research, 1956
- Effects of Time and Temperature on Polymerization of a Methacrylate Resin Denture BaseThe Journal of the American Dental Association, 1949