Effect of different curing temperatures on the distortion at the posterior peripheral seal: An in vitro study

摘要: Context: Most of the maxillary complete dentures do not adapt accurately to cast because changes in resin during polymerization. The amount heat associated with processing polymethyl methacrylate has been correlated adaptation processed denture base its supporting tissues. Aims: This study conducted determine effect different curing temperatures on accuracy fit a and compare that fiber-reinforced acrylic resins. Materials Methods : An ideal rubber mould used make an edentulous cast. Forty-eight stone casts made from mould. Out 48 identical casts, 44 wax adapted using simple resin. remaining four were However, time for 12 hrs was maintained constant all samples. variable investigate temperature. Therefore, bases at each temperature 60°C 80°C two-degree increments total samples Remaining 70°C A traveling microscope measure discrepancy between base. Statistical analysis used: Analyzed Student's unpaired t test. Results Minimum distortion observed 70°C. Maximum 80°C. Amount increases as which highly significant. Distortion significantly high 60 68°C decreasing order. Conclusion: verified observation show greatest central portion posterior palatal seal region increases.