A comparative study of dimensional stability of two popular commercially used denture base resins

Abstract

Background: A good dimensional stability is a necessary prerequisite for successful complete denture retention and its functional efficacy. This study was conducted keeping in mind the cost factor and the need of a common man. Out of many available products, conventional heat cure resin (Dental Products of India [DPI] and Lucitone 199 [LUC]) are the standard of choice. For suitable understanding of these two products in accordance to the above-stated statement, the current study was conducted. Aim: This in vitro study was carried out to compare the dimensional stability of commercially available polymethylmethacrylate (PMMA) DPI and high-impact LUC denture base materials processed using a long curing cycle, with and without terminal boiling. Methodology: By using a chrome cobalt metal base plate, a total of forty specimens of acrylic base plates were fabricated. They consisted of two major groups of twenty specimens each, fabricated from conventional heat cure DPI and LUC heat cure resins. Each group so fabricated was further subdivided into two equal subgroups of ten specimens each, which were subjected to long curing cycle, with and without terminal boiling. The results for each group were compared by paired sample t-test for the studied objective, and data were analyzed by SPSS software version 20 (IBM Corporation, Armonk, NY USA). The level of statistical significance was fixed at the customary level ≤0.05. Results: The dimensional stability values of LUC were found superior (P Conclusion: PMMA reinforced with butadiene styrene fabricated using long curing cycle with terminal boiling showed the highest value of dimensional stability and the least was seen with conventional PMMA processed with long curing cycle without terminal boiling.