COMPARATIVE ANALYSIS OF SURFACE ROUGHNESS OF TWO DIFFERENT COMMERCIALLY AVAILABLE SELF CURE ACRYLIC RESIN MATERIAL POST EXPOSURE TO POLISHING KIT

Abstract

Introduction: Resin composites are one of the most popular materials in aesthetic dentistry because of their excellent aesthetic properties, adequate strength, and their ability to be bonded to dentin or enamel. They are highly cross linked polymeric materials reinforced by dispersion of glass, crystalline or resin filler particles or short fibres bound to the matrix by silane coupling agents. Surface roughness is significant since it affects microorganism aggregation and, as a result, also affects the oral health.

Aim: The main aim of the present study is to compare the surface roughness of two different commercially available self-cure acrylic resin materials post exposure to polishing kit.

Materials and Methods: 16 pellets of self-cure resin (DPI and ROLEX) were prepared with unified shape, diameter and thickness (10 x 10 x 4 mm). The self-cured acrylic resin material was packed into silicone molds invested with dental stone inside denture flasks. Then, cured according to the manufacturer’s instructions in the curing unit. Then, one surface of each specimen was finished using metal burs and stone wheel finishing burs mounted on a slow speed handpiece. Later, it was polished using poly buff brushes and polishing paste followed by a wet rag wheel with a slurry of pumice. The other surface was marked with a symbol and left unfinished to distinguish the experimental surface used to measure the roughness change of the material. The data was collected and statistically analysed using SPSS software version 22.0.  Descriptive analysis was used to calculate the summarised qualitative data and Chi Square test was used to analyse and compare the data of  the resin samples.

Results: The surface roughness of self-cure resin varied under different effects of pressure and polishing techniques. The different types of resin showed a mere difference in surface roughness after polishing.

Conclusion: After discussing the results of the present study, from the results we are able to conclude that the surface roughness of both the self-cure resins shows mere difference after polishing.