The effect of brushing on surface finish of two different indirect composite resin systems finished by polishing and glazing - An invitro study

• Author Details:   
• Padmini Roja Raavi ^*
• Mahendranadh Reddy Kareti
• Venkat Aditya

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Background: Composite restorations are being used in dentistry due to their good optical and mechanical properties, however, they exhibit poor wear resistance property when used as posterior restorative material. To overcome this drawback indirect composites were introduced. Daily tooth brushing causes abrasion of poorly finished surfaces of indirect composite. The aim of the study was to assess the effect of brushing on surface roughness and surface finish of two different indirect composite resin systems finished by polishing and glazing.
Materials and Methods: The Specimens were divided into group A and group B with a sample size of 15 in each group. Group A specimens were fabricated using Crea.lign indirect composite resin system and group B specimens were fabricated using GC Gradia indirect composite resin system. Baseline surface roughness measurements (Ra) were noted using contact profilometer before brushing simulation. These samples were subjected to brushing simulation and final surface roughness measurements were noted and compared with the baseline surface roughness measurements. The obtained data was tabulated for statistical analysis.
Results: Wilcoxon signed rank test was used to compare the mean surface roughness values of group A and group B before and after brushing. The test revealed that there was a statistical difference (P<0>
Conclusion: Group A specimens produced greater mean surface roughness values before and after brushing simulation when compared to group B specimens whereas the surface finish produced by group B specimens (glazed group) was better than surface finish produced by group A specimens (polished group).

 Keywords:  Composites, Polishing, Glazing.