COMPARATIVE EVALUATION OF THE EFFECT OF ULTRASONIC SCALING ON THESURFACE ROUGHNESS OF TWO DIFFERENT TOOTH COLOURED CLASS VRESTORATIONS. AN IN VITRO STUDY

Abstract

Aim: The aim of study is to evaluate the effect of ultrasonic scaling on surface roughness of two different toothcolored Class V restoration. Materials and method: 30 freshly extracted human teeth were taken and divided into 3 groups of 10 each. Control group were marked with area of 2 x 2 mm outline of class Vcavity. In Group 2 and 3 Class V cavities were prepared with an outline of dimensions (2mm depth 2mm length and 2mm width) on facial surface with carbide bur no. 245 and restored with two different tooth colored restorative materials, Group 1: Control group Group 2: Restored with Fuji II GL(GC) Group 3: Restored with Filtek Z250 XT COMPOSITE (3M ESPE) All specimens were stored in artificial saliva at 37°C for one week. Initial surface roughness value (Ra in µm) of restorations was evaluated with Surface Roughness Tester. Ultrasonic instrumentation was then carried out on the restoration surface and a final surface roughness value was evaluated. Data was then statisticallyanalyzed with ANOVA and Post hoc test. Result: GIC Fuji IIGL had highest, whereas Nanohybrio composites Filtek Z250 XT had lowest pre- and post-instrumentation roughness values. Conclusion: Nanohybrid composites are found to withstand instrumentation better than GIC.