EFFECT OF ULTRASONIC SCALING ON THE SURFACE ROUGHNESS OF DIFFERENT RESTORATIVE MATERIALS

Abstract

The surface roughness of dental restorative materials has a crucial effect on the health of dental and periodontal tissues as well as for the longevity of restorations.

Aim: This study evaluated the effect of ultrasonic scaling on surface roughness of four different tooth-colored class V restorations.

Material and method: Out of 48 freshly extracted human teeth, 12 teeth were randomly selected for each group.

marked with the outline of class V cavity. Class V cavities were prepared on the facial surfaces of teeth of all groups except the control group. These cavities were then restored with GIC, Nanohybrid composite (Filtek Z 250 XT) and Nanofilled (Filtek Z 350 XT) composite. All the specimens were stored in artificial saliva at 370 C for 1 month. Initial surface roughness values (Ra in um) of restorations were evaluated with the surface roughness tester. Ultrasonic instrumentation was then carried out for 60 s on the restoration surface and final roughness values were evaluated. Data were analyzed with Paired t-test, One-way ANOVA.

Results: Mean Pre-instrumentation surface roughness was highest with GIC, whereas it was least in case of Filtek Z 350 XT. Mean post-instrumentation surface roughness was highest with GIC, whereas it is least in case of Filtek Z 350 XT.

Conclusion: Highest surface roughness was seen in GIC, followed by control group, Nanohybrid (Filtek Z250 XT) and Nanofilled group (Filtek Z350 XT) when subjected to ultrasonic scaling.