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Effect of polishing instruments on the
surface roughness of nanofilled resin
composite
Authors :
- Karn Pipatpunyanugoon
- Wichaya Wisitrasameewong
- Vasana Patanapiradej D.D.S., M.D.S., Diplomate, Thai Board of Operative Dentistry
Abstract :
Objective To evaluate the effect of different polishing instruments on the surface roughness of a
nanofilled resin composite.
Materials and methods Resin composite, Filtek Z350®, was condensed in an 5x4x2 mm3 block
covered with a Mylar strip and then was polymerized with a curing unit for 40 seconds. One hundred
and twenty specimens were randomly divided into six groups equally. The first group was a control.
The others were polished with Sof-Lex® (3M), Enhance® (Dentsply), Pogo® (Dentsply), Composhape®
(Intensiv) and Jet bur® (Kerr). The average surface roughness (Ra) was measured with a surface
roughness tester after polishing. Surface roughness of a sample from each group was assessed using
a scanning electron microscope. Data were analyzed by One-way ANOVA, at p < 0.05.
Results The Sof-Lex® group demonstrated the smoothest surface which was not statistically
different from the control group. However, surfaces polished with Pogo®, Enhance®, Composhape®
and Jet bur® showed a statistically higher average surface roughness than the control group,
respectively (p < 0.05).
Conclusion Nanofilled resin composite displayed variable roughness depending on the polishing
instruments used. Sof-Lex® gave the best polished surface.
(CU Dent J. 2008;31:213-22)
Keywords :
nanofilled resin composite; polishing instruments; surface roughness
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