Document Type : Original Article


1 Assistant Professor of Restorative Dentistry Department of Restorative Dentistry, School of Dentistry Kerman University of Medical Sciences

2 resident of operative dentistry in kerman dental school

3 Associate Professor of restorative dentistry Department of Restorative Dentistry Kerman University of Medical Science

4 Prosthodontics department, School of dentistry, Shiraz University of Medical Sciences, Shiraz, Iran

5 private dentist


Objectives: In order to reduce the composite stickiness to instrument and to facilitate composite modelling, clinicians have to use several lubricants. This study evaluated the effect of instrument lubricant on the color stability of a resin composite after one-month water storage.

Materials and Methods: 60 disc-shaped specimens (2×10 mm) of Tetric N-ceram composite were prepared using four lubricants, isopropyle alcohol 70%, Adper Single Bond Adhesive (SB), Margin Bond (MB) and Composite Wetting Resin (CW) (12 samples for each group). No Lubricant was used in control group. Color measurement was done 24 hours after sample preparation and after one-month water storage. Color differences were calculated and the data were analysed by ANOVA and Tukey's Post-hoc tests.

Results: The use of Single Bond as instrument lubricant caused the most color changes (ΔE=4.26) and control group (No lubricant) showed the least color changes (ΔE=1.77). The use of Composite Wetting Resin as instrument lubricant resulted in lower color change as compared with other instrument lubricants. (P<0.05)

Conclusion: Composite Wetting Resin used as instrument lubricant had the better color stability compared with other lubricants. The use of bonding agents as instrument lubricant is not recommended for composite restorations due to a bigger risk of affecting color stability .
Significance: Clinicians should be aware that using instrument lubricants might influence the color properties of dental composites


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