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Updated: Jul 17, 2026
Evaluating the Effects of Different Polishing Methods on Color Stability of Dental Restorations in Pediatric Dentistry
Published on: June 6, 2025
Self-bonding polymers as surface coatings of restorative resins to prevent staining
Sang E Park1, Hans-Peter Weber, Shigemi Ishikawa-Nagai
1Harvard School of Dental Medicine, Boston, MA, USA. sang_park@hsdm.harvard.edu
Objective:
Discoloration caused by staining of resin restorations can pose a serious esthetic problem. The aim of this study was to evaluate the efficacy of a self-bonding polymer (KISSCARE) in reducing extrinsic stains in an in vitro study model.
Methodology:
Thirty-six specimen disks were prepared using a composite resin (Vitalescence: shade A2 and A4), and divided into three experimental groups with different surface coatings: Group 1--Control (no coating); Group 2--Self-bonding polymer (SBP; KISSCARE Concentrated Gel), and Group 3--Composite Sealer (PermaSeal). These groups were further divided into Brushing and Non-brushing subgroups. The specimens in the Brushing groups were brushed daily with 40 strokes in two directions at a 90-degree angle using a toothbrush. Specimens were immersed in a coffee solution at 37 degrees C in a dark environment for 10 days. The color changes of each group were quantitatively measured using a spectrophotometer. Means and standard deviations were calculated, and data were analyzed using ANOVA/Scheffe post-test.
Results:
The SBP group showed less color change compared to the Control and the Sealer groups (p < 0.05). The Sealer group resulted in greater discoloration compared to the Control and the SBP group (p < 0.01).
Conclusion:
Application of self-bonding polymers was an effective method of surface coating in reducing staining of restorative resins, especially in the absence of brushing procedures.
