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Surface characterization of current composites after toothbrush abrasion
Rena Takahashi1, Jian Jin, Toru Nikaido
1Cariology and Operative Dentistry, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan. renatakahashi@hotmail.com
Dental Materials Journal
|February 2, 2013
Summary
Toothbrush abrasion significantly increased surface roughness and reduced gloss in most dental composites. Clearfil AP-X, however, maintained its surface integrity and gloss, indicating superior durability against abrasive wear.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Surface Characterization
Background:
- Dental composites are widely used restorative materials.
- Evaluating their surface properties after abrasive challenges is crucial for clinical longevity.
- Toothbrush abrasion is a common factor affecting the surface integrity and aesthetics of composites.
Purpose of the Study:
- To assess the impact of toothbrush abrasion on the surface roughness and gloss of various dental composites.
- To compare the performance of nanohybrid, microhybrid, and organically modified ceramic composites under simulated brushing conditions.
Main Methods:
- Five types of dental composites were tested: two nanohybrids, two microhybrids, and one organically modified ceramic.
- Specimens were polished and then subjected to powered toothbrush abrasion using a standardized dentifrice slurry.
- Surface roughness was measured using a profilometer, and gloss was measured using a glossmeter before and after abrasion.
Main Results:
- All tested composites, except Clearfil AP-X, exhibited a significant increase in surface roughness and a decrease in gloss post-abrasion.
- Clearfil AP-X demonstrated resistance to surface degradation and gloss reduction.
- No significant association was found between surface roughness and gloss (R²=0.191, p<0.001).
Conclusions:
- Toothbrush abrasion negatively affects the surface properties of most contemporary dental composites.
- Clearfil AP-X shows superior resistance to toothbrush abrasion compared to the other evaluated materials.
- Material selection may be critical for maintaining the surface aesthetics and integrity of dental restorations over time.
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