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Microleakage of Class V compomer and light-cured glass ionomer restorations
W W Brackett1, T D Gunnin, R O Gilpatrick
1Department of General Dentistry, College of Dentistry, University of Tennessee-Memphis, USA.
Statement Of Problem:
Resin-modified (light-cured) glass ionomer and polyacid-modified composite resin (compomer) restorations are popular choices for the restoration of root caries and cervical abrasion/erosion lesions, but clinical studies are relatively few and have been published primarily as abstracts.
Purpose:
In the absence of adequate clinical data, the marginal integrity of restorations of the above two types of material was compared in vitro. The microleakage of restorations of two light-cured glass ionomer restorative materials and of one compomer material was evaluated.
Methods And Material:
Restorations of the three materials were placed in facial and lingual Class V cavity preparations in bovine incisors. All preparations were centered on the cementoenamel junction and were prepared with 45-degree enamel bevels. After thermal cycling, teeth were immersed in methylene blue dye, then sections of the restorations (n = 16) were visually evaluated.
Results:
Dye penetration was observed at approximately 20% of restoration margins for all three materials, with the greatest incidence of severe leakage in the compomer restorations.
Conclusion:
No significant difference in microleakage among the three materials (ANOVA; p > 0.05) was found.