Ali Al EhaldebV* BDS, Msc
Hamdl Mohammed Al Tahawi ** , DDS, MSc, PhD, FICD, FADM
*Central Region, King Fahad National Guard Hospital, **College of Dentistry, King Saud University, Riyadh, Saudi Arabia

This study evaluated mlcroleakage of four tooth colored restorative systems. Conquest Crystal/Bond 1, FloRestore/Tenure Quick with fluoride, Compogiass/Syntac and Ketac - Molar Apllcap which are: a composite resin, a flowable composite, a compomer and a glass ionomer cement respectively.

Class V-like circular preparations (3 mm diameter, 1.5 mm deep) were prepared at the cemento-enamel junction of 40 extracted human premolar teeth. Ten cavities in each group were restored with one of the materials. Following 72 hours storage in a 37°C water bath, the restored teeth were thermocycled for 500 cycles between 5°C and 55°C for one minute in each cycle. Mlcroleakage was assessed by dye penetration using 0.2% basic fuchsin dye. The resu Its we reanalyzed using the Kruskal-Wal 11 s Test. No micro Ieakage was evident at the enamel margins as well as in the gingival margins. None of the systems evaluated were able to prevent mlcroleakage at the gingival margin (cementum) completely, but these systems were effective In minimizing mlcroleakage at the enamel restorative interface.

Saudi Dental Journal 2001;13(1):16-19.