Objective To explore better materials and methods for restoring deep dental wedge-shaped defects. Methods 486 teeth in 189 cases with wedge-shaped defects were randomly divided into three groups which were restored with glass inomer cement restoration, light-cured composite resin restoration and the sandwich technique respectively. Evaluation was made after restoration for 1 to 2 years respectively. Results The successful rates of glass inomer cement restoration, light-cured composite resin restoration and the sandwich technique after 1 to 2 years were 89.66%, 84.72%, 93.46% and 69.17% , 82.22%, 90.28% respectively. The successful rate of the sandwich technique group was higher than that of the other two groups. Conclusion The clinical curative effect of the sandwich technique for restoring deep dental wedge-shaped defects was better.
