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[A clinical evaluation of two new materials for restoration of dental wedge-shaped defects]
1Department of Stomatology, the Provincial Free Medical Clinics of Jiangxi, Nanchang 330046, China.
Objective:
To evaluate clinically two new materials (Dyract Cem and 3M-Vitremer) for restoration of dental wedge-shaped defects with modified USPHS evaluation criterion.
Methods:
317 teeth with wedge-shaped defects were restored by Dyract Cem and 192 teeth by 3M-Vitremer clinically. The 1 year and 2 year follow-up results were evaluated with modified USPHS evaluation criterion.
Results:
1 year successful rate was 91.17% in Dyract Cem group and 81.77% in 3M-Vitremer group, and 2 years successful rates were 88.64% and 80.21% separately. The differences of successful rates between the two groups are significant statistically, but there are no significant differences in main indexes except stain rate when analysed item by item with USPHS evaluation criterion. Successful rates were related with the abrasive degree of the restored teeth.
Conclusions:
Both Dyract Cem and 3M-Vitremer have high successful rates and a lot of advantages for restoration of dental wedge-shaped defects. The modified USPHS evaluation criterion is a valuable method for clinical evaluation.