[Clinical effect of two different composite resins in filling Class IV cavity].

Purpose: To compare the clinical effect of Clearfil AP-X(TM) and 3M Filte k(TM) Z350 in filling Class IV cavity.

Methods: 200 teeth were divided into two groups after class-IV cavity preparation according to composite resin filling technique. These teeth were then filled by Clearfil AP-X(TM) (with Clearfil SE Bond) and 3M Filtek(TM) Z350 (with 3M Adper Prompt Bond) step by step according to the instruction manual. The clinical effect was evaluated and compared after 3 months, 6 months, 1 year and 2 years respectively. The data were collected and analyzed with USPH&Ryge evaluation standard and SPSS13.0 software package.

Results: The result indicated that there was no significant difference between the two group at half a year and 1 year. At 2-year there was significant difference in secondary caries occurrence,attrition, marginal discrepancy, marginal color and color matching between them, 3M group was better than clearfil group, but there was no significant difference in other indexes between them.

Conclusions: When filling Class IV cavity, compared to Clearfil AP-X(TM), 3M Filtek(TM) Z350 has more advantages, and worthy of wider clinical application.