Objective To compare the retention of the restorations of AP compomer used to restore the incisal corner defect directly with two different adhesives. Method 80 anterior teeth with incisal corner defect from 53 patients were divided into two groups according to different adhesive: Prime

&

Bond NT

TM for Group A and self-etching adhesive Adper

TM Prompt

TM for group B. All teeth were restored directly with AP compomer. The retention of the restorations was observed after 3 months

6 months and 1 year. Results After 3 months

the rate of broken-off restoration of group A and group B is 7.5 % and 5.0 % respectively. There was no significant difference between two groups （p

>

0.05）. After 6 months

the rate of broken-off restoration of group A and group B is 17.5 % and 12.5 % respectively. There was no significant difference between two groups （p

>

0.05）. After 1 year

the rate of broken-off restoration of group A and group B is 27.5 % and 17.5 % respectively .Group A had more broken-off restorations and there was significant difference between two groups （p

<

0.05）. Conclusion AP compomer had some curative effect when used to restore the incisal corner defect directly

and the retention of the restorations would be improved if self-etching adhesive was used.