Abstract:

Objective To evaluate the effects of different dental filling materials in wedge-shaped defect restorations of maxilla premolars （54|45）on periodontal tissues.MethodsForty patients (160 teeth) with wedge-shaped defect （54|45）of maxilla premolars were selected, and four different maxilla premolars of each patient were randomly filled with glassionomer (GI group), rensin-modified glass-ionomer (RMGI group), polyacid-modified composite resin/compomer (PMCR group) and composite resin (CR group), respectively. The periodontal health indexes including amount of gingival crevicular fluid and activity of aspartate aminotransferase and alkaline phosphatase in gingival crevicular fluid of tested teeth were recorded before restorations and one week, one month and six months after restorations. Results Compared with those before restorations, the amount of gingival crevicular fluid significantly increased in each group after restorations, and the activity of aspartate aminotransferase and alkaline phosphatase in gingival crevicular fluid also significantly increased (P<0.05). Before restorations and one week after restorations, there was no significant difference in each index among four groups (P>0.05). One month and six months after restorations, the indexes of GI group were significantly higher than those of the other groups (P<0.05), while the indexes of PMCR group were significantly lower than those of the other groups (P<0.05). Conclusion All the four commonly used dental filling materials have adverse effects on periodontal tissues after restorations of wedge-shaped defect (54|45), and adverse effects from restorations with GI may be most significant.

Key words: filling materials, wedge-shaped defect, gingival crevicular fluid, aspartate aminotransferase, alkaline phosphatase