Objective:To evaluate the effectiveness of minimal flap surgery in the treatment sub-gingival caries ( class V cavities) . Methods:57 teeth(4 incisors, 13 canines, 38 premolars and 2 molars) with sub-gingival caries in 42 patients were treated by com-bined gingival flap surgery. Sub-gingival caries was fully exposed and the lesion was fully removed, then the deffects were filled with flowing resin. Before operation, 6 and 12 months after treatment, PD, SBI and gingival recession were examined. Results:Success rate of the treatment was 98. 25%. No statistically significant difference of the indexes was found during 12-month-follow up. Conclu-sion:Minimal flap surgery is effective for the treatment of sub-gingival caries ( class V cavities) .
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