Objective:To evaluate the effectiveness of proximal edge lifting in the onlay restoration of subgingival defects.Methods:A total of 113 patients with subgingival defects admitted to our hospital from January 2022 to November 2022 were selected,with 1 affected tooth selected for each patient.Patients were divided into control group(n=56,conventional onlay restoration)and observation group(n=57,onlay restoration after proximal edge lifting)using a simple random number table method.Restoration effect,chewing function,gingival condition and patients'satisfaction were compared between the two groups.Results:6 months and 12 months after restoration,there were no significant differences in fracture,retention,edge coloring,edge adhesion,integrity and secondary caries between the two groups(P＞0.05).Within 12 months after restoration,there was no secondary caries in the observation group.There were 2 cases of fracture B(3.51％),3 cases of marginal staining B(5.26％),and 1 case of dental integrity B(1.75％).In the control group,there were 3 cases of grade B secondary caries and 1 case of food Mosaic.At the 6th and 12th months after restoration,the masticatory efficiency of the observation group was higher than that of the control group,and the GI and PLI values were lower than those of the control group(P＜0.05).The total satisfaction of the observation group was higher than that of the control group(P＜0.05).Conclusion:The proximal edge lifting technique has a good clinical effect in the onlay restoration of subgingival defect,which can improve the masticatory function and gingival condition of patients with high satisfaction.
维普
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