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目的对牙冠缺损至龈下的患牙分别进行牙冠延长术和牙龈切除术,比较两种手术术后临床修复治疗的效果。方法选择37颗牙冠缺损至龈下的牙齿分为两组,A组24颗行牙冠延长术,6周后行修复治疗;B组13颗行牙龈切除术,2周后行修复治疗。两组患牙均于修复后6个月、18个月各复查一次进行随访,检查修复体固位情况及牙周情况。结果A组成功率75.0%~83.3%;B组成功率23.1%。结论保存缺损至龈下的残根残冠时,牙冠延长术显著优于牙龈切除术。
Objective To perform crown extension and gingival excision on the affected teeth from the defect of the crown to the subgingival, and to compare the clinical effects of the two operations. Methods Twenty-seven crowns of teeth with subgingival defects were divided into two groups. A group of 24 crow’s feet were crowded. Six weeks later, prosthesis was repaired. Group B received gingival resection and repaired after two weeks. Two groups of teeth were restored at 6 months, 18 months after the review of a follow-up examination of prosthesis retention and periodontal conditions. Results A group success rate of 75.0% to 83.3%; B group success rate of 23.1%. Conclusions Crown preservation is significantly better than gum excision in preserving the residual residual crown to the subgingival.