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目的探讨牙冠延长术在牙体缺损达龈下患牙中的应用。方法选择60例冠缺损达龈下的前牙,分为浅、深缺损组,均采用牙冠延长术,术后6周对残根残冠进行桩核冠修复。追踪随诊1 a,比较其修复质量。结果浅缺损组较深缺损组成功率有显著增高(P<0.05)。结论牙冠延长术有利于残根残冠的保留和修复,但选择适应证应慎重。
Objective To investigate the application of crown extension in subgingival subgingival teeth. Methods Sixty cases of subgingival subgingival anterior teeth were selected and divided into shallow and deep defect groups. All of them were treated with crown extension, and postoperative crown and crown restoration was performed 6 weeks after the operation. Follow-up 1 a, compare the quality of their repair. Results The deep defect defect power of shallow defect group was significantly higher (P <0.05). Conclusions Crown extension is good for the retention and repair of residual canals, but the indications should be carefully chosen.