冠延长术保存前牙龈下残冠的美学修复效果观察

目的: 观察冠延长术结合桩核冠修复治疗前牙龈下残冠的临床效果。方法: 选择前牙缺损患者25例（共28颗患牙）,缺损断面最低点均在龈缘下3 mm以内,经完善根管治疗后行冠延长术;术后8周开始桩核冠修复,随访观察修复后1、6、12个月的牙根松动度、牙周组织情况、修复体边缘和稳定性。结果: 随访1年,患者牙龈健康优于术前,术后修复成功率为89.28%。失败3颗,其中牙根松动1颗,牙龈退缩、冠边缘暴露2颗。结论: 牙冠延长术对前牙龈下残冠保存修复效果满意,牙周组织健康、修复美观稳定,但需严格掌握适应证。

Clinical aesthetic effectiveness of restoring the subgingival residual crowns of anterior teeth with crown lengthening surgery

PURPOSE: To evaluate the clinical effects of restoring the subgingival residual crowns of anterior teeth with periodontal and prosthodontics treatment. METHODS: Twenty-five patients with 28 subgingival residual crowns were treated by root canal therapy, crown lengthening surgery, and restored with post- core crown after 8 weeks. Changes in tooth mobility, gingival health were examined and clinical effect of crown restoration were evaluated at regular intervals of 1 month, 6 months and 12 months after restoration respectively. RESULTS: One year after restoration,the gingival health was improved and the overall effective rate was 89.28%. Three teeth were failed, one was due to mild tooth loose,and the other two were due to exposure of crown margin. CONCLUSIONS: For subgingival residual crowns of anterior teeth, crown lengthening surgery can conserve the biological width, and produce enough height of ferrule. Restoration can obtain satisfactory effects, but the indication must be selected properly.