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目的探讨改良牙冠延长术的临床疗效。方法回顾性分析2013年6月至2015年4月中国医科大学附属盛京医院辽东湾分院收治的11例(14颗牙)接受改良牙冠延长术患者的临床资料。结果 14颗牙术后随访1~3年,平均(26±10)个月;1例患者(1颗牙)对磨牙金属修复体颜色不满意,其功能和美观疼痛视觉模拟量表(VAS)评分为8.4分、8.6分,余13颗牙的功能和美观VAS评分分别为9.5±0.4(9.0~10.0)分、9.6±0.3(9.1~10.0)分;1颗术牙因修复体悬突而导致牙龈红肿,余牙牙周情况良好;2颗术牙出现了轻微松动;术牙3个位点(3.6%)牙周探诊深度为4 mm,余81个位点(96.4%)探诊深度均≤3 mm;66个位点(78.6%)有不同程度的出血;14颗术牙中修复体牙冠缘58个位点(69.0%)位于冠缘龈上0.5至龈下1.0 mm,26个位点(31.0%)位于龈下1.5~3.0 mm。结论改良牙冠延长术是一种疗效较好的保留残根、残冠的牙周手术。
Objective To explore the clinical effect of modified crown extension surgery. Methods The clinical data of 11 patients (14 teeth) receiving modified crown extension from Liaodong Bay Branch of Shengjing Hospital Affiliated to China Medical University from June 2013 to April 2015 were retrospectively analyzed. Results One patient (1 tooth) was dissatisfied with the color of molars metal prosthesis. The function and aesthetic pain visual analogue scale (VAS) of 14 patients were followed up for 1 to 3 years (mean, 26 ± 10) months. The score of VAS score was 8.4 ± 0.4 (9.0-10.0) and 9.6 ± 0.3 (9.1-10.0) respectively, with the score of 8.4 and 8.6. The function and aesthetic VAS scores of the remaining 13 teeth were significantly higher than those of the control group Which resulted in the swelling of the gums and periodontal conditions. The two teeth showed a slight loosening. The 3 probing sites (3.6%) had a periodontal exploration depth of 4 mm and more than 81 sites (96.4%) probed The depth was ≤3 mm; 66 sites (78.6%) had different degree of hemorrhage; 58 of the 14 teeth (69.0%) were located on the margin of the coronal margin 0.5 mm to the subgingival margin 1.0 mm, 26 sites (31.0%) were located subgingival 1.5-3.0 mm. Conclusion Modified crown extension is a periodontal surgery with good effect of retaining residual roots and residual crowns.