Objective: To observe the clinical efficacy of acellular dermal matrix combined with modified tunnel in the treatment of gingival recessions. Methods: 27 teeth with gingival recessions in 8 patients were treated by the means of acellular dermal matrix and modified tunnel technique and were followed up for 1 year. The clinical parameters of gingival recession depth,recession width,keratinized tissue height,probing depth and clinical attachment level were assessed. Percentage of root coverage(PRC),complete root coverage(CRC) and patient satisfactions were evaluated. Results: 1 years after treatment PRC reached to 76％,19 teeth got complete root coverage. Recession depth and recession width were significantly decreased(P ＜ 0. 05). Keratinized tissue height increased by(1. 25 ± 0. 24) mm. Clinical attachment level increased by(2. 75 ± 0. 59) mm. Conclusion: Acellular dermal matrix allograft combined with modified tunnel technique is effective in the treatment of gingival recessions.%目的: 观察脱细胞真皮基质膜结合改良隧道术治疗牙龈退缩临床疗效.方法: 应用脱细胞真皮基质膜结合隧道术治疗8例患者(共27个牙位) 的牙龈退缩,并进行12个月的随访观察.术前与术后12个月检查相关临床指标: 牙龈退缩深度、牙龈退缩宽度、角化龈高度、探诊深度及临床附着水平.评估根面缺陷覆盖率、完全根面覆盖率及患者满意度.结果: 治疗后1年根面缺陷覆盖率达76％,19颗牙获得完全根面覆盖.牙龈退缩深度、牙龈退缩宽度有显著降低(P ＜ 0. 05).角化龈高度增加(1. 25 ± 0. 24) mm.临床附着水平增加(2. 75 ± 0. 59) mm.结论: 脱细胞基质补片结合改良隧道术治疗牙龈退缩可以达到较好的临床效果.
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