本文旨在评估经引导组织再生术(guided tissue re-generation,GTR)治疗牙龈退缩后膜龈复合体的长期稳定性。 材料和方法 患者术前颊侧牙龈退缩Miller’s分级Ⅰ、Ⅱ级,牙龈退缩在3mm以上,经引导组织再生术治疗后6个月,牙龈退缩减少2mm以上,根面覆盖≥60％。符合以上条件的20个患者被纳入观察,其中男 This article aims to evaluate the long-term stability of the gingival complex after treatment of gingival recession with guided tissue re-generation (GTR). Materials and Methods Preoperative gingival recession in patients with Miller's grading Ⅰ, Ⅱ grade, gingival recession in 3mm above 6 months after guided tissue regeneration, gingival recession reduced by 2mm, root coverage ≥ 60%. Twenty patients meeting the above criteria were included in the observation, among them male