位点保存术在关闭拔牙间隙预防牙龈折痕的临床应用

Clinical Application of Alveolar Ridge Preservation Techniques in the Orthodontic Space Closure to Prevent Gingival Invagination

目的:研究位点保存术对正畸拔牙间隙关闭过程中出现牙龈折痕的影响,以评价该技术在临床应用的可行性。方法:选择对称性拔除双侧第一前磨牙的正畸病例3例,6对牙齿,采用自身左右对照。随机选取一侧进行位点保存,另一侧拔牙后进行常规处理,作为对照,术后6周开始正畸治疗。选用牙周探针进行测量,对比两组牙龈折痕的发生情况。结果:对照组上颌1例患者,下颌所有患者中均出现牙龈折痕,实验组观察到牙龈折痕的出现。结论:位点保存术能够对抗拔牙窝的萎缩,有效的预防牙龈折痕的发生。

Objective： To evaluate the feasibility of alveolar ridge preservation techniques and the etlects on gmglvai invagination during orthodontic space closure after tooth extraction. Methods： Three adult patients with 6 pairs of teeth were involved and first premolars were symmetrically extracted. One side was randomly selected to implant bio-oss hone material and cover bio-gide collagen membrane （experiment group）, while the other side underwent the conventional orthodontic process （control group）. After six--week treatment, the incidence of gingival invagination was evaluated using periodontal probe, respectively. Results： In the control group, gingival invagination occurred in the maxilla of one patient and mandible of all patients. However, there was no gingival invagination in the experimental group. Conclusion： Site preservation technique could effectively avoid the atrophy of tooth sockets and gingival invagination.