Abstract:

Objective    To evaluate the clinical appearance and periodontal status of impacted maxillary central incisors that had been exposed and aligned after a closed-eruption orthodontic surgical technique. Methods    The subjects consisted of 18 patients who were treated in  Stomatology Hospital of Yantai from 2011 to 2015. Examinations were done after orthodontic treatment for the unilateral labially impacted maxillary central incisors 3 months after retention. The clinical and radiographic variables were compared by SPSS 17.0 software package. Results    The treated central incisors showed no significant difference in plaque and gingival indexes，width of attach gingival or pocket depth，whereas a small but statistically significant increase was found in the clinical crown lengths. The bone support was reduced in the treated incisors，whereas in 4 of the control central incisors，abnormal gingival contour was recorded. Conclusion    This study demonstrates that the overall esthetic and periodontal results can be achieved by treating impacted maxillary central incisors with a closed-eruption orthodontic surgical technique. However，a long term follow-up study on the esthetic outcome is recommended.

Key words: impacted teeth, orthodontics, periodontal status, esthetics

摘要：

目的    评价上颌唇侧阻生中切牙行外科开窗及正畸闭合式牵引术后的牙周及美观效果。方法    选择烟台市口腔医院2011—2015年18例单侧上颌唇侧阻生中切牙患者，行外科开窗及正畸闭合式牵引术，拆除矫治器后3个月，分别对阻生牙及对照中切牙进行牙周指数、临床指数及X线指数的测量评价，采用SPSS17.0软件对数据进行分析。结果    与对照牙相比，受试牙的牙龈指数、菌斑指数、附着龈宽度、牙周袋深度无明显差异；但受试牙的临床冠长度增加，远中面骨支持量降低，差异有统计学意义（P＜0.05）；对照牙中4例出现牙龈炎症（或）牙龈增生堆积现象。结论    上颌唇侧阻生中切牙经过外科开窗及正畸闭合式牵引治疗后，获得的美观及牙周状况结果令人满意，但远期效果尚须进行长期追踪和评价。

关键词: 阻生牙, 正畸, 牙周状况, 美观