27例后牙区多生牙的临床分析

摘要

AIM:To investigate the clinical features of supernumerary teeth in the posterior tooth area. METHODS:A retrospective analysis was conducted based on the data of 41 supernumerary teeth in the posterior tooth area in 27 cases. RESULTS:Among the 27 patients,there were 15 males(55.56%)and 12 females(44.44%). There were 17 patients (62.96%)with 1 supernumerary tooth,8(29.63%)with 2,1(3.70%)with 3 and 1 with 5 supernumerary teeth. Of the 41 teeth,20(48.78%)were maxillary,21(51.22%)were mandibular,16(39.02%) were at buccal side,25 (60. 98%)at palatal,23 (56. 10%)at premolar area,7 (17. 07%)at molar area,11 (26.83%)at distal maxillary third molar area. CONCLUSION:Supernumerary in posterior tooth region are mostly at mandibular premolar area followed by those at distal maxillary third molar area.%目的:探讨后牙区多生牙的临床特点.方法:从数目、发生区域、空间位置等对27例患者41个后牙区多生牙的病例资料进行回顾性分析.结果:27例多生牙患者中,男性(15例,55.56%)多于女性(12例,44.44%);多生牙数为1个17例(62.96%),2个8例(29.63%),3、5个各为1例(3.70%).27例患者共41个多生牙中,上颌20个(48.78%),其中颊、腭侧分别为11个(26.83%)、9个(21.95%)(P＜0.05);下颌21个(51.22%),其中颊、舌侧分别为5个(12.20%)、16个(39.02%)(P＜0.05);前磨牙区23个(56.10%),磨牙区7个(17.07%),上颌第三磨牙远中区11个(26.83%),各多生牙区域的上、下颌相比均有统计学差异(P＜0.05).结论:后牙区多生牙以下颌前磨牙区发生率最高,其次是上颌第三磨牙远中.