锥束CT对下颌第一磨牙远舌根发生率的研究  

Investigation of mandibular first molars with distolingual roots using cone-beam computed tomography

作　　者：费鸿优[1] 廖志清[2] 彭雪珍[3] 赖碧娟[1] 

机构地区：[1]深圳市儿童医院口腔正畸科,广东深圳518026 [2]深圳市儿童医院口腔科,广东深圳518026 [3]深圳市妇幼保健院口腔科,广东深圳518017

出　　处：《临床口腔医学杂志》2012年第11期654-656,共3页Journal of Clinical Stomatology

摘　　要：目的:利用锥束CT三维影像调查分析下颌第一磨牙远舌根的形态及发生率,以提高根管治疗质量。方法:至少具有一侧下颌第一磨牙的469例患者927颗下颌第一磨牙被纳入研究,采用锥束CT扫描获得患者的影像资料,利用NNT version 3.0软件三维影像重建,分析下颌第一磨牙远舌根的牙根形态及发生率。结果:119例共206颗下颌第一磨牙具有远舌根,远舌根在人群中的发生率为25.4%(男性65例,占27.2%;女性54例,占23.5%),远舌根在所有牙齿中的发生率为22.2%(206颗/927颗)。绝大多数病例双侧同时具有远舌根(87例,占18.6%),远舌根单侧出现32例(右侧27例,占5.8%;左侧5例,占1.1%),远舌根在不同性别(P=0.678),左右侧(P=0.870)之间的发生率没有显著性差异。结论:中国人下颌第一磨牙远舌根的发生率比较高,其形态复杂,在临床治疗中应仔细探查远舌根管是否存在,从而提高根管治疗的成功率。Objective： To investigate mandibular first molars with distolingual roots using cone-beam computed tomography （CBCT）. Method： A total of 469 patients possessing at least one mandibular first molar were selected, the incidence of distolingual roots was recorded and analysised. Result： 119 patients （65 males and 54 females） were found to have mandibular first molars with distolingual roots, the overall incidence of patients with distolingual roots was 25.4 %, while 27.2 % for men and 24.3 % for women.Most patients with distolingual roots had them bilaterally （18.6 %）, there was neither a significant difference according to sex （P =0.678） nor the side of occurrence （ right side vs left side, P =0.870）. Conclusion： The incidence of distolingual roots among Chinese population was 25.4 % and the incidence of distolingual roots from all teeth examined was 22.2 %, Dentists should take into account the prevalence of these distolingual roots during root canal therapy.

关 键 词：下颌第一磨牙 远舌根 锥束CT 牙根形态 

分 类 号：R816.98[医药卫生—放射医学] R322.4[医药卫生—临床医学]