4674颗下颌前牙根管构型的锥形束CT分析

发布时间：2018-11-13 07:26

【摘要】：目的:通过锥形束CT(cone beam CT,CBCT)研究下颌前牙的根管构型,为临床根管治疗提供参考依据。方法:选取北京大学口腔医学院自2012年10月至2013年7月进行CBCT检查的866名患者的影像资料,由牙髓专业医生和放射专业医生共同筛取未进行根管治疗和牙根发育完整的下颌前牙4 674颗。根据牙位和年龄分组,观察牙根、根管数目和根管构型,并进行分析。结果:下颌中切牙和侧切牙均为单根,0.7%(11/1 542)的尖牙为双根。中切牙、侧切牙与尖牙的双根管率分别为6.7%(105/1 566),17.4%(273/1 566)和3.0%(46/1 542)。下颌前牙为双根管的患者中,双根管对称发生的比例为中切牙58.7%(37/63),侧切牙76.1%(108/142),尖牙29.6%(8/27)。各年龄组下颌中切牙、侧切牙和尖牙双根管率最高的分别为31~40岁年龄组(9.8%,28/287),31~40岁年龄组(21.5%,61/284),51岁(含51岁)以上年龄组(9.2%,19/207)。下颌前牙双根管构型多为TypeⅢ。结论:下颌侧切牙双根管率、双根管对称发生率最高,下颌前牙双根管构型以TypeⅢ型为主。
[Abstract]:Objective: to study the root canal configuration of mandibular anterior teeth by conical bundle CT (cone beam CT,CBCT, and to provide reference for clinical root canal therapy. Methods: the imaging data of 866 patients with CBCT from October 2012 to July 2013 in Peking University School of Stomatology were selected. 4,674 mandibular anterior teeth without root canal therapy and complete root development were sifted by pulp and radiologist. The root, root canal number and root canal configuration were observed and analyzed according to tooth position and age. Results: the mandibular central incisor and lateral incisor were both single root, and 0.7% (11 / 1,542) canine teeth were double roots. The double root canal rates of central incisor, lateral incisor and canine were 6.7% (105 / 1,566), 17.4% (273 / 1566) and 3.0% (46 / 1,542), respectively. Among the patients with double root canals, 58.7% (37 / 63) of central incisors, 76.1% (108 / 142) of lateral incisors and 29.6% (8 / 27) of canine teeth were symmetrical. The rate of double root canals of mandibular central incisor, lateral incisor and canine teeth were the highest in the age group of 31 to 40 (9.8 / 287), 31 to 40 (21. 5% / 284), 51 (including 51) and 9. 2% respectively. 19 / 207). The conformation of two root canals of mandibular anterior teeth was mostly Type 鈪，

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