【摘要】：目的:通過錐形束CT(cone beam CT,CBCT)研究下頜前牙的根管構(gòu)型,為臨床根管治療提供參考依據(jù)。方法:選取北京大學(xué)口腔醫(yī)學(xué)院自2012年10月至2013年7月進(jìn)行CBCT檢查的866名患者的影像資料,由牙髓專業(yè)醫(yī)生和放射專業(yè)醫(yī)生共同篩取未進(jìn)行根管治療和牙根發(fā)育完整的下頜前牙4 674顆。根據(jù)牙位和年齡分組,觀察牙根、根管數(shù)目和根管構(gòu)型,并進(jìn)行分析。結(jié)果:下頜中切牙和側(cè)切牙均為單根,0.7%(11/1 542)的尖牙為雙根。中切牙、側(cè)切牙與尖牙的雙根管率分別為6.7%(105/1 566),17.4%(273/1 566)和3.0%(46/1 542)。下頜前牙為雙根管的患者中,雙根管對(duì)稱發(fā)生的比例為中切牙58.7%(37/63),側(cè)切牙76.1%(108/142),尖牙29.6%(8/27)。各年齡組下頜中切牙、側(cè)切牙和尖牙雙根管率最高的分別為31~40歲年齡組(9.8%,28/287),31~40歲年齡組(21.5%,61/284),51歲(含51歲)以上年齡組(9.2%,19/207)。下頜前牙雙根管構(gòu)型多為TypeⅢ。結(jié)論:下頜側(cè)切牙雙根管率、雙根管對(duì)稱發(fā)生率最高,下頜前牙雙根管構(gòu)型以TypeⅢ型為主。
[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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