摘要
目的探讨新疆地区汉族人双侧上颌第一前磨牙根管系统解剖形态,为临床根管治疗提供影像学依据。方法收集100例双侧上颌第一前磨牙的口腔锥形束CT（CBCT）扫描图像,分析其牙根数目、根管数目及形态、两根管口间的距离、多根牙根分叉和多根管分叉位置。结果上颌第一前磨牙单根发生率为37.5%,双根发生率为62.5%;双根管发现率为94.0%,其中Ⅳ型为66.5%,Ⅱ型为23.5%,Ⅲ型为2.0%,Ⅴ型为1.5%,Ⅵ型为0.5%,单根管即Ⅰ型发现率为5%,三根管（2-3）型发现率为1%;两根管口间距离集中在2～4 mm,其中距离1～2mm有19颗牙（10.38%）,～3 mm有96颗牙（52.46%）,～4 mm有64颗牙（34.97%）,～5 mm有4颗牙（2.19%）。上颌第一前磨牙多根牙根分叉以根中1/3处多见,而根管分叉位置多以根冠1/3处多见。上颌第一前磨牙单双牙根的发生率与性别有相关性（P=0.049）,男性双根发生率多于女性,而左、右两侧上颌第一前磨牙单双牙根发生率差异无统计学意义（P〉0.05）。结论上颌第一前磨牙根管系统解剖形态复杂,CBCT可为根管系统提供准确的依据。
Objective To anatomically analyze the canal morphology of bilateral maxillary first premolar in Xinjiang han population using cone-beam computed tomography（CBCT）.Methods A total of 200 CBCT images of maxillary first premolars were obtained from 100 patients.Root number,tooth position,root canal morphology and the distance between the 2root canal orifices of maxillary first premolars with 2root canals were investigated.The the root canal types were classified according to Vertucci′s type.ResultsThere were 75（37.5%）teeth with one root,125（62.5%）teeth with two roots.The percentage of one canal,two canals and three canals（type 2-3）were 5%,94% and 1%,respectively.The distance between the 2root canal orifices of mandibular first premolars with 2root canals was approximately 2-4 mm.there were 19（10.38%）teeth between 1to 2 mm,96（52.46%）teeth between 2to 3 mm,64（34.97%）teeth between 3to 4 mm,4（2.19%）teeth between 4to 5mm.Bifurcation position of complicated maxillary first premolar root was found frequently in middle third.Conclusion CBCT can provide accurate information for canal system whose first premolar is complex.
出处
《新疆医科大学学报》
CAS
2016年第5期627-630,共4页
Journal of Xinjiang Medical University
基金
新疆维吾尔自治区自然科学基金(2013211A082)
关键词
上颌第一前磨牙
根管形态
锥形束CT
新疆地区汉族人
Maxillary first premolar
the canal morphology
Cone-beam computed tomography
Xinjiang han population
