下颌第一前磨牙C形牙根根管横断面形态及壁厚的锥体束CT分析  

Cross-sectional morphology and wall thickness of the root canal system in mandibular first premolars with Cshaped root evaluated by cone-beam CT

作　　者：李骏[1] 李玲[2] 

机构地区：[1]温州医学院附属口腔医院牙体牙髓病科,浙江温州325027 [2]温州医学院附属口腔医院儿童口腔科,浙江温州325027

出　　处：《上海口腔医学》2012年第5期531-534,共4页Shanghai Journal of Stomatology

摘　　要：目的：分析下颌第一前磨牙C形牙根的根管横断面形态,并对最小根管壁厚度进行测量。方法：选取44颗具有C形牙根的下颌第一前磨牙,使用锥体束CT（cone-beam computed tomography,CBCT）进行扫描,并三维重建。分析根颈1/3、根中1/3和根尖1/3段的根管横断面形态分布变化,并对牙根各段的根面沟侧及对侧最小根管壁厚度进行测量比较。采用SPSS13.0软件包对数据进行统计学分析。结果：根中1/3、根尖1/3的根管横断面形态分布较为复杂,以C2~C4型为主,与根颈1/3存在显著差异（P〈0.05）;根中1/3和根尖1/3根面沟侧的最小根管壁厚度小于对侧（P〈0.05）,且最小根管壁厚度均〈1 mm。结论：下颌第一前磨牙C形牙根的中下段根管形态复杂,且根面沟侧的根管壁较薄,临床治疗中应考虑到以上解剖特点。PURPOSE： To analyze the cross-sectional morphology of the root canal system in mandibular first premolars with C-shaped root and measure the minimum canal wall thickness.METHODS： 44 mandibular first premolars with Cshaped root were selected.The specimens were scanned by cone-beam computed tomography and 3D images of each specimen were reconstructed.The distribution of cross-sectional morphology of root canals in different portion of the roots was analyzed and compared.And measurement of the minimum canal wall thickness in the radicular groove aspect and the opposite aspect in different portion of the roots was taken.SPSS13.0 software package was used to perform the statistical analysis.RESULTS： The distribution of cross-sectional morphology of root canals was complex in the middle 1/3 and apical 1/3,mainly in types C2,C3 and C4,which was different from that of cervical 1/3（P0.05）.The minimum canal wall thickness in the radicular groove aspect was thinner than that in the opposite aspect of both middle 1/3 and apical 1/3（P 0.05）.And the value of the minimum canal wall thickness in both middle 1/3 and apical 1/3 was less than 1mm. CONCLUSIONS： Morphology of root canals in mandibular first premolars with C-shaped root was complex in apical 2/3 of the roots and the canal wall thickness was thinner in the radicular groove aspect.These factors should be considered in clinical treatment.

关 键 词：下颌第一前磨牙 C形牙根 根面沟 横断面形态 最小根管壁厚度 锥体束CT 

分 类 号：R816.98[医药卫生—放射医学]