广西地区693颗壮族人恒牙解剖形态测量

Permanent teeth morphology of Zhuang Nationality in Guangxi Autonomous Region

目的了解我国壮族人群恒牙的牙体形态特征,为其牙体牙髓疾病的临床诊治提供牙体解剖形态数据。方法收集广西壮族地区新鲜拔除的693颗恒牙,用数显游标卡尺测量各牙位牙齿的形态学数据,采用SPSS12.0统计学软件进行统计分析。结果壮族人群尖牙牙体全长最长(25.36±2.49)mm,下颌第三磨牙最短(17.84±1.50)mm。中切牙冠根比为0.90±0.15。上颌第三磨牙变异较大。下颌第一磨牙根分叉距离较短(8.61±0.82)mm。下颌第二磨牙牙根颊侧融合发生率为12.5%。结论获得壮族人群牙体解剖形态具体数据,与汉族人群存在一定差异。

Objective To investigate the morphology of permanent teeth of Zhuang nationality in Guangxi Autonomous Region and to provide anatomic data for clinical treatment of tooth and pulp diseases.Methods A total of 693 freshly extracted permanent human teeth of Zhuang nationality were collected. The morphological data of these teeth were measured according to the established method. The data were analyzed by SPSS12.0 software.Results The full length of canine （25.36±2.49）mm was the longest in the examined Zhuang nationality permanent tooth,while the mandibular third molar （17.84±1.50）mm was the shortest. The crown root ratio of central incisor was （0.90±0.15）. And the maxillary third molar had high rate variation; the root furcation length （8.61±0.82）mm of the mandibular first molar was the shortest; and the fusion ratio of the root buccal side of the mandibular second molars was 12.5%.Conclusion The morphological data of Zhuang nationality＇s permanent teeth was obtained and they slightly differ from Han nationality＇s data reported.