2000年前人牙内陷畸形上颌侧切牙根管形态的显微CT研究  

Micro-CT analysis of the root canal anatomy in maxillar ylateral incisors with dens invaginatus in ancient Chinese of 2000 years ago

作　　者：石飒飒[1] 邵金陵[1] 段小红[1] 段清波 彭绍斌[1] 

机构地区：[1]第四军医大学口腔医学院,陕西西安710032 [2]陕西省考古研究院,陕西西安710054

出　　处：《牙体牙髓牙周病学杂志》2013年第4期240-243,共4页Chinese Journal of Conservative Dentistry

基　　金：国家自然科学基金资助项目(31070835);陕西省社发攻关课题基金资助项目(2009K17-03)

摘　　要：目的:测量记录2000年前人牙内陷上颌侧切牙根管长度和直径,计算根管锥度,并与正常上颌侧切牙比较。方法:选取牙内陷上颌侧切牙21个(畸形组)和正常上颌侧切牙12个(正常组)。用Micro-CT进行扫描,Mimics软件重建,测量根管长度和不同部位根管直径,计算根管锥度;进行统计分析。结果:两组间根管长度的比较差异无统计学意义(P>0.05);根管直径的比较:两组间颊舌向根中1/3处、颊舌向和近远中向根尖孔处间的差异均有统计学意义(P<0.05)。根管锥度的比较:畸形组颊舌向各段间的差异均无统计学意义(P>0.05);近远中向尖段与冠段、中段间差异均有统计学意义(P<0.05);正常组颊舌向和近中远中向各段间差异均有统计学意义(P<0.05),两组间各段根管锥度间差异均无统计学意义(P>0.05)。结论:2000年前人牙内陷上颌侧切牙与正常上颌侧切牙间根管形态有差异,牙内陷可引起牙根管形态的变化。AIM： To investigate the root canal anatomy of normal maxillary lateral incisors and maxillary lateral incisors with dens invaginatus of ancient Chinese individuals of 2,000 years ago. METHODS ： 12 normal per- manent maxillary lateral incisors and 21 abnormal ones with single-rooted-canal were scanned by Micron-CT and re- constructed respectively by Mimics 10.01. software. The canal length was measured. For each cross section of the ca- nals, bucco-lingual （BL） and mesion-distal （MD） diameters of each canal were measured at cervical, middle and apical 1/3 sections of the canals by software Mimics. The taper of the canals was calculated and analyzed. RESULTS ： Difference was not found between the canal lengths of the two groups （P 〉 0.05）. There were differences in canal BL diameter at the middle, MD and BL diameters at the apical foramens betwent the two groups （P 〈 0.05）. In dens in- vagination group, there was no taper difference among the three sections in BL direction, there was difference between apical and cervical sections （P 〈 0.05 ）, as well as between the apical and middle sections （ P 〈 0.05 ）. In normal

关 键 词：考古学 Micro—CT 上颌侧切牙 牙内陷 根管 

分 类 号：R781[医药卫生—口腔医学]