曲面断层片和锥形束CT对上颌阻生尖牙的定位分析

发布时间：2018-01-02 22:15

本文关键词：曲面断层片和锥形束CT对上颌阻生尖牙的定位分析　出处：《口腔医学研究》2015年02期 　论文类型：期刊论文

【摘要】：目的:通过对曲面断层片中上颌阻生尖牙近远中向和垂直向的影像学分区,判定其与锥形束CT(conebeam computed tomography,CBCT)中相应尖牙唇腭侧位及相邻恒切牙根吸收之间的关系。方法:对68例患者的94颗上颌阻生尖牙进行曲面断层片的拍摄和CBCT扫描。将曲面断层片中上颌阻生尖牙近远中向牙尖所处的位置分为5区(Ⅰ区-Ⅴ区),将牙冠所处的垂直向高度分为3部分(牙冠段,根中段,根尖段),其唇腭侧位置和相邻恒切牙的根吸收情况则由CBCT判定。结果:曲面断层片中上颌阻生尖牙近远中向的区域定位与CBCT中相应阻生牙的唇腭侧位之间有显著相关(P0.001),唇侧阻生的尖牙常出现在曲面断层片中的Ⅰ、Ⅱ、Ⅲ区域,正中牙槽阻生的多在Ⅳ区域,腭侧阻生的常在Ⅴ区域,而垂直向的分段与之无显著相关。CBCT中相邻恒切牙的根吸收常发生在Ⅳ、Ⅴ区域和根中段、根尖段。曲面断层片中阻生尖牙近远中向和垂直向的区域划分均与CBCT中相邻恒切牙的根吸收之间有统计学意义(P0.05)结论:利用曲面断层片中上颌阻生尖牙近远中向的区域定位可以预测其唇腭侧位和相邻恒切牙的根吸收,垂直向的分段可用来判断相邻恒切牙的根吸收,而不可推测其唇腭侧阻生情况。
[Abstract]:Objective: through the panoramic radiographs of the maxillary impacted canine and vertical image to close schools to determine the partition, and cone beam CT (conebeam computed tomography, CBCT) in the canine labial palatal lateral and adjacent relationship between the absorption of permanent incisors. Methods: 94 of 68 patients with maxillary resistance the canines were shot and CBCT scanning panoramic radiographs. The panoramic radiographs of the impacted maxillary canine distal to the tip of the tooth position is divided into 5 districts (I - V District), the crown at the vertical height is divided into 3 parts (crown, root middle the root tip section), the palatal position and adjacent incisor root resorption by CBCT criteria. Results: panoramic radiographs of impacted maxillary canines were significantly correlated between palatal location and CBCT to the corresponding impacted teeth near the median (P0.001), labial impacted the fangs often appear in the Orthopantomograph In I, II, III region, middle alveolar impacted in Region IV, palatally impacted often in V region, and the vertical segment with no significant correlation in.CBCT adjacent incisor root resorption occurs frequently in the Middle Region IV, V and root, root segment. Orthopantomograph in the impacted canine distal to the regional division and vertical and CBCT between adjacent incisor root resorption was statistically significant (P0.05) conclusion: the resistance panoramicradiographs in maxillary cuspid to the location in the near and far can predict the palatal and adjacent incisor root resorption. The vertical segments can be used to determine the adjacent incisor root resorption, and can not speculate the palatal impacted.

【作者单位】：哈尔滨医科大学口腔医学院正畸科;
【基金】：黑龙江省博士后科研启动资金(LBH-Q11046)
【分类号】：R816.98
【正文快照】： 上颌尖牙是除第三磨牙之外最易发生阻生的牙齿,其中亚洲人多以唇侧阻生多见[1]。上颌尖牙的阻生可造成邻牙牙根吸收、牙齿的拥挤和错乱等,影响口腔功能和颜面部的美观。而早期的诊断和治疗,有利于牙颌系统的正常生长发育。因此对阻生牙的准确定位是目前临床研究的重点内容。全

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