锥形束CT在上颌前牙牙根形态观测中的应用

J4 ›› 2012, Vol. 38 ›› Issue (3): 575-579.

锥形束CT在上颌前牙牙根形态观测中的应用

李雪燕|张江山|章燕珍

浙江大学医学院附属第二医院口腔矫形科|浙江杭州 310009

收稿日期:2011-11-01 出版日期:2012-05-28 发布日期:2012-05-28
通讯作者: 章燕珍（Tel：0571-87784619，E-mail:zyz85@hotmail.com） E-mail:zyz85@hotmail.com
作者简介:李雪燕（1978-）|女|四川省营山县人|主治医师|医学硕士|主要从事口腔修复材料临床应用的研究。
基金资助:
浙江省自然科学基金资助课题（J20091495）
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Application of cone-beam CT in root morphology observation of human maxillary anterior teeth

LI Xue-yan,ZHANG Jiang-shan,ZHANG Yan-zhen

Department of Orthodontics,Second Affilicated Hospital,School of Medical Sciences,Zhejiang University,Hangzhou 310009,China

Received:2011-11-01 Online:2012-05-28 Published:2012-05-28

摘要/Abstract

摘要：

目的：利用锥形束CT（CBCT)测量上颌前牙牙根弯曲及牙根直径,为临床桩核设计提供依据。方法：对129颗上颌前牙进行CBCT扫描，采用多平面重建（MPR）获得牙体的三维重建图像，并进行定点、定线与定角测量，分析上颌前牙牙根的弯曲情况和牙根直径。结果：上颌中切牙在唇舌向的弯曲度小于上颌侧切牙和上颌尖牙2个牙位（χ²=6.592，P=0.037），但弯曲半径大于其他2个牙位（χ2=8.504，P=0.014）。上前牙在近远中向的3种弯曲长度分布构成比比较差异有统计学意义（χ2=13.910，P=0.008）。上前牙在唇舌向和近远中向的牙根直径比较差异有统计学意义（P=0.000）。结论：129颗上颌前牙牙根在CBCT上显示出不同的形态，不同牙位的牙根弯曲度、弯曲部位及牙根直径不同。
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关键词: 锥形束CT；上颌前牙；弯曲；直径；桩核

Abstract:

Objective To detect the root curvature and diameter in human maxillary anterior teeth by cone-beam computed tomography (CBCT) and to provide some anatomical parameters related to post-core design. Methods A total of 129 human maxillary anterior teeth were selected and analyzed.The three-dimensional images of these teeth were obtained by multiplanar reconstructions (MPR) technique of CBCT,and the root curvature and diameter were observed and measured by dedicated software. Results The mean labio-lingual root curvature degree of maxillary central incisors was significantly smaller than those of maxillary lateral incisors and canines (χ²=6.592，P=0.037),while the labio-lingual root curvature radius was significantly larger than those of other groups （χ²=8.504，P=0.014）. There were significant differences in the root length distribution of the mesio-distal curved part between the three different maxillary anterior teeth groups（χ²=13.910，P=0.008）. The mean diameter measured labiolingually was significantly different from that measured mesiodistally in various groups（P=0.000）. Conclusion There are differences in root morphology of 129 human maxillary anterior teeth,and the root curvatures and diameters of human maxillary anterior teeth present differently in CBCT.
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Key words: cone-beam CT； maxillary anterior teeth； curvature；diameter； , post-core

中图分类号:

李雪燕|张江山|章燕珍. 锥形束CT在上颌前牙牙根形态观测中的应用[J]. J4, 2012, 38(3): 575-579.

LI Xue-yan,ZHANG Jiang-shan,ZHANG Yan-zhen. Application of cone-beam CT in root morphology observation of human maxillary anterior teeth[J]. J4, 2012, 38(3): 575-579.