下颌中切牙唇倾度与牙槽骨厚度关系的锥形束CT分析

上海口腔医学 ›› 2015, Vol. 24 ›› Issue (2): 210-214.

下颌中切牙唇倾度与牙槽骨厚度关系的锥形束CT分析

田玉楼,赵震锦,韩坤,吕品,曹宇鸣,孙红静,于默,岳杨

中国医科大学口腔医学院正畸科, 辽宁省口腔医学研究所正畸研究室,辽宁沈阳 110002

收稿日期:2014-06-16 出版日期:2015-04-20 发布日期:2015-07-24
通讯作者: 田玉楼,E-mail:tianyulou@sina.com
作者简介:田玉楼（1969-）,女,博士,教授
基金资助:
沈阳市科技计划项目（F14-231-1-47）

The relationship between labial-lingual inclination and the thickness of the alveolar bone in the mandibular central incisors assessed with cone-beam computed tomography

TIAN Yu-lou,ZHAO Zhen-jin,HAN Kun,LV Pin,CAO Yu-ming,SUN Hong-jing,YU Mo,YUE Yang

Department of Orthodontics, School of Stomatology, China Medical University, Liaoning Institute of Dental Research. Shenyang 110002, Liaoning Province, China

Received:2014-06-16 Online:2015-04-20 Published:2015-07-24
Supported by:
Science and Technology Projects of Shenyang City (F14-231-1-47)

摘要/Abstract

摘要： 目的应用锥形束CT（CBCT）测量分析下颌中切牙不同唇倾度与牙槽骨厚度的关系。方法选择60例患者的头颅侧位片和CBCT影像资料,按照下颌中切牙-下颌平面角（L1-MP）分为3组,即舌倾组L1-MP<85.6°;正常组L1-MP为85.6°~99.6°;唇倾组L1-MP>99.6°。三维重建CBCT,在矢状面图像上沿下颌中切牙长轴,选择牙槽骨截面最大的图像,将牙根从釉牙骨质界到根尖点平均分为4段,测量唇、舌侧牙槽骨厚度并合计得到总厚度,观察计数骨开窗及骨开裂发生情况。采用SPSS17.0软件包对数据进行统计学分析。结果舌侧及总牙槽骨厚度在各测量位点间的差异均有统计学意义。根中1/2、根尖1/4及根尖处牙槽骨厚度唇侧均小于舌侧。舌侧牙槽骨厚度在各测量位点均为舌倾组小于唇倾组, 牙槽骨总厚度在根尖、根尖1/4、根中1/2处舌倾组比唇倾组薄。唇倾组和舌倾组的骨开裂发生率均高于正常组,差异显著(P<0.05)。结论下颌中切牙舌侧及总牙槽骨厚度从根尖区到根颈区逐渐变小,舌倾组舌侧及牙槽骨总厚度比唇倾组薄,下颌中切牙牙轴过度唇倾或舌倾易发生骨开裂。

关键词: 牙槽骨厚度, 下颌中切牙, 下颌中切牙-下颌平面角, 锥形束CT

Abstract: PURPOSE: To investigate the alveolar bone thickness of mandibular central incisors with different labial-lingual inclinations by cone-beam computed tomography (CBCT). METHODS: CBCT and lateral cephalometric images of 60 patients were chosen. The data was respectively classified into 3 groups by L1-MP: lingual inclination group (L1-MP<85.6°); normal group (L1-MP 85.6°-99.6°), and labial inclination group(L1-MP>99.6°). Three-dimensional reconstruction was made for CBCT, and the sagittal images of the largest alveolar bone area along the tooth axis were chosen. The central incisor roots were divided into 4 sections from cementoenamel junction to root apex, then the labial and lingual alveolar bone thickness were measured and added up to get total alveolar bone thickness, and the occurrence of fenestration and dehiscence were recorded. The data was analyzed with SPSS 17.0 software package. RESULTS: The alveolar bone thickness on lingual side and the total bone thickness were significantly different between every 2 sections of all the measured zone. The average values of bone thickness on labial side were thinner than that on lingual side in sections of middle 1/2, root apex 1/4 and root apex. The total bone and lingual bone were thinner in lingual inclination group than in labial inclination group at root apex, root apex 1/4 and middle 1/2. Labial and lingual inclination group were more likely to develop dehiscence (P<0.05). CONCLUSIONS: Lingual and total alveolar bone of central incisors become increasingly thinner from root apex area to cementoenamel junction. The total bone and lingual bone are thinner in lingual inclination group than in labial inclination group. Labial or lingual inclined incisors have higher incidence of dehiscence.

Key words: Alveolar bone thickness, Mandibular central incisor, L1-MP angle, Cone-beam CT

中图分类号:

R782.1

田玉楼,赵震锦,韩坤,吕品,曹宇鸣,孙红静,于默,岳杨. 下颌中切牙唇倾度与牙槽骨厚度关系的锥形束CT分析[J]. 上海口腔医学, 2015, 24(2): 210-214.

TIAN Yu-lou,ZHAO Zhen-jin,HAN Kun,LV Pin,CAO Yu-ming,SUN Hong-jing,YU Mo,YUE Yang. The relationship between labial-lingual inclination and the thickness of the alveolar bone in the mandibular central incisors assessed with cone-beam computed tomography[J]. Shanghai Journal of Stomatology, 2015, 24(2): 210-214.

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