利用锥形束CT对下颌磨牙根分叉病变区骨嵴形态的观察

发布时间：2018-06-04 22:40

本文选题：根分叉部缺损 + 下颌磨牙　；参考：《北京大学学报(医学版)》2017年01期

【摘要】：目的:利用锥形束计算机体层摄影术(cone beam computed tomography,CBCT)观察下颌磨牙Ⅱ度和Ⅲ度根分叉病变区(furcation involvement,FI)近远中向的骨嵴形态和骨袋分布情况,并提出对骨嵴形态的分类方法。方法:在既存的CBCT资料中,选取存在根分叉区水平向骨缺损的下颌磨牙进行观察,共纳入81颗下颌磨牙,共计117处Ⅱ度或Ⅲ度根分叉病变。依据邻面牙槽嵴顶连线与根分叉顶下方的牙槽嵴的位置关系,将根分叉区近、远中向的骨嵴形态分为凹陷型、水平型和凸出型,其中凹陷型又按照邻面牙槽嵴顶的连线与根分叉顶的位置关系,分为亚型1(牙槽嵴顶连线位于根分叉顶冠方或同一水平)与亚型2(牙槽嵴顶连线位于根分叉顶的根方),统计各类型出现的比例,在CBCT的矢状面图像中观察骨袋的分布情况。结果:在117处Ⅱ度和Ⅲ度FI中,水平型骨嵴形态出现的比例最高(64.10%),凸出型出现的比例最低(6.84%),凹陷型亚型1和亚型2出现的比例分别为13.68%和15.38%。有利于成骨的凹陷型亚型1的骨嵴形态,在Ⅱ度FI中出现的比例为8.96%,在Ⅲ度FI中为20.00%;117处病损中,有31处合并骨下袋,其中29处骨下袋位于牙齿邻面,其余2处位于根分叉区,骨下袋出现的频率在凹陷型亚型1中最高。结论:利用CBCT观察下颌磨牙根分叉区近、远中向的骨嵴形态并进行分类,有利于制定正确的治疗方案,也可用于分析骨嵴形态与再生性治疗成骨效果间的关系。
[Abstract]:Objective: using cone beam computed tomography (CBCT) to observe the shape of bone ridge and the distribution of bone bag in the proximal and distal part of mandibular molar (furcation involvement, FI), and put forward the classification method of bone ridge form. Method: in the existing CBCT data, the existence of the existence of root points is selected. A total of 81 mandibular molars were incorporated into the mandibular molar with horizontal bone defect. A total of 117 or third degree root bifurcations were included in the mandibular molar. According to the relationship between the crest line of the alveolar ridge and the alveolar ridge below the root, the root bifurcation area was divided into concave, horizontal and convex. According to the relationship between the line of the crest of the alveolar ridge and the position of the root bifurcate top, it is divided into subtype 1 (the top of the alveolar ridge is located at the root and the same level) and the subtype 2 (the root of the alveolar ridge is located at the root of the root). The distribution of the bone bag is observed in the sagittal image of the CBCT. The results are as follows: in 117 The proportion of horizontal type bone ridge in FI was the highest (64.10%), the proportion of the convex type was the lowest (6.84%), the proportion of the subtype 1 and the subtype 2 were 13.68% and 15.38%., respectively, 13.68% and the 15.38%., which were favorable for the bone crest form of the subtype subtype of the bone formation, the proportion in the second degree FI was 8.96%, and in the third degree FI was 20%; 117. Among the lesions, there were 31 subbone subbags, of which 29 were located in the adjacent surface of the teeth, the other 2 were located in the root bifurcate area, and the frequency of the subbone bag appeared in the subtype 1. Conclusion: CBCT was used to observe the near and distal bone ridge morphology of the mandibular grind root and to classify the bone ridge in the far middle. The relationship between the morphology of bone crest and the effect of regenerative osteogenesis was analyzed.
【作者单位】：北京大学口腔医学院·口腔医院牙周科口腔数字化医疗技术和材料国家工程实验室口腔数字医学北京市重点实验室;北京大学国际医院口腔科;
【分类号】：R781.4

【相似文献】