成人安氏Ⅱ类错牙合患者上切牙唇侧牙槽骨厚度的锥形束CT研究
首发时间：2018-04-27
摘要： 目的 通过锥形束CT（CBCT）研究成人安氏Ⅱ类错牙合患者上切牙不同位点的唇侧牙槽骨厚度,为正畸治疗中牙齿移动范围及移动方向的控制提供理论依据。方法 选取100例成人安氏Ⅱ类错牙合患者，分为两组：安氏Ⅱ类1分类错牙合组50例，安氏Ⅱ类2分类错牙合组50例；以个别正常牙合志愿者50例作为对照组，所有对象拍摄治疗前CBCT片，然后将所获得的CBCT影像数据导入InvivoDental 5.0图像处理软件进行三维重建，在牙体长轴矢状面上对上切牙唇侧牙槽骨厚度进行测量，然后计算唇侧牙槽骨厚度占总牙槽骨厚度的百分比。结果 三组上颌切牙左右侧对称牙位的唇侧牙槽骨厚度及占总牙槽骨厚度的百分比无统计学差异（p>0.05）；上颌中切牙牙槽骨厚度大于侧切牙，差异具有统计学意义（p<0.05），沿着牙体长轴方向（从颈部至根尖方向），根尖部唇侧牙槽骨厚度最大，根中部和根颈部较小；不同位点的唇侧牙槽骨厚度，个别正常牙合 组最大，安氏Ⅱ类1分类组次之，安氏Ⅱ类2分类组最小，其中在根尖部位安氏Ⅱ类1分类组最大，个别正常牙合 组次之，安氏Ⅱ类2分类组最小。结论 上切牙唇侧牙槽骨厚度与错牙合 的类型有关，除中切牙根尖区外，其它部位唇侧牙槽骨厚度均小于2mm,唇侧牙槽骨厚度占相应部位总牙槽骨厚度的百分比不足20%。
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Study of labial alveolar bone thickness of adult patients with Angle Class II malocclusion in upper incisors with cone- beam CT
Abstract：IObjective To measure the labial alveolar bone thickness of adult patients with Angle Class II malocclusion in upper incisors with CBCT, in order to provide references for clinical treatment. Methods 100 adult patients with Angle ClassⅡmalocclusion were divided into two groups: 50 cases in the division 1 malocclusion group and 50 cases in the division 2 malocclusion group; with 50 normal occlusion volunteers were used as the control group.CBCT images were taken before orthodontic treatment,and then imported the acquired CBCT image data into the InvivoDental 5.0 image processing software for 3D reconstruction, measuring the thickness of the alveolar bone on the maxillary labial side on the sagittal plane of the tooth body,and then calculating the percentage of labial alveolar bone thickness to the total alveolar bone thickness. Results The labial alveolar bone thickness and the percentage of labial alveolar bone thickness to the total alveolar bone thickness in left and right symmetrical teeth of maxillary incisors had no significant difference (p>0.05), among three groups; The alveolar bone thickness of maxillary central incisors was statistically greater than the lateral incisors (p<0.05); along the long axis of the tooth (from the neck to the apical direction),labial alveolar bone thickness was thinner in the middle and largest in the apex; the labial alveolar bone thickness and the percentage of labial alveolar bone to the total alveolar bone thickness in different anatomic sites of tooth root in the upper incisors had difference among three groups. Conclusion The labial alveolar bone thickness in upper incisors was related to the type of malocclusion.The labial alveolar bone thickness was less than 2 mm except in the apical area of central incisor. The percentage of alveolar bone thickness to total alveolar bone thickness was less than 20%.
Keywords： adult Class Ⅱ malocclusion upper incisors alveolar bone thickness CBCT
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成人安氏Ⅱ类错牙合患者上切牙唇侧牙槽骨厚度的锥形束CT研究
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