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2
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Tomographic evaluation of infrazygomatic crest for orthodontic anchorage in different vertical and sagittal skeletal patterns.不同垂直和矢状骨面型中用于正畸支抗的颧下嵴的断层扫描评估
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[Study of three-dimensional anatomical relationship between infrazygomatic crest and maxillary sinus for mini-screw insertion].[用于微型螺钉植入的颧下嵴与上颌窦三维解剖关系的研究]
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Three-Dimensional Evaluation on the Effect of Maxillary Dentition Distalization With Miniscrews Implanted in the Infrazygomatic Crest.颧牙槽嵴内植入微螺钉远移上颌牙列的三维效果评价
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Safe zones for miniscrews in maxillary dentition distalization assessed with cone-beam computed tomography.使用锥形束计算机断层扫描评估上颌牙列远中移动时微型螺钉的安全区
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Finite element analysis of miniscrew placement in mandibular alveolar bone with varied angulations.不同角度下颌牙槽骨微螺钉植入的有限元分析
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颧下嵴处正畸微型种植体植入的最佳部位和角度：一项基于锥形束计算机断层扫描（CBCT）的研究

Optimal sites and angles for the insertion of orthodontic mini-implants at infrazygomatic crest: a cone beam computed tomography (CBCT)-based study.

作者信息

Song Qinxuan, Jiang Fan, Zhou Maolin, Li Tianle, Zhang Shizhen, Liu Lu, Pu Lingling, Lai Wenli, Long Hu

机构信息

State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University Chengdu 610041, Sichuan, China.

Faculty of Dentistry, University of Hong Kong, Prince Philip Dental Hospital HKSAR, China.

出版信息

Am J Transl Res. 2022 Dec 15;14(12):8893-8902. eCollection 2022.

PMID:36628253
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9827336/
Abstract

BACKGROUND AND OBJECTIVES

Both cortical and overall bone thicknesses of the infrazygomatic crest (IZC) were measured to determine the optimal areas for mini-implants into the IZC. The impact of insertion sites, heights and angles, sex and age on bone thickness were evaluated.

MATERIALS AND METHODS

In this study, cone beam computed tomography (CBCT) images of 32 patients were included. The cortical bone thickness (CBT) and overall bone thicknesses (OBT) of IZC were measured at different insertion sites between the maxillary first and second molars (site 61, 62, 63, 67, 71, 72 and 73), different heights (0 to 12 mm from alveolar bone crest) and different angles (0 to 90 degrees from the reference line).

RESULTS

OBT was the thickest at site 63, followed by site 73. For each site, the insertion height where OBT was the thickest decreased with the increase of angle CBT and OBT were significantly influenced by sex and age. The percentage of root contact was significantly influenced by insertion heights and angles, not by sites. The recommended regions in the IZC for mini-implants were mapped.

CONCLUSIONS

Both CBT and OBT in the infrazygomatic crest were influenced by insertion sites, heights, and angles. Sex and age had an impact on CBT and OBT. The optimal insertion heights and angles were 12 mm to 18 mm from the occlusal plane, and 40 to 70 degrees for mini-implants at IZC.

摘要

背景与目的

测量颧骨下缘（IZC）的皮质骨厚度和整体骨厚度，以确定微型种植体植入IZC的最佳区域。评估植入部位、高度、角度、性别和年龄对骨厚度的影响。

材料与方法

本研究纳入了32例患者的锥形束计算机断层扫描（CBCT）图像。在第一和第二上颌磨牙之间的不同植入部位（位点61、62、63、67、71、72和73）、不同高度（距牙槽嵴0至12毫米）和不同角度（与参考线成0至90度）测量IZC的皮质骨厚度（CBT）和整体骨厚度（OBT）。

结果

OBT在63位点最厚，其次是73位点。对于每个位点，OBT最厚时的植入高度随角度增加而降低。CBT和OBT受性别和年龄的显著影响。牙根接触百分比受植入高度和角度的显著影响，而不受位点影响。绘制了IZC中微型种植体的推荐区域。

结论

颧骨下缘的CBT和OBT均受植入部位、高度和角度的影响。性别和年龄对CBT和OBT有影响。IZC微型种植体的最佳植入高度和角度分别为距咬合平面12毫米至18毫米以及40至70度。