Zhao Hong, Gu Xiao-Ming, Liu Hong-Chen, Wang Zhao-Wu, Xun Chun-Lei
Center of Stomatology, General Hospital of Chinese People's Armed Police Forces, Beijing, 100039, China.
Institute of Stomatology, Division of Clinical Surgery, Chinese PLA General Hospital, Beijing, 100853, China.
J Huazhong Univ Sci Technolog Med Sci. 2013 Apr;33(2):303-308. doi: 10.1007/s11596-013-1115-x. Epub 2013 Apr 17.
The purpose of this study was to investigate the cortical bone thickness of the inter-dental area of both jaws for orthodontic miniscrew placement. The cone-beam computerized tomography images of 32 non-orthodontic adults with normal occlusion were taken to measure the cortical bone thickness in both jaws. One-way analysis of variance (ANOVA) was used to analyze the differences in cortical bone thickness. Buccal cortical bone in the mandible was thicker than that in the maxilla. In the maxilla, cortical bone thickness was thicker in the buccal side than in the palatal side. Buccal cortical bone thickness in the mandible was thickest at the site distal to the first molar, and in the maxilla it was thickest at the site mesial to the first molar, while in the palatal side of maxilla it was thickest at the site mesial to the second premolar. The changing pattern of cortical bone thickness varies at different sites. In the buccal side of maxilla, the thinnest cortical bone thickness was found to be at 4 mm level from the alveolar crest, while the thickest was at 10 mm level (except for the site mesial to the first premolar). The buccal cortical bone thickness at the sites mesial or distal to the first molar in the mandible and palatal cortical bone thickness of maxilla tended to increase with increasing distance from the alveolar bone.
本研究的目的是调查上下颌牙间区域的皮质骨厚度，以便进行正畸微螺钉植入。对32名咬合正常的非正畸成年患者进行锥形束计算机断层扫描成像，以测量上下颌的皮质骨厚度。采用单因素方差分析（ANOVA）来分析皮质骨厚度的差异。下颌骨的颊侧皮质骨比上颌骨的厚。在上颌骨中，颊侧皮质骨厚度比腭侧厚。下颌骨的颊侧皮质骨厚度在第一磨牙远中部位最厚，上颌骨在第一磨牙近中部位最厚，而上颌骨腭侧在第二前磨牙近中部位最厚。皮质骨厚度的变化模式在不同部位有所不同。在上颌骨颊侧，距牙槽嵴4 mm处的皮质骨厚度最薄，而在10 mm处最厚（第一前磨牙近中部位除外）。下颌骨第一磨牙近中或远中部位的颊侧皮质骨厚度以及上颌骨的腭侧皮质骨厚度往往随着距牙槽骨距离的增加而增加。
