University of Mosul, College of Dentistry, Department of Pedodontics Orthodontics and Preventive Dentistry, Mosul, Iraq.
University of Mosul, College of Dentistry, Department of Pedodontics Orthodontics and Preventive Dentistry, Mosul, Iraq.
Int Orthod. 2020 Jun;18(2):246-257. doi: 10.1016/j.ortho.2020.02.001. Epub 2020 Mar 5.
This study was conducted to assess cortical bone thickness in the alveolar process of maxilla and mandible and to investigate its association with different orthodontic implant positions in Eastern Mediterranean young adults.
Computed tomography images of 50 patients aged between 18-35 years were included. Buccal, palatal and lingual cortical bone thicknesses were measured at 2, 4, 6, and 8mm from cemento-enamel junction starting from the mesial side of the second molar to the contralateral side. Pearson correlation was used to assess the association between cortical bone thickness and proposed orthodontic implant positions at all inter-radicular sites (p<0.05).
The highest value of buccal cortical bone thickness was found mesial to the second molar in the maxilla and mandible for both genders. The value of palatal cortical bone thickness was found to be at the highest rate mesial to canine and first premolar in males and females respectively. On the other hand, the highest value of lingual cortical bone thickness was recorded to be mesial to the first molar in both genders. In addition to that, the buccal cortical bone thickness was significantly higher than palatal at the area mesial to the second molar at all four levels from the cemento-enamel junction. A significant correlation was found between cortical bone thickness and 2, 4, 6, and 8mm orthodontic implant levels in all inter-radicular sites. The values of correlation coefficients ranged from 0.280 to 0.674 in the maxillary arch and from 0.266 to 0.605 in the mandibular arch.
From this study, we can conclude that as the position of the orthodontic implant moved more posteriorly and apically more cortical bone thickness was expected to be found in both jaws. A significant correlation was found between cortical bone thickness and the site of the orthodontic implant. Cortical bone thickness and its relationship with implant position should be taken into consideration when attempts are made to insert the orthodontic implant.
本研究旨在评估上颌和下颌牙槽嵴皮质骨厚度，并探讨其与东地中海年轻成年人不同正畸种植体位置的关系。
纳入 50 名年龄在 18-35 岁之间的患者的计算机断层扫描图像。从第二磨牙的近中侧到对侧，在釉牙骨质界 2、4、6 和 8mm 处测量颊侧、腭侧和舌侧皮质骨厚度。使用 Pearson 相关分析评估所有根间位点皮质骨厚度与拟议正畸种植体位置之间的关系（p<0.05）。
男女双侧上颌和下颌第二磨牙近中侧颊侧皮质骨厚度最高。男性和女性的腭侧皮质骨厚度最高值分别位于尖牙和第一前磨牙近中侧。另一方面，男女双侧第一磨牙近中侧的舌侧皮质骨厚度最高。此外，在釉牙骨质界四个水平的第二磨牙近中区域，颊侧皮质骨厚度明显高于腭侧。在所有根间位点，均发现皮质骨厚度与 2、4、6 和 8mm 正畸种植体水平之间存在显著相关性。相关系数的范围在上颌弓为 0.280 至 0.674，在下颌弓为 0.266 至 0.605。
从本研究可以得出结论，随着正畸种植体位置向后和向根尖移动，预计在上下颌骨中会发现更多的皮质骨厚度。皮质骨厚度与正畸种植体位置之间存在显著相关性。在尝试插入正畸种植体时，应考虑皮质骨厚度及其与种植体位置的关系。
