显微CT下下颌骨松质骨结构的解剖学评价

发布时间：2018-02-21 00:23

本文关键词： 显微CT 下颌骨骨结构松质骨测量　出处：《广东医学》2017年S2期 　论文类型：期刊论文

【摘要】：目的应用显微CT分析下颌骨松质骨结构与咀嚼功能的关系。方法选取10具离体下颌骨的同侧磨牙区及前磨牙区,以金刚锯分离标本共20个,应用显微CT(skyscan 1072)扫描下颌骨前磨牙区及磨牙区样本,测量磨牙区及前磨牙区牙槽骨和基骨的松质骨微细结构,并对比各参数间的关系。结果与基底部的松质骨相比,牙槽骨有较高的骨容积率、骨小梁数目及较小的骨小梁间距(P0.05),即牙槽骨内的松质骨量多而紧密。基底部骨松质中,下颌管上部分较下颌管下部分有较高的骨容积率和骨小梁数目(P0.05),而骨小梁间距及各向异性程度低,下颌管上部分骨质较为致密。前磨牙区与磨牙区相比较,磨牙区牙槽骨具有较高的骨容积率及骨小梁数目,较小的骨小梁间距、结构模型指数及更低的各向异性程度(P0.05),磨牙区骨小梁多呈板状结构,作为抵抗外力的重建区。结论下颌骨的结构特点使其可承受咬合力以及行使咀嚼功能,在生物力学分析中,这些特点可供参考。
[Abstract]:Objective to analyze the relationship between mandibular cancellous bone structure and masticatory function by microCT. The microstructures of alveolar bone and abutment bone of mandibular premolars and molars were measured by CT(skyscan 1072 (microscopic CT(skyscan 1072). The results were compared with those of cancellous bone at the base of the mandible, and the microstructures of the alveolar bone and the abutment bone of the premolar region were compared with that of the cancellous bone at the base of the mandible. The alveolar bone has a high bone volume ratio, the number of trabeculae and the space between trabeculae and trabeculae are P0.05, which means that the cancellous bone in the alveolar bone is more and more compact, and in the cancellous material at the base of the bone, In the upper part of the mandibular canal, the bone volume rate and the number of trabeculae were higher than those in the lower part of the mandibular canal, while the trabecular spacing and anisotropy were lower, and the upper part of the mandibular canal was denser than that of the lower part of the mandibular canal. The premolar region was compared with the molar region. The alveolar bone in the molar region had higher bone volume rate and bone trabecular number, smaller trabecular spacing, model index and lower anisotropy (P 0.05), and the trabeculae in the molar region were mostly plate shaped. Conclusion the structural characteristics of mandible make it bear bite force and perform masticatory function. These characteristics can be used for reference in biomechanical analysis.
【作者单位】：滨州医学院口腔学院;北华大学口腔医学院;
【基金】：山东省自然科学基金重点项目(编号:z2006c01)
【分类号】：R782;R816.98

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