The three-dimensional microstructure of the trabecular bone in the mandible
The three-dimensional microstructure of the trabecular bone in the mandible
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DOI：
10.1007/s00276-004-0247-x
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发表时间：
2004-12-01
影响因子：
1.4
通讯作者：
Chung, MK
中科院分区：
文献类型：
--
作者：
Moon, HS;Won, YY;Chung, MK
本研究利用micro-CT对下颌骨牙槽骨和基骨的三维骨小梁显微结构进行了研究，并对不同部位的骨小梁形态计量学值进行了比较。制备10个标本，并使用微型CT系统进行扫描。测量下颌前磨牙区牙槽骨和基底骨小梁的结构分析。创建横截面1024 x1024像素图像。从生成的二维（213）图像中重建三维结构图像。扫描标本后，从三维重建图像中选择牙槽骨和基底骨区域的感兴趣体积（VOI），分析骨体积分数、骨表面密度、骨小梁厚度、骨小梁间距、骨小梁数量和结构模型指数等结构参数。骨小梁结构表现出显着的变化的网站内的标本，特别是在基础骨小梁下颌管下方。在牙槽骨和基底骨区域中，观察到板状和杆状结构的混合物。肺泡区显示出更紧凑，板状骨小梁结构比基底区。在与基底骨的参数比较中，牙槽骨通常具有较高的骨体积分数、骨小梁厚度和骨小梁数量，以及较低的骨表面密度、骨小梁分离和结构模型指数。牙槽骨结构致密，含有大量厚板状骨小梁，能有效抵抗咀嚼力。当测量更接近基底骨时，观察到松散的结构，具有较低的骨体积和较少的薄杆状骨小梁。
This study investigated the three dimensional (3D) trabecular microstructure of the alveolar and basal bone in the mandible using micro-CT and compared the morphometric values of the different sites. Ten specimens were prepared and scanned using a micro-CT system. Both the alveolar and basal trabecular bone of the premolar region in the mandible were measured for the structural analysis. Cross-sectional 1024x1024 pixel images were created. From the two-dimensional (213) images produced, 3D structural images were reconstructed. After scanning the specimen, the volumes of interest (VOI) of the alveolar and basal bone regions were selected from the 3D reconstruction images, and the structural parameters such as bone volume fraction, bone surface density, trabecular thickness, trabecular separation, trabecular number and structural model index were analyzed. The trabecular structure showed a marked variation within the sites of the specimen, especially in the basal trabecular bone inferior to the mandibular canal. In both the alveolar and basal bone regions, a mixture of both plate-like and rod-like structures was observed. The alveolar region showed a more compact, plate-type trabecular structure than the basal regions. In parametric comparison with the basal bone, the alveolar bone generally had a higher bone volume fraction, bone trabecular thickness and trabecular number, and lower bone surface density, trabecular separation and structural model index. The alveolar bone consisted of a compact bone structure with a large amount of thick plate-type trabecular bone, which was effectively resistant to the masticatory forces. As the measurements were made closer to the basal bone, a loose structure was observed with lower bone volume and fewer, thin, rod-like trabeculae.