Spatial mapping of humeral head bone density.
Spatial mapping of humeral head bone density.
复制标题
肱骨头密度的空间映射。
DOI：
10.1016/j.jse.2017.03.006
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发表时间：
2017-09
影响因子：
3
通讯作者：
Jeffers J
中科院分区：
文献类型：
--
作者：
Alidousti H;Giles JW;Emery RJH;Jeffers J
短柄肱骨置换通过锚定到干骺端松质骨实现固定。将植入物固定在高密度骨中可以提供牢固的固定并降低松动的风险。然而，缺乏肱骨近端骨密度分布的数据。本研究的目的是调查肱骨近端的骨密度。八个健康的尸体肱骨计算机断层扫描被用来映射骨密度分布在肱骨头。肱骨近端头平行于肱骨解剖颈分为12层。然后将每个切片分成4个同心圆。解剖颈下方的切片（短柄植入物具有固定特征）进一步分为径向部分。计算每个区域的平均骨密度，并使用重复测量方差分析比较感兴趣区域，显着性设定为P <0.05。平均表观骨密度从近端到远端逐渐降低，大多数较高的骨密度位于肱骨解剖颈近端（P <0.05）。在解剖颈部以下，骨密度从中心到周边区域增加，在那里皮质骨最终占据空间（P <0.05）。在解剖颈下方的远端切片中，还观察到内侧股骨距区域的骨密度分布较高。本研究表明，在植入物固定方面，保留解剖颈和骺板上方的一些骨并使用周围的致密骨是有利的。
Short-stem humeral replacements achieve fixation by anchoring to the metaphyseal trabecular bone. Fixing the implant in high-density bone can provide strong fixation and reduce the risk of loosening. However, there is a lack of data mapping the bone density distribution in the proximal humerus. The aim of the study was to investigate the bone density in proximal humerus. Eight computed tomography scans of healthy cadaveric humeri were used to map bone density distribution in the humeral head. The proximal humeral head was divided into 12 slices parallel to the humeral anatomic neck. Each slice was then divided into 4 concentric circles. The slices below the anatomic neck, where short-stem implants have their fixation features, were further divided into radial sectors. The average bone density for each of these regions was calculated, and regions of interest were compared using a repeated-measures analysis of variance with significance set at P < .05. Average apparent bone density was found to decrease from proximal to distal regions, with the majority of higher bone density proximal to the anatomic neck of the humerus (P < .05). Below the anatomic neck, bone density increases from central to peripheral regions, where cortical bone eventually occupies the space (P < .05). In distal slices below the anatomic neck, a higher bone density distribution in the medial calcar region was also observed. This study indicates that it is advantageous with respect to implant fixation to preserve some bone above the anatomic neck and epiphyseal plate and to use the denser bone at the periphery.
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影响因子：
2.4
作者：
Yakacki, Christopher M.;Poukalova, Mariya;Guldberg, Robert E.;Lin, Angela;Saing, Minn;Gillogly, Scott;Gall, Ken
通讯作者：
Gall, Ken
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2.4
作者：
Poukalova, Mariya;Yakacki, Christopher M.;Gall, Ken
通讯作者：
Gall, Ken
影响因子：
2.4
作者：
Prendergast, PJ;Huiskes, R;Soballe, K
通讯作者：
Soballe, K