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Three-dimensional characterization of trabecular bone mineral density of the proximal ulna using quantitative computed tomography.

利用定量计算机断层扫描对尺骨近端骨小梁骨密度进行三维表征。

  • 影响因子:3.05
  • DOI:10.1016/j.jse.2019.09.040
  • 作者列表:"Gil JA","DaSilva K","Johnson E","DaSilva MF","Pidgeon TS
  • 发表时间:2020-04-01
Abstract

BACKGROUND:Although previous studies have measured general proximal forearm bone mineral density (BMD), no study has systematically mapped the 3-dimensional trabecular BMD of the proximal ulna. The aim of this study was to describe the 3-dimensional distribution of the trabecular bone density of the proximal ulna. We hypothesize a variable distribution of proximal ulna trabecular BMD depending on the region of interest (ROI). METHODS:Computed tomographic (CT) scans of 9 fresh-frozen cadaveric proximal ulna specimens with a mean age of 59.3 ± 8.1 years were studied. Each CT file was converted from DICOM to a QCT file that could be analyzed using QCT software (QCT Pro Version 6.1, Model 4 CT Calibration Phantom; MindWays Software Inc, Austin, TX, USA). The ROIs were defined as spheres of trabecular bone 3 mm in diameter located throughout the proximal ulna. RESULTS:ROIs proximal to the trochlear notch demonstrated higher BMD than ROIs distal to the trochlear notch. Furthermore, volar ROIs adjacent to the ulnohumeral joint tended to have higher BMD than dorsal ROIs. The highest BMD was found in the tip of the olecranon. CONCLUSION:Hardware in fixation constructs for proximal ulnar fractures should be directed toward ROIs with the highest BMD to maximize purchase. Hardware should approach the ulnohumeral joint without penetrating the joint to capture trabecular bone with the highest BMD. The most important fixation in such a construct will be that which captures trabecular bone with maximum BMD proximal to the trochlear notch (eg, the tip of the olecranon).

摘要

背景: 虽然以前的研究已经测量了前臂近端的一般骨密度 (BMD),但是还没有研究系统地绘制尺骨近端的三维骨小梁BMD。本研究的目的是描述尺骨近端骨小梁密度的三维分布。我们假设尺骨近侧小梁BMD的可变分布取决于感兴趣区域 (ROI)。 方法: 对平均年龄为59.3 ± 8.1岁的9例新鲜冷冻尸体尺骨近端标本进行CT扫描。每个CT文件从DICOM转换为QCT文件,该QCT文件可以使用QCT软件 (QCT Pro版本6.1,Model 4 ct校准幻影; MindWays software Inc,Austin,TX,USA) 进行分析。Roi被定义为位于整个尺骨近端的直径为3毫米毫米的骨小梁球。 结果: 接近滑车切迹的ROIs比接近滑车切迹的ROIs表现出更高的BMD。此外,与肱骨上端关节相邻的掌侧关节具有比背侧关节更高的BMD。在鹰嘴的尖端发现了最高的BMD。 结论: 近端尺骨骨折固定结构中的硬件应针对具有最高BMD的roi,以最大限度地购买。硬件应接近肱骨干关节,而不穿透关节,以捕获具有最高BMD的骨小梁。在这种结构中最重要的固定将是在滑车凹口 (例如,鹰嘴的尖端) 附近捕获具有最大BMD的骨小梁。

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影响因子:2.98
发表时间:2020-01-01
DOI:10.1136/neurintsurg-2019-014962
作者列表:["Guo W","Liu H","Tan Z","Zhang X","Gao J","Zhang L","Guo H","Bai H","Cui W","Liu X","Wu X","Luo J","Qu Y"]

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