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首页> 外文期刊>Journal of shoulder and elbow surgery >Correlation between mineralization and mechanical strength of the subchondral bone plate of the humeral head
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Correlation between mineralization and mechanical strength of the subchondral bone plate of the humeral head

机译：肱骨头软骨下骨板矿化与机械强度的相关性

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Background: One of the main problems in shoulder arthroplasty is the fixation of the prosthesis, where the subchondral bone plate plays an important role. Subchondral mineralization patterns represent the loading history of a joint and give information about the individual biomechanical situation. The objective of this study was to determine if a correlation between subchondral mineralization and mechanical strength in the humeral head exists. Materials and methods: Subchondral mineralization of 32 shoulder specimens was investigated by use of computed tomography (CT) osteoabsorptiometry. The previously dissected specimens were scanned axially in a CT scanner, and the obtained data sets were transferred into an image analyzing system. Maximum intensity projection was used to evaluate the density distribution of the subchondral bone plate. To get information about mechanical strength of the subchondral bone, each specimen was investigated at 29 predefined points by means of an indentation-testing machine. Results: The maximum strength was mostly detected in the center (monocentric pattern) or in anterior and posterior areas of the articular surface (bicentric pattern). The distribution of mineralization showed the same 2 reproducible patterns. The coefficient of correlation between mechanical strength and mineralization shown on CT was between 0.59 and 0.96. The obtained information was statistically significant (P <.01). Conclusion: Mechanical strength and subchondral mineralization in the humeral head are significantly associated (P <.01). As a consequence of these findings, CT osteoabsorptiometry can be indirectly used to give information about bone quality in vivo. Our findings could be useful for the development of new fixation methods in shoulder surgery (eg, humeral resurfacing arthroplasty).
机译：背景：肩关节置换术的主要问题之一是假体的固定，其中软骨下骨板起着重要的作用。软骨下矿化模式代表关节的负荷历史，并提供有关单个生物力学情况的信息。这项研究的目的是确定软骨下矿化与肱骨头的机械强度之间是否存在相关性。材料和方法：使用计算机断层扫描（CT）骨吸收法研究了32个肩部标本的软骨下矿化。先前解剖的标本在CT扫描仪中进行轴向扫描，并将获得的数据集转移到图像分析系统中。使用最大强度投影来评估软骨下骨板的密度分布。为了获得有关软骨下骨机械强度的信息，每个样本都通过压痕测试机在29个预定点进行了研究。结果：最大强度主要在关节表面的中心（单中心模式）或前后区域（双中心模式）中检测到。矿化分布显示出相同的两种可再现模式。 CT显示的机械强度与矿化之间的相关系数在0.59至0.96之间。所获得的信息具有统计学意义（P <.01）。结论：肱骨头的机械强度和软骨下矿化显着相关（P <.01）。这些发现的结果是，CT骨吸收测量法可间接用于提供体内骨骼质量的信息。我们的发现可能有助于开发新的肩部手术固定方法（例如，肱骨表面置换置换术）。

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