The role of ankle ligaments and articular geometry in stabilizing the ankle
The role of ankle ligaments and articular geometry in stabilizing the ankle
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DOI：
10.1016/j.clinbiomech.2011.08.015
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发表时间：
2012-02-01
影响因子：
1.8
通讯作者：
An, Kai-Nan
中科院分区：
文献类型：
--
作者：
Watanabe, Kota;Kitaoka, Harold B.;An, Kai-Nan
背景资料：踝关节稳定性是多种因素的函数，但目前尚不清楚韧带等外在因素和关节面几何结构等内在因素在多大程度上起作用。本研究的目的是确定的韧带和关节的几何形状踝关节的稳定性的贡献，并确定踝关节的位置和模拟生理负荷后踝关节stability.Methods的影响：16具尸体下肢进行了研究，在卸载和轴向负荷相当于体重。在中立、背屈和跖屈踝关节位置进行前后、内外平移和内外旋转测试。完整的踝关节的稳定性进行了测量;踝关节韧带连续切片和retested.Findings：对于卸载条件下，外侧韧带占前稳定性的70%至80%，三角韧带占后稳定性的50%至80%。两种韧带对旋转稳定性的贡献率为50%-80%;然而，韧带并不提供内外侧稳定性的主要限制。在踝关节负重条件下，关节几何结构对平移稳定性的贡献率为100%，对旋转稳定性的贡献率为60%。踝关节是不太稳定的跖屈和更稳定的背flexion.Interpretation：踝关节的稳定性的外在和内在的元素的贡献是依赖于所施加的力的负载和方向。这项研究强调了在重建手术中恢复踝关节周围软组织的解剖条件的重要性。(C)2011爱思唯尔有限公司保留所有权利。
Background: Ankle joint stability is a function of multiple factors, but it is unclear to what extent extrinsic factors such as ligaments and intrinsic elements such as geometry of the articular surfaces play a role. The purposes of this study were to determine the contribution of the ligaments and the articular geometry to ankle stability and to determine the effects of ankle position and simulated physiological loading upon ankle stability.Methods: Sixteen cadaveric lower extremities were studied in unloaded and with axial load equivalent to body weight. Anterior-posterior, medial-lateral translation and internal-external rotation tests were performed in neutral, dorsiflexion and plantarflexion ankle positions. Intact ankle stability was measured; ankle ligaments were serially sectioned and retested.Findings: For unloaded condition, the lateral ligament accounted for 70% to 80% of anterior stability and the deltoid ligaments for 50% to 80% of posterior stability. Both ligaments contributed 50% to 80% to rotational stability; however, the ligaments did not provide the primary restraints to medial-lateral stability. For loaded ankle condition, articular geometry contributed 100% to translational and 60% to rotational stability. The ankle was less stable in plantarflexion and more stable in dorsiflexion.Interpretation: The contribution of extrinsic and intrinsic elements to ankle stability is dependent upon the load and direction of force applied. This study underscores the importance of restoring soft tissues about the ankle to the anatomic condition during reconstruction operations for instability, trauma and arthritis. (C) 2011 Elsevier Ltd. All rights reserved.