Dynamic compressive properties of the mandibular condylar cartilage
Dynamic compressive properties of the mandibular condylar cartilage
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DOI：
10.1177/154405910608500618
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发表时间：
2006-06-01
影响因子：
7.6
通讯作者：
Tanne, K.
中科院分区：
文献类型：
--
作者：
Tanaka, E.;Yamano, E.;Tanne, K.
髁突软骨在下颌骨功能活动中起着重要的应力吸收作用。然而，相对较少的信息是其压缩下的动态特性。我们假设这些属性是区域特异性的，并且取决于加载频率。为了表征髁突软骨的粘弹性，我们进行了动态压痕测试在很宽的加载频率范围。使用10个猪下颌骨髁突;关节面分为4个区域，前内侧、前外侧、后内侧和后外侧。动态复合物，存储和损耗模量随频率增加，这些值是最高的前内侧区域。损耗角正切随频率从0.68降低到0.17，但没有发现区域差异。本研究结果表明，动态压缩模量是区域特异性的，是依赖于加载频率，这可能有重要意义的负载在颞下颌关节的传输。
The mandibular condylar cartilage plays an important role as a stress absorber during function. However, relatively little information is available on its dynamic properties under compression. We hypothesized that these properties are region-specific and depend on loading frequency. To characterize the viscoelastic properties of the condylar cartilage, we performed dynamic indentation tests over a wide range of loading frequencies. Ten porcine mandibular condyles were used; the articular surface was divided into 4 regions, anteromedial, anterolateral, posteromedial, and posterolateral. The dynamic complex, storage, and loss moduli increased with frequency, and these values were the highest in the anteromedial region. Loss tangent decreased with frequency from 0.68 to 0.17, but a regional difference was not found. The present results suggest that the dynamic compressive modulus is region-specific and is dependent on the loading frequency, which might have important implications for the transmission of load in the temporomandibular joint.