The development of temporomandibular joint implants has involved simplified mechanical tests that apply pure vertical forces or pure rotational movements to the implant. The aim of this study was to develop a biological based mastication mechanism and conduct preliminary testing of a novel temporomandibular joint implant. The mechanism was designed to mimic temporomandibular joint loads by performing compression and anterior/posterior translation. Pilot testing was performed on six implant/joint specimens for seven consecutive hours, completing approximately 22,000 cycles at a frequency of approximately 1 Hz. Each cycle had a joint compression phase (67.3 N over 0.15 s) followed by a translation phase (8.67 N over 0.43 s) that was similar to joint loads/motions that have been reported in vivo. This new mastication mechanism incorporates both anatomical and mechanical variability. The use of biological specimens is an important approach that can help bridge the gap between traditional synthetic implant materials/mechanical testing and in vivo testing.

中文翻译：

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设计用于测试颞下颌关节植入物的咀嚼机制

颞下颌关节植入物的开发涉及简化的机械测试，该测试将纯垂直力或纯旋转运动应用于植入物。这项研究的目的是开发一种基于生物学的咀嚼机制，并对新型颞下颌关节植入物进行初步测试。该机制旨在通过执行压缩和前/后平移来模拟颞下颌关节负荷。对六个植入物/关节标本进行了七个连续小时的先导测试，以大约1 Hz的频率完成了大约22,000个循环。每个循环都有一个关节压缩阶段（0.15秒内为67.3 N），然后是一个平移阶段（0.43 s内为8.67 N），类似于体内报道的关节负荷/运动。这种新的咀嚼机制兼具解剖学和机械可变性。使用生物标本是一种重要的方法，可以帮助弥合传统合成植入物材料/机械测试与体内测试。