目的：按照生物力学原理，对传统的钢板加以改进，本文作者研制出一种新型内固定器械──齿接触半环抱槽式加压钢板（Ｃｏｍｐｒｅｓｓ ｓｔｅｅｌ ｐｌａｔｅ ｏｆ ｇｅａｒ ｃｏｎｔａｃｔ ｈａｌｆ ｃｙｃｌｅ ａｎｄ ｃｈａｎｎｅｌ ｔｙｐｅ ＧＣＣ），对其力学性能进行生物力学测试，为临床应用提供依据。方法：采用９具新鲜成年湿润尸体肱骨标本，随机分为３组，原始骨（Ｎ）组、实验（ＧＣＣ）组，普通加压钢板（ＧＣＰ）组，分别进行生物力学测试，对其数据进行结果分析。结果：在固定强度、刚度、稳定性、承载能力等方面ＧＣＣ组均明显优于普通加压钢板（ＧＣＰ）组。结论：齿接触半环抱槽式加压钢板内固定在治疗肱骨骨折中，生物力学性能优良。该器械结构设计合理、安全可靠。

Obstract: Through the development of traditional steel plate according to the biomechanic principle of fracture stabilization, author developed a new kind of internal fixture-compress steel plate of gear contact half cycle and channel type（GCC）and then made a biomechanic test on it in order to provide experimental bases for safety clinical practice。METHOD：Nine fresh adult moist cadaveric humerus specimens used in the experiment were divided into three groups at random。Normal bone group（N），Test group（GCC）and general compress plate group（GCP）were made biomechanic test respectively and the experimental data were analysed。RESULTS:The effect of fixation strength，stiffness，stability and ultimate compress strength by GCC is better than that of general compress plate(GCP)。CONCLUSIONS：Being used in long bone fracture，the internal fixture of GCC is firm，dependable and GCC'S biomechanic performance is superior。This instrument of reasonable structure is safe，simple and practical and it can be widely used in clinical practice。