【摘要】 目的 通过观察狗下颌骨骨折不同内固定后不同时期钙元素及骨愈合强度的变化，对加压促进骨愈合的机制进行初步探讨。方法 采用自身对照的方法，对12只狗下颌骨两侧体部造成人工骨折后，分别采用加压钢板及微型钢板做内固定。术后第2、4、6、8周通过钙元素测定，结合三点弯曲力学实验，分析了局部钙元素变化对不同固定侧骨愈合过程中骨愈合强度的影响。结果 骨折术后第2周、4周、6周加压钢板固定侧骨缝间钙元素含量明显高于对照侧(P<0.05)，术后第8周，两侧钙含量相近(P>0.05)。结论 在骨折愈合早期，加压固定侧骨痂中钙的沉积率和沉积速度较对侧高，导致加压钢板固定侧的骨愈合强度明显高于微型钢板固定侧。

    关键词 动力加压钢板 微型钢板 下颌骨骨折 钙 骨折愈合

    Study of calcium and bone healing intensity in hist after interfixation of mandibular fracture

    Ji Guanghui，Hu Kaijin，Li Xinjun，et al.

    Dept.of Oral and Maxillofacial Surgery，School of Stomatology， The Fourth Military Medical niversity，Xi’an710032.

    【Abstract】 Objective In order to understand the mechanism of stimulative effects of compression plate on bone healing in the treatment of mandibular fracture.Methods In the present study，artificial mandibular fractures were made in12dogs bilaterally with a self-made bone-fracturing forceps，fixed with compression plates on the tested side and mini-plates on the control.The fracture healing process was investigated by the means of biomechanˉics and determination of calcium2w ......