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[目的]通过影像学观察膝关节肿瘤假体与骨结合部皮质外骨桥的形成情况。[方法]33例膝关节周围肿瘤患者行瘤段骨切除、定制型假体置换术,其中20例植骨,13例未植骨。影像学观察皮质外骨桥的形成情况,评估患者术后肢体功能。[结果]平均随访26个月。所有20例植骨者均有骨桥形成,未植骨者10例有骨桥形成、3例无骨桥形成;25例存在皮质外骨桥下透亮线。按Enneking骨骼肌肉肿瘤术后下肢功能评分标准,33例患者平均功能恢复率为74.3%;[结论]植骨有利于皮质外骨桥生长,皮质外骨桥偏向性生长与局部压应力相适应;透亮线的存在说明目前的假体设计技术可能达不到骨长入性生长。
[Objective] To observe the formation of cortical bone bridge between knee prosthesis and osseous junction through imaging. [Method] Thirty-three patients with tumors around the knee underwent tumor resection and customized prosthesis replacement, including 20 bone grafts and 13 non-grafting patients. Imaging observation of cortical bone bridge formation, assessment of patients with postoperative limb function. [Results] The average follow-up of 26 months. All 20 cases had bone bridge formation. There were 10 cases with no bone bridge and 3 cases without bone bridge in 25 cases. The average functional recovery rate of 33 patients was 74.3% according to Enneking skeletal muscle tumor postoperative function score of the lower limbs. [Conclusion] Bone grafting is beneficial to the growth of cortical extraoral bone bridge, and the lateral growth of cortical bone bridge is compatible with local compressive stress. The existence of the present shows that the current prosthesis design techniques may not reach the bone growth.