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首页> 外文期刊>Journal of orthopaedic research >Effects of radiation and surgery on healing of femoral fractures in a rat model
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Effects of radiation and surgery on healing of femoral fractures in a rat model

机译:放射线和手术对大鼠模型股骨骨折愈合的影响

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摘要

Management of soft tissue sarcoma involves multimodality treatment, including surgery and radiotherapy. Pathologic fracture of the femur after such treatment in the thigh is one serious, late complication and nonunion rates of 80-90% are reported. We hypothesize that the combination of radiotherapy and periosteal stripping (during tumor resection) leads to greater impairment of the fracture repair process than either intervention alone. Female Wistar retired breeder rats were randomized into four treatment groups (control, radiotherapy, surgery, and combination of radiotherapy and surgery) and three end-points (21, 28, and 35 days post-fracture). Designated animals first underwent radiotherapy, followed by surgical stripping of the periosteum 3 weeks later and femoral fracture with fixation after another 3 weeks. Animals were sacrificed and fractures examined using microCT and histomorphometry. Simple transverse or short oblique femoral fractures were produced. By 35 days, control animals formed unions, periosteum-stripped animals formed hypertrophic non-unions and irradiated animals formed atrophic non-unions. Histomorphometry revealed an absence of chondroid and osteoid production in animals undergoing radiotherapy. The relative contribution of periosteal stripping to occurrence of non-union was statistically insignificant. Radiation prior to fracture reliably resulted in atrophic non-union in our model. The contribution of periosteal stripping was negligible.
机译:软组织肉瘤的治疗涉及多种形式的治疗,包括手术和放疗。大腿这种治疗后股骨的病理性骨折是一种严重的并发症,据报道晚期并发症和骨不连发生率为80-90%。我们假设放疗和骨膜剥离(在肿瘤切除过程中)的组合比单独的任何干预对骨折修复过程的损害更大。将Wistar雌性退休种鼠随机分为四个治疗组(对照组,放疗,手术以及放疗和手术的组合)和三个终点(骨折后21、28和35天)。指定的动物首先接受放射治疗,然后在3周后手术剥离骨膜,再在3周后进行固定的股骨骨折。处死动物并使用microCT和组织形态学检查骨折。产生了简单的横向或短斜股骨骨折。到35天时,对照动物形成工会,剥去骨膜的动物形成肥厚性不愈合的工会组织,辐照的动物形成萎缩性不愈合的工会。组织形态测定法表明在接受放射治疗的动物中不存在软骨样和类骨质的产生。骨膜剥离对不愈合发生的相对贡献在统计学上不显着。骨折前的辐射可靠地导致我们模型中的萎缩性骨不连。骨膜剥离的贡献可忽略不计。

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