[1]唐洪涛,仝允辉,张美超,等.股骨颈骨折愈合后钉道植骨应力分布的有限元分析[J].中医正骨,2011,23(01):22-24.
　TANG Hong-tao*,TONG Yun-hui,ZHANG Mei-chao,et al.Finite element analysis of the stress distribution in femoral head and neck of bone grafting in nail path after femoral neck fracture healing[J].The Journal of Traditional Chinese Orthopedics and Traumatology,2011,23(01):22-24.
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股骨颈骨折愈合后钉道植骨应力分布的有限元分析()
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《中医正骨》[ISSN:1001-6015/CN:41-1162/R]

卷:
第23卷
期数:
2011年01期
页码:
22-24
栏目:
基础研究
出版日期:
2011-01-30

文章信息/Info

Title:
Finite element analysis of the stress distribution in femoral head and neck of bone grafting in nail path after femoral neck fracture healing
作者:
唐洪涛1; 仝允辉1; 张美超2; 赵卫东2
1.河南省洛阳正骨医院,河南 洛阳 471002;
2.南方医科大学,广东 广州 510515
Author(s):
TANG Hong-tao*; TONG Yun-hui; ZHANG Mei-chao; et al.*
Luoyang Orthopaedic Hospital,Luoyang 471002,Henan,China
关键词:
股骨颈骨折 股骨头坏死 生物力学 有限元分析
Keywords:
Femoral neck fractures;  Femur head necrosis;  Biomechanics;  Finite element analysis
摘要:
目的:探讨股骨颈骨折经空心加压螺钉固定,骨折愈合后取出螺钉遗留的钉道内是否应予植骨,为临床选择治疗方法提供依 据。方法:重建人体股骨头颈部的三维有限元仿真模型,模拟钉道不植骨与钉道植骨的股骨头颈部,对模型进行虚拟加载和仿真计 算。比较2种模型在同一载荷下的应力分布及位移情况。结果:不植骨模型的最大应力集中在股骨头负重区,植骨模型的最大应力 集中在股骨颈下方的内后侧处即股骨矩区,且不植骨模型股骨头负重区应力最大值(0.482 E+8)远远大于植骨模型应力最大值 (0.295 E+8); 钉道位置的位移测试显示,2组模型股骨头区位移最大,不植骨模型的股骨头区位移值(0.391 E-0.3)明显大于植骨 模型的股骨头区位移值(0.352 E-0.3)。结论:股骨颈骨折采用空心加压螺钉内固定,骨折愈合取出螺钉后钉道内植骨有利于提高 股骨头颈部的生物力学性能,预防因股骨头部应力过于集中导致的股骨头坏死塌陷。
Abstract:
Objective:To investigate the rationality of bone grafting in nail path after femoral neck fracture healing and internal fixator was removed so as to provide theoretical support for clinical therapy.Methods:Two three-dimensional finite element models of the femoral head and neck region were reconstructed after femoral neck fracture healing and internal fixator was removed,one undergone bone grafting.Both of the models were simulated under the load of body weight,and the stress and shift on the femoral head and neck were calculated and compared.Results:Analysis of the three-dimension finite element model showed that the massive stress concentrated on weight loading region of femoral head without bone grafting,while the massive stress concentrated on the region of calcar femorale of grafting-bone model.The max-stress value(0.482 E+8)in the weight loading region of femoral head without bone grafting was far higher than the max-stress value(0.295 E +8)of ungrafting-bone model.In the nail path shift test,value of shift in the region of femoral head of the ungrafting-bone model(0.391 E-0.3)significantly exceeded that of grafting-bone model(0.352 E- 0.3).Conclusion:For the treatment of femoral neck fracture with hollow compression screws,bone grafting in the channel of screw should be used to improve biomechanical integrity of femoral head and neck after fracture healed and hollow compression screws were taken out.This is of benefit to preventing the collapse of femoral head owing to excessive stress concentration on femoral head.

参考文献/References:

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更新日期/Last Update: 2011-01-30