The biomechanics analysis for dynamic hip screw on osteoporotic and unstable femoral fracture

H. F. Wu, K. A. Lai, M. T. Huang, H. S. Chen, K. C. Chung, F. S. Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Osteoporotic patient has low bone quality and often occur unstable fracture. Conventional dynamic hip screw method can provide good result on stable femoral fracture. On the unstable femoral fracture, it has high failure rate. The purpose is to investigate the biomechanics analysis for dynamic hip Screw on osteoporotic and unstable proximal femoral fracture. The specific aims are to :(1) develop the osteoporotic and unstable proximal femoral fractures model,(2) investigate the influence of lesser trochanter fixation on stress and deformation distribution. This study total reviewed 130 patients treated by dynamic hip screw surgery and classified the fracture according to AO system. Statistic data showed that the common unstable femoral proximal fracture type is A2.1 (AO classification). The osteoporotic femur model of finite element method (FEM) was developed from the CT image of 80 years patient. Loading condition assigned single-leg stance. The FEM analytic result show the lesser trochanter has a moment of rotation in dynamic fixation without wires fixation condition. Using wires to fix the lesser trochanter can enhance the structure stiffness and reduce the stress distribution in unstable intertrochanter fracture (A2.1 type).

Original languageEnglish
Title of host publication5th Kuala Lumpur International Conference on Biomedical Engineering 2011, BIOMED 2011
Pages225-228
Number of pages4
DOIs
Publication statusPublished - 2011 Jul 11
Event5th Kuala Lumpur International Conference on Biomedical Engineering, BIOMED 2011, Held in Conjunction with the 8th Asian Pacific Conference on Medical and Biological Engineering, APCMBE 2011 - Kuala Lumpur, Malaysia
Duration: 2011 Jun 202011 Jun 23

Publication series

NameIFMBE Proceedings
Volume35 IFMBE
ISSN (Print)1680-0737

Other

Other5th Kuala Lumpur International Conference on Biomedical Engineering, BIOMED 2011, Held in Conjunction with the 8th Asian Pacific Conference on Medical and Biological Engineering, APCMBE 2011
CountryMalaysia
CityKuala Lumpur
Period11-06-2011-06-23

Fingerprint

Biomechanics
Wire
Finite element method
Surgery
Stress concentration
Bone
Stiffness
Statistics

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biomedical Engineering

Cite this

Wu, H. F., Lai, K. A., Huang, M. T., Chen, H. S., Chung, K. C., & Yang, F. S. (2011). The biomechanics analysis for dynamic hip screw on osteoporotic and unstable femoral fracture. In 5th Kuala Lumpur International Conference on Biomedical Engineering 2011, BIOMED 2011 (pp. 225-228). (IFMBE Proceedings; Vol. 35 IFMBE). https://doi.org/10.1007/978-3-642-21729-6_60
Wu, H. F. ; Lai, K. A. ; Huang, M. T. ; Chen, H. S. ; Chung, K. C. ; Yang, F. S. / The biomechanics analysis for dynamic hip screw on osteoporotic and unstable femoral fracture. 5th Kuala Lumpur International Conference on Biomedical Engineering 2011, BIOMED 2011. 2011. pp. 225-228 (IFMBE Proceedings).
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Wu, HF, Lai, KA, Huang, MT, Chen, HS, Chung, KC & Yang, FS 2011, The biomechanics analysis for dynamic hip screw on osteoporotic and unstable femoral fracture. in 5th Kuala Lumpur International Conference on Biomedical Engineering 2011, BIOMED 2011. IFMBE Proceedings, vol. 35 IFMBE, pp. 225-228, 5th Kuala Lumpur International Conference on Biomedical Engineering, BIOMED 2011, Held in Conjunction with the 8th Asian Pacific Conference on Medical and Biological Engineering, APCMBE 2011, Kuala Lumpur, Malaysia, 11-06-20. https://doi.org/10.1007/978-3-642-21729-6_60

The biomechanics analysis for dynamic hip screw on osteoporotic and unstable femoral fracture. / Wu, H. F.; Lai, K. A.; Huang, M. T.; Chen, H. S.; Chung, K. C.; Yang, F. S.

5th Kuala Lumpur International Conference on Biomedical Engineering 2011, BIOMED 2011. 2011. p. 225-228 (IFMBE Proceedings; Vol. 35 IFMBE).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - Osteoporotic patient has low bone quality and often occur unstable fracture. Conventional dynamic hip screw method can provide good result on stable femoral fracture. On the unstable femoral fracture, it has high failure rate. The purpose is to investigate the biomechanics analysis for dynamic hip Screw on osteoporotic and unstable proximal femoral fracture. The specific aims are to :(1) develop the osteoporotic and unstable proximal femoral fractures model,(2) investigate the influence of lesser trochanter fixation on stress and deformation distribution. This study total reviewed 130 patients treated by dynamic hip screw surgery and classified the fracture according to AO system. Statistic data showed that the common unstable femoral proximal fracture type is A2.1 (AO classification). The osteoporotic femur model of finite element method (FEM) was developed from the CT image of 80 years patient. Loading condition assigned single-leg stance. The FEM analytic result show the lesser trochanter has a moment of rotation in dynamic fixation without wires fixation condition. Using wires to fix the lesser trochanter can enhance the structure stiffness and reduce the stress distribution in unstable intertrochanter fracture (A2.1 type).

AB - Osteoporotic patient has low bone quality and often occur unstable fracture. Conventional dynamic hip screw method can provide good result on stable femoral fracture. On the unstable femoral fracture, it has high failure rate. The purpose is to investigate the biomechanics analysis for dynamic hip Screw on osteoporotic and unstable proximal femoral fracture. The specific aims are to :(1) develop the osteoporotic and unstable proximal femoral fractures model,(2) investigate the influence of lesser trochanter fixation on stress and deformation distribution. This study total reviewed 130 patients treated by dynamic hip screw surgery and classified the fracture according to AO system. Statistic data showed that the common unstable femoral proximal fracture type is A2.1 (AO classification). The osteoporotic femur model of finite element method (FEM) was developed from the CT image of 80 years patient. Loading condition assigned single-leg stance. The FEM analytic result show the lesser trochanter has a moment of rotation in dynamic fixation without wires fixation condition. Using wires to fix the lesser trochanter can enhance the structure stiffness and reduce the stress distribution in unstable intertrochanter fracture (A2.1 type).

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Wu HF, Lai KA, Huang MT, Chen HS, Chung KC, Yang FS. The biomechanics analysis for dynamic hip screw on osteoporotic and unstable femoral fracture. In 5th Kuala Lumpur International Conference on Biomedical Engineering 2011, BIOMED 2011. 2011. p. 225-228. (IFMBE Proceedings). https://doi.org/10.1007/978-3-642-21729-6_60