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ARUP; ISBN: 978-0-9562121-5-3 - CMBBE 2012 - Cardiff University

ARUP; ISBN: 978-0-9562121-5-3 - CMBBE 2012 - Cardiff University

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6. CONCLUSION<br />

Fig 7. Analysis results of femoral nail (Stress).<br />

Recently in Japan, the femoral nail made of titanium alloy that used for treatment has<br />

apprehended the complications that inhibit the bone healing due to stress-shielding and<br />

occur fracture at the distal end of the stem. In this study, in order to solve these<br />

problems, we proposed the original PEEK femoral nail that constructs the<br />

biocompatible plastic (PEEK) with three types of elastic modulus, we had performed<br />

FEM analysis on the new design to investigate the validity of this grand design.<br />

By the result of FEM analysis, granting the strain that encourage the formation of callus<br />

to the bone and relaxation of stress concentration at the distal end of the stem were<br />

confirmed on the original PEEK femoral nail that was proposed in this paper when<br />

compared with the femoral nail made of titanium alloy. The validity against the<br />

complications of grand design was found.<br />

7. REFERENCE<br />

1) Frost H. M., Bone’s Mechanostat A 2003Update. THE ANATOMICAL RECORD<br />

PART A, 2003, Vol. 275A, 1081-1101.<br />

2) Evans E. M., The treatment of trochanteric fractures of the femur, J. Bone Joint Surg,<br />

1949, Vol. 31-B, 190-203.<br />

3) Lutz Claes, Peter August, et al., Influence of Size and Stability of the Osteotomy<br />

Gap on the Success of Fracture Healing, Journal of Orthopaedic Research, 1997,<br />

577-584.<br />

4) Motoo YOUKAICHIYA, Toshiaki HARA et al., An experimental study on double<br />

lag screw system for osteosynthesis of intertrochanteric fracture, Japanese Journal of<br />

Clinical Biomechanics, 1997, Vol. 18, 413-420, in Japanese.<br />

5) Orr T. E., Computer Predictions of Bone Remodeling Around Porous-coated Implant,<br />

J, Arthroplasty, 1990, Vol. 5, 191-198.<br />

6) Cummings S. R., Melton L. J., Eqidemiology and outcomes of osteoporotic fracture,<br />

J. THE LANCET, 2002, Vol. 359, 1761-1767.

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