TY - JOUR
T1 - Prosthesis design and stress profile after hip resurfacing
T2 - a finite element analysis.
AU - Heijink, A.
AU - Zobitz, M. E.
AU - Nuyts, R.
AU - Morrey, B. F.
AU - An, K. N.
N1 - Copyright:
This record is sourced from MEDLINE/PubMed, a database of the U.S. National Library of Medicine
PY - 2008/12
Y1 - 2008/12
N2 - PURPOSE: To evaluate the effect of prosthesis design on stress profile in the proximal femur after hip resurfacing. METHODS: The von Mises stress profile of the native femur was simulated and compared with that of resurfaced femurs using various prosthetic materials (titanium, cobalt-chrome, ceramic), stem lengths (normal, half, short, and no stem), and femoral head coverage (shell size) [260 degrees, 220 degrees, 180 degrees, and 140 degrees]. RESULTS: Hip resurfacing altered the stress profile of the cancellous (but not cortical) bone of the femoral neck. Maximal cortical stresses were observed at the posterior half of the medial femoral neck. The stress profile of the native femur was most similar to that of the resurfaced femur made of titanium, with a short or no stem and 260 degrees of femoral head coverage (shell size). CONCLUSION: Optimising prosthesis design by minimising biomechanical alterations seems a valid approach to achieving favourable long-term outcomes. Cadaveric and in vivo studies are needed to confirm the clinical relevance and feasibility.
AB - PURPOSE: To evaluate the effect of prosthesis design on stress profile in the proximal femur after hip resurfacing. METHODS: The von Mises stress profile of the native femur was simulated and compared with that of resurfaced femurs using various prosthetic materials (titanium, cobalt-chrome, ceramic), stem lengths (normal, half, short, and no stem), and femoral head coverage (shell size) [260 degrees, 220 degrees, 180 degrees, and 140 degrees]. RESULTS: Hip resurfacing altered the stress profile of the cancellous (but not cortical) bone of the femoral neck. Maximal cortical stresses were observed at the posterior half of the medial femoral neck. The stress profile of the native femur was most similar to that of the resurfaced femur made of titanium, with a short or no stem and 260 degrees of femoral head coverage (shell size). CONCLUSION: Optimising prosthesis design by minimising biomechanical alterations seems a valid approach to achieving favourable long-term outcomes. Cadaveric and in vivo studies are needed to confirm the clinical relevance and feasibility.
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U2 - 10.1177/230949900801600312
DO - 10.1177/230949900801600312
M3 - Article
C2 - 19126900
AN - SCOPUS:65449171124
SN - 1022-5536
VL - 16
SP - 326
EP - 332
JO - Journal of the Western Pacific Orthopaedic Association
JF - Journal of the Western Pacific Orthopaedic Association
IS - 3
ER -