2006
DOI: 10.2106/jbjs.e.01024
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Surgical Treatment of Femoroacetabular Impingement: Evaluation of the Effect of the Size of the Resection

Abstract: Resection of up to 30% of the anterolateral quadrant of the head-neck junction did not significantly alter the load-bearing capacity of the proximal part of the femur. However, a 30% resection significantly decreased the amount of energy required to produce a fracture. Thirty percent should be considered to be the greatest feasible amount of resection because of the change in the pattern of the femoral head-neck response to axial loads that we observed.

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Cited by 122 publications
(177 citation statements)
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“…Although their strength decreases with deeper resections, our in vitro biomechanical tests and computer simulations support that ovine femurs should not be at immediate risk of fracture for surgeries up to 36% neck diameter, which is analogous to human femurs [13]. Using ovine material, our study also yielded the first evidence of QCT-based FE models predicting worsening of femurs after head-neck osteoplasty.…”
Section: Discussionsupporting
confidence: 59%
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“…Although their strength decreases with deeper resections, our in vitro biomechanical tests and computer simulations support that ovine femurs should not be at immediate risk of fracture for surgeries up to 36% neck diameter, which is analogous to human femurs [13]. Using ovine material, our study also yielded the first evidence of QCT-based FE models predicting worsening of femurs after head-neck osteoplasty.…”
Section: Discussionsupporting
confidence: 59%
“…Two-sided level of significance of 5%, beta error of 20%, estimated load to failure of 2.4 kN after offset creation, 4.0 kN for the intact contralateral side, and an estimated SD of 1.0 kN were chosen resulting in a minimal sample size of five hips per group. Input data for the power analysis were derived from a similar cadaver experiment in humans [13] given comparable contact pressure distribution, magnitude, and mean surface stresses [15]. Each group was therefore composed of six samples to minimize alpha and beta errors.…”
Section: Discussionmentioning
confidence: 99%
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“…It is well-documented that cam FAI is a result of decreased concavity of the femoral head-neck junction [2,14,22,26], which causes jamming of the proximal femur into the acetabulum [15,24]. There is further evidence that cam impingement is caused by decreased femoral anteversion [15], which reduces femoral neck clearance from the acetabular rim during hip flexion and internal rotation [15,24].…”
Section: Discussionmentioning
confidence: 99%
“…Pincer impingement is related to overcoverage of the acetabulum, such as with acetabular retroversion and coxa profunda [18]. Cam impingement is caused by increased bone volume at the femoral head-neck junction, most commonly in the anterosuperior region [2,14,22,26]. Increased bone volume at the femoral head-neck junction causes impingement between the acetabulum and the proximal femur.…”
Section: Introductionmentioning
confidence: 99%