Femoroacetabular impingement osteoplasty: is any resected amount safe? A laboratory based experiment with sawbones

The Bone & Joint Journal
B W LohR S Page

Abstract

There is an increased risk of fracture following osteoplasty of the femoral neck for cam-type femoroacetabular impingement (FAI). Resection of up to 30% of the anterolateral head-neck junction has previously been considered to be safe, however, iatrogenic fractures have been reported with resections within these limits. We re-evaluated the amount of safe resection at the anterolateral femoral head-neck junction using a biomechanically consistent model. In total, 28 composite bones were studied in four groups: control, 10% resection, 20% resection and 30% resection. An axial load was applied to the adducted and flexed femur. Peak load, deflection at time of fracture and energy to fracture were assessed using comparison groups. There was a marked difference in the mean peak load to fracture between the control group and the 10% resection group (p < 0.001). The control group also tolerated significantly more deflection before failure (p < 0.04). The mean peak load (p = 0.172), deflection (p = 0.547), and energy to fracture (p = 0.306) did not differ significantly between the 10%, 20%, and 30% resection groups. Any resection of the anterolateral quadrant of the femoral head-neck junction for FAI significantly reduces the load-beari...Continue Reading

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Mar 25, 2016·Journal of Hip Preservation Surgery·Ajay Malviya
Dec 29, 2015·Current Opinion in Pediatrics·Rubini Pathy, Ernest L Sink
Jul 12, 2017·JBJS Reviews·Nicholas RamosThomas Youm
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Jun 11, 2019·The Journal of the American Academy of Orthopaedic Surgeons·T Sean LynchJ W Thomas Byrd
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Jun 2, 2017·The Bone & Joint Journal·J D Witt, F S Haddad
Jun 21, 2017·Journal of Hip Preservation Surgery·Nolan S HornerOlufemi R Ayeni

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