title: Subtrochanteric Fracture following Removal of a Porous Tantalum Implant.
abstract: Osteonecrosis of the hip accounts for about 10% of all total hip arthroplasty cases and presents a significant challenge for those patients with and without femoral head collapse. Subtrochanteric femur fractures have been reported with numerous types of proximal femoral implants. Care must be taken to avoid penetrating the lateral cortex of the proximal femur inferior to the distal border of the lesser trochanter. Core decompression requires a 3 mm to 20 mm defect in the lateral femoral cortex. Subtrochanteric femur fractures are a well-known complication of core decompression as well. We present a case of a subtrochanteric fracture following the removal of a porous tantalum implant.
authors.affiliation: Mayo Clinic, Department of Orthopaedic Surgery, 200 First Street SW, Gonda 14, Rochester, MN 55905, USA.
authors.forename: Derek F
authors.initials: DF
authors.lastname: Amanatullah
authors.affiliation: Pacific Orthopaedic Associates, 707 South Garfield Avenue, 2nd Floor, Alhambra, CA 91801, USA.
authors.forename: Randall
authors.initials: R
authors.lastname: Farac
authors.affiliation: Sierra Orthopaedic Institute, 860 Guzzi Lane, Suite 105, Sonora, CA 95370, USA.
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: McDonald
authors.affiliation: University of California Davis Medical Center, Department of Orthopaedic Surgery, 4860 Y Street, Suite 3800, Sacramento, CA 95817, USA.
authors.forename: H David
authors.initials: HD
authors.lastname: Moehring
authors.affiliation: New York Hospital Queens, 56-45 Main Street, 4th Floor South, Flushing, NY 11355, USA.
authors.forename: Paul E
authors.initials: PE
authors.lastname: Di Cesare