title: Preservation of bone mineral density of the proximal femur following hemisurface arthroplasty.
abstract: Bone mineral density of the proximal femur was measured in six patients who underwent hemisurface replacement for osteonecrosis of the femoral head. Bone mineral density values in operated and contralateral nonoperated hips were compared. In four patients who had sequential examinations, bone mineral density was compared over time. Average patient age was 34.6 years, average follow-up was 9.1 years, and mean follow-up of bone mineral density measurements was 6.6 years. Average bone mineral density variation was 0.0048 to -0.0264 g/cm2 per year in all five regions in nonoperated hips and -0.012 to -0.0300 g/cm2 in operated hips. These results support bone conservation and preservation with hemiresurfacing arthroplasty in young patients with osteonecrosis of the femoral head.
authors.affiliation: Joint Replacement Institute, J. Vernon Luck, Sr Center for Orthopaedic Research, Los Angeles Orthopaedic Hospital, UCLA, 2400 S Flower St, Los Angeles, CA 90007-2697, USA.
authors.forename: Harlan C
authors.initials: HC
authors.lastname: Amstutz
authors.forename: Edward
authors.initials: E
authors.lastname: Ebramzadeh
authors.forename: Akos
authors.initials: A
authors.lastname: Sarkany
authors.forename: Michel
authors.initials: M
authors.lastname: Le Duff
authors.forename: Robert
authors.initials: R
authors.lastname: Rude
mesh_terms: D000293:Adolescent; D000328:Adult; D019644:Arthroplasty, Replacement, Hip; D015519:Bone Density; D016723:Bone Remodeling; D005269:Femur / Q000503:physiopathology*; D005270:Femur Head / Q000503:physiopathology; D005271:Femur Head Necrosis / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D008875:Middle Aged; D011184:Postoperative Period; D011475:Prosthesis Failure; D011859:Radiography