title: Femoral component revision using an extensively hydroxyapatite-coated stem.
abstract: Femoral component revisions with extensively coated stems have shown promising clinical results, although concerns over stress shielding still exist. We retrospectively reviewed 59 patients undergoing femoral component revision with an extensively hydroxyapatite (HA)-coated stem. The average length of follow-up was 3.3 years (range, 2-5 years). The average preoperative Harris Hip Score was 43 points, which improved to 86 points at the latest follow-up (P < .01). The overall mechanical failure rate was 2%. No evidence of stress shielding was seen in 78% of patients. The clinical results of this series using an extensively HA-coated stem are similar to those using an extensively porous-coated stem. Long-term follow-up is required to determine if an extensively HA-coated implant will be superior to an extensively porous-coated implant with regard to stress shielding.
authors.affiliation: University of Louisville School of Medicnine, Kentucky 40292, USA.
authors.forename: Charles H
authors.initials: CH
authors.lastname: Crawford
authors.forename: Charles H
authors.initials: CH
authors.lastname: Crawford
authors.forename: Arthur L
authors.initials: AL
authors.lastname: Malkani
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Incavo
authors.forename: Hugh B
authors.initials: HB
authors.lastname: Morris
authors.forename: Ryan J
authors.initials: RJ
authors.lastname: Krupp
authors.forename: Dale
authors.initials: D
authors.lastname: Baker
mesh_terms: D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D017886:Durapatite; D005260:Female; D005269:Femur; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation; D013314:Stress, Mechanical; D013997:Time Factors
chemical_list: D017886:Durapatite