title: Osteodensitometry after total hip replacement with uncemented taper-design stem.
abstract: We followed 24 patients (26 hips) with uncemented total hip replacement for a minimum of 3 years. Patient mean age was 52 (40-69) years. The aim was to evaluate femoral periprosthetic bone mineral density (BMD) using quantitative computed tomography osteodensitometry. At 3-years' follow-up, 25 hips were clinically rated good or excellent. The mean Harris hip score rose from 58 (49-68) pre-operatively to 94 (81-98) at the last follow-up. All hips were radiologically stable. Mean decrease of the overall BMD in the femoral metaphysis was 14.3%, and mean decrease of cortical BMD was 17.3%. In the diaphysis, mean decrease of overall BMD was 5.5% and mean decrease of cortical BMD was 4.5%. Observed loss was markedly lower than in comparable series with uncemented stems.
authors.affiliation: Department of Orthopaedic Surgery, University of Erlangen-Nuremberg, Nuremberg, Germany.
authors.forename: Rainer
authors.initials: R
authors.lastname: Schmidt
authors.forename: Tobias E
authors.initials: TE
authors.lastname: Nowak
authors.forename: Lutz
authors.initials: L
authors.lastname: Mueller
authors.forename: Rocco P
authors.initials: RP
authors.lastname: Pitto
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D015519:Bone Density; D016723:Bone Remodeling / Q000502:physiology*; D005260:Female; D005269:Femur; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome