title: Extensively coated femoral components in revision hip arthroplasty: follow-up study of 23 patients.
abstract: OBJECTIVE
  To review the outcome of revision hip arthroplasty using extensively coated femoral components.
  
  
  METHODS
  We reviewed the results of revision involving 24 extensively porous-coated cementless femoral components in 23 patients, whose mean age was 52.4 years (range, 28.0-79.0 years). Most revisions were performed for aseptic loosening of the previously cemented femoral component. All patients were followed up for a minimum period of 24.0 months (mean, 61.1 months).
  
  
  RESULTS
  Of the 24 femoral stems, 20 showed bone ingrowth, 3 showed stable fibrous ingrowth, and one was unstable because of deep infection. Intra-operative anterior femoral diaphyseal perforation occurred in 2 hips during the insertion of straight femoral components of 200 mm. Postoperative radiographs displayed marked cortical erosion in 3 other hips and cortical perforation in one.
  
  
  CONCLUSIONS
  The results from the use of extensively coated femoral components were promising. Nevertheless, anterior cortical perforations were also common, which may be related to more bowing of the femora among the Chinese patients. Caution must be exercised when inserting a long, straight, extensively coated femoral component.
authors.affiliation: Division of Joint Replacement Surgery, Department of Orthopaedics and Traumatology, The University of Hong Kong, Queen Mary Hospital, Hong Kong.
authors.forename: F Y
authors.initials: FY
authors.lastname: Ng
authors.forename: K Y
authors.initials: KY
authors.lastname: Chiu
authors.forename: W P
authors.initials: WP
authors.lastname: Yau
authors.forename: T P
authors.initials: TP
authors.lastname: Ng
authors.forename: W M
authors.initials: WM
authors.lastname: Tang
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D020099:Coated Materials, Biocompatible; D005260:Female; D005269:Femur; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation; D016896:Treatment Outcome
chemical_list: D020099:Coated Materials, Biocompatible