title: Three to seven year follow-up of a tapered modular femoral prosthesis in revision total hip arthroplasty.
abstract: OBJECTIVE
  Modular femoral prostheses can provide independent distal fixation and intraoperative flexibility and are being used increasingly, especially in patients with proximal femoral bone defects. This retrospective clinical study evaluated whether modular prostheses were effective and reliable implants for femoral revision.
  
  
  METHODS
  This case series consisted of 58 patients who underwent hip revision with a tapered modular femoral prosthesis at our institution between 2004 and 2008. Mean patient age at surgery was 64 years (range 18-86 years). Femoral bone defects before revision surgery were evaluated using the Paprosky classification. All patients were followed for a minimum of 3 years (mean 4.3 years, range 3-7 years) with clinical and radiographic evaluation. Re-revisions and complications were also recorded.
  
  
  RESULTS
  Two stems required re-revision, one each for recurrent deep infection and periprosthetic fracture. At last follow-up, the Harris Hip Score and Visual Analog Pain Scores had improved significantly, the median radiographic stem migration was 1.6 mm, leg length discrepancy was corrected in 64 % of the patients and osseointegration occurred in 90 %. Complications included intraoperative fracture in 10 (17 %) patients and hip dislocation in 2 (3 %).
  
  
  CONCLUSIONS
  Modular femoral components can improve hip function, provide distal fixation, equalize leg length, and result in fewer complications when used to revise failed femoral components.
authors.affiliation: Department of Orthopaedics, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Changsha, Hunan, 410008, P. R. China.
authors.forename: Long
authors.initials: L
authors.lastname: Wang
authors.forename: Zixun
authors.initials: Z
authors.lastname: Dai
authors.forename: Ting
authors.initials: T
authors.lastname: Wen
authors.forename: Mingqing
authors.initials: M
authors.lastname: Li
authors.forename: Yihe
authors.initials: Y
authors.lastname: Hu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D005269:Femur / Q000601:surgery*; D005500:Follow-Up Studies; D006621:Hip Joint / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D007592:Joint Diseases / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011475:Prosthesis Failure; D012086:Reoperation; D012189:Retrospective Studies; D055815:Young Adult