title: Nickel-Titanium Shape-Memory Sawtooth-Arm Embracing Clamp for Complex Femoral Revision Hip Arthroplasty.
abstract: OBJECTIVE
  To examine the clinical outcomes of patients treated with a nickel-titanium shape-memory sawtooth-arm embracing clamp (Ni-Ti SSEC) in complex femoral revision surgery.
  
  
  METHODS
  We retrospectively evaluated the outcomes for 21 complex femoral revision hip arthroplasties that we treated using an Ni-Ti SSEC. The Ni-Ti SSEC was used for various procedures, including the fixation of extremely long cortical windows (11 patients), femoral shaft osteotomy (4 patients), an extended trochanteric osteotomy (3 patients), and protection of a penetrated femoral cortex by a primary stem (3 patients). All patients received follow-up care for an average of 48.2 months.
  
  
  RESULTS
  The mean time of Ni-Ti SSEC insertion intraoperatively was 6 minutes. The mean Harris Hip Score improved from 21.2 points before revision surgery to 83.1 points at the most recent examination. No implant failures or malunions occurred. Dislocation and deep infection occurred in 1 case during the follow-up period.
  
  
  CONCLUSIONS
  Our results show that the embracing clamp is a simple and valid method for fixing osteotomies in treating complex femoral revision surgery.
authors.affiliation: Department of Orthopaedics, Shanghai No. 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China.
authors.forename: Huiwu
authors.initials: H
authors.lastname: Li
authors.affiliation: Department of Orthopaedics, Shanghai No. 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China.
authors.forename: Yuanqing
authors.initials: Y
authors.lastname: Mao
authors.affiliation: Department of Orthopaedics, Shanghai No. 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China.
authors.forename: Xinhua
authors.initials: X
authors.lastname: Qu
authors.affiliation: Department of Orthopaedics, Shanghai No. 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China.
authors.forename: Xin
authors.initials: X
authors.lastname: Zhao
authors.affiliation: Department of Orthopaedics, Shanghai No. 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China.
authors.forename: Kerong
authors.initials: K
authors.lastname: Dai
authors.affiliation: Department of Orthopaedics, Shanghai No. 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China.
authors.forename: Zhenan
authors.initials: Z
authors.lastname: Zhu
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation* / Q000379:methods; D001672:Biocompatible Materials; D005260:Female; D005269:Femur / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D009532:Nickel; D010027:Osteotomy / Q000295:instrumentation; D011474:Prosthesis Design; D012086:Reoperation; D012189:Retrospective Studies; D014025:Titanium; D055815:Young Adult
chemical_list: D001672:Biocompatible Materials; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium
keywords: embracing clamp; femoral revision surgery; modular taper stem; nickel-titanium shape-memory; total hip arthroplasty