title: The Short-term Clinical Outcome of Total Hip Arthroplasty Using Short Metaphyseal Loading Femoral Stem.
abstract: OBJECTIVE
  The purpose of this study was to retrospectively evaluate the short-term clinical and radiological outcomes of total hip arthroplasty (THA) with short metaphyseal loading femoral stem.
  
  
  METHODS
  We retrospectively reviewed the records of 56 cases in 47 patients who had undergone THA with short metaphyseal loading femoral stem from April 2010 to December 2011. There were 20 males and 27 females. The mean age was 54 years (range, 26-77 years). The average follow up period was 4.6 years. Clinical results were evaluated by Harris hip scores (HHS) before the operation and at the last follow-up. Radiographic analysis was done by evaluating osteolysis, loosening, stress shielding, and alignement.
  
  
  RESULTS
  The mean HHS significantly improved from 45 (range, 15-58) preoperatively to 98 (range, 85-100) at the last follow-up. In radiographic analyses, there was no evidence of osteolysis or loosening around the stems and the acetabuluar components. All cases showed rounding off of the calcar, grade 1 bone resorption of the proximal femur. With regard to implant alignment, 51 femoral component (91.1%) were in neutral position, and 5 (8.9%) were in varus position. There was 1 intraoperative fracture treated by cerclage wiring and no case was revised during follow-up period.
  
  
  CONCLUSIONS
  Although longer follow-up is needed to confirm the durability of the short metaphyseal loading femoral stem, this short stem might provide stable fixation without diaphyseal fixation and demonstrated good clinical result at mean 4.6 year short term follow-up.
authors.affiliation: Department of Orthopaedic Surgery, Yonsei Sarang Hospital, Seoul, Korea.
authors.forename: Yoo Wang
authors.initials: YW
authors.lastname: Choi
authors.affiliation: Department of Orthopaedic Surgery, Daegu Catholic University Medical Center, Daegu, Korea.
authors.forename: Sung-Guk
authors.initials: SG
authors.lastname: Kim
keywords: Cementless; Hip; Short metaphyseal loading femoral stem; Total hip arthroplasty