title: The Early Result of Cementless Arthroplasty for Femur Neck Fracture in Elderly Patients with Severe Osteoporosis.
abstract: OBJECTIVE
  The purposes of the current study were to assess the early results of cementless hip arthroplasty (HA) for femoral neck fractures in elderly patients with severe osteoporosis and to compare the clinical outcomes between those who underwent total HA (THA) or bipolar hemiarthroplasty (BHA).
  
  
  METHODS
  From April 2011 to May 2012, we performed 87 cementless HAs for displaced femoral neck fractures in elderly patients (≥65 years) with severe osteoporosis. Among them, we studied 70 hips that were able to be followed-up for >24 months. Of these, 34 underwent THA and 36 underwent BHA. Clinical results were evaluated using the Harris hip score (HHS), Koval classification, and radiographs.
  
  
  RESULTS
  Only one instance of femoral stem loosening was observed. Additionally, no dislocations were observed and no revision surgeries were required. The mean changes in the functional items of the HHS scores were 2.8 and 5.2 for those who underwent THA and BHA, respectively (P<0.05). According to the Koval classification used for the ambulatory status analysis, the mean perioperative change in the grade was 0.8 (0-4), with no significant differences noted between the THA and BHA groups.
  
  
  CONCLUSIONS
  The early results of cementless HA for femur neck fractures in elderly patients with osteoporosis were satisfactory, and THA was found to have a functional advantage over BHA.
authors.affiliation: Department of Orthopedic Surgery, Seoul Medical Center, Seoul, Korea.
authors.forename: Jae-Seong
authors.initials: JS
authors.lastname: Seo
authors.affiliation: Department of Orthopedic Surgery, Seoul Medical Center, Seoul, Korea.
authors.forename: Seong-Kee
authors.initials: SK
authors.lastname: Shin
authors.affiliation: Department of Orthopedic Surgery, Seoul Medical Center, Seoul, Korea.
authors.forename: Sung-Han
authors.initials: SH
authors.lastname: Jun
authors.affiliation: Department of Orthopedic Surgery, Seoul Medical Center, Seoul, Korea.
authors.forename: Chang-Ho
authors.initials: CH
authors.lastname: Cho
authors.affiliation: Department of Orthopedic Surgery, Seoul Medical Center, Seoul, Korea.
authors.forename: Byung Ho
authors.initials: BH
authors.lastname: Lim
keywords: Cementless arthroplasty; Elderly; Femur neck fractures; Osteoporosis