title: Lower Dislocation Rate Following Total Hip Arthroplasty via Direct Anterior Approach than via Posterior Approach: Five-Year-Average Follow-Up Results.
abstract: OBJECTIVE
  The aim of the study was to compare the dislocation rate between total hip arthroplasty (THA) via direct anterior approach (DAA) and via posterior approach (PA).
  
  
  METHODS
  We compared a consecutive series of 139 THAs via DAA with 177 THAs via PA. All study patients received ceramic-on-ceramic bearing surfaces and similar uncemented prostheses. Dislocation-free survival after THA was estimated using the Kaplan-Meier survival method and compared between groups using the log-rank test.
  
  
  RESULTS
  In the DAA group, none of 139 hips experienced dislocations in five-year-average follow-up. In the PA group, seven hips experienced dislocations among 177 hips (4 %). The dislocation was significantly less in the DAA group compared to the PA group (p = 0.033).
  
  
  CONCLUSIONS
  The dislocation rate of THA via DAA was significantly less than that of THA via PA.
authors.affiliation: Department of Orthopaedic Surgery, Nekoyama Miyao Hospital, 14-7 Konan, Chuo-ku, Niigata, Niigata, 950-1151, Japan.
authors.forename: Sachiyuki
authors.initials: S
authors.lastname: Tsukada
authors.affiliation: Department of Orthopaedic Surgery, Nekoyama Miyao Hospital, 14-7 Konan, Chuo-ku, Niigata, Niigata, 950-1151, Japan.
authors.forename: Motohiro
authors.initials: M
authors.lastname: Wakui
keywords: Heuter; Smith-Peterson; instability; intermuscular; minimally invasive; muscle-sparing; total hip arthroplasty