title: Femoral neck osteotomy guide for total hip arthroplasty.
abstract: BACKGROUND
  Total hip arthroplasty (THA) is a common last-resort treatment for hip disease, but postoperative patients often complain of discrepancies in leg length. This study introduces a device designed to increase the precision of the femoral neck osteotomy and reduce the incidence of leg length discrepancy.
  
  
  METHODS
  Forty-eight patients undergoing THA were divided into two groups, with and without the use of the femoral osteotomy guide. All operations were performed through a posterolateral approach. Differences in leg length were recorded before and after the operation. Measurements were also made to compare the preoperative plan with the actual amount of bone removed.
  
  
  RESULTS
  The mean average difference in femoral neck resection height was 0.84 mm when using the osteotomy guide and 1.69 mm without the guide. Discrepancies in postoperative leg length were 5.45 mm and 13.37 mm in the groups with and without the guide, respectively.
  
  
  CONCLUSIONS
  The femoral neck osteotomy guide is an effectively auxiliary tool for increasing the accuracy of bone resection in arthroplasty using the posterolateral approach.
  
  
  BACKGROUND
  ChiCTR-OOC-15005904 ; date: 2015-01-30.
authors.affiliation: Department of Orthopaedic Surgery and Key Biomechanical Laboratory of Orthopaedics of Hebei Province, The Third Hospital of Hebei Medical University, Shijiazhuang, 050051, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Yang
authors.affiliation: Department of Orthopaedic Surgery and Key Biomechanical Laboratory of Orthopaedics of Hebei Province, The Third Hospital of Hebei Medical University, Shijiazhuang, 050051, China.
authors.forename: Zhanle
authors.initials: Z
authors.lastname: Zheng
authors.affiliation: Department of Orthopaedic Surgery and Key Biomechanical Laboratory of Orthopaedics of Hebei Province, The Third Hospital of Hebei Medical University, Shijiazhuang, 050051, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.affiliation: Department of Orthopaedic Surgery and Key Biomechanical Laboratory of Orthopaedics of Hebei Province, The Third Hospital of Hebei Medical University, Shijiazhuang, 050051, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Orthopaedic Surgery and Key Biomechanical Laboratory of Orthopaedics of Hebei Province, The Third Hospital of Hebei Medical University, Shijiazhuang, 050051, China. dryzzhang@126.com.
authors.forename: Yingze
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005260:Female; D005272:Femur Neck / Q000601:surgery*; D006801:Humans; D007870:Leg Length Inequality / Q000209:etiology / Q000517:prevention & control*; D008297:Male; D008875:Middle Aged; D010027:Osteotomy; D011183:Postoperative Complications / Q000517:prevention & control*; D016037:Single-Blind Method; D016896:Treatment Outcome