title: The effect of component position on clinical outcomes in resurfacing hip arthroplasty.
abstract: OBJECTIVE
  The aim of this study was to evaluate the relationship between component position and clinical results in resurfacing hip arthroplasty.
  
  
  METHODS
  Resurfacing hip arthroplasty was performed on 41 hips of 38 patients (22 male, 16 female; mean age: 53.7 years; mean follow-up time: 20.1 ± 5.8 months). The femoral and acetabular component orientation angles in the coronal plane were evaluated on anteroposterior radiographs. Harris and Oxford hip scores were used in the clinical evaluation.
  
  
  RESULTS
  The mean angle between the collum and diaphysis was 139.5 ± 8.8 degrees. In 22 hips, the femoral component angle between collum and diaphysis was less than 5 degrees valgus position when compared with the same anatomical femur angle. In the other 19 hips, the femoral component angle was greater than 5 degrees valgus position. The mean inclination angle of the acetabular component was 46.1 ± 7 degrees. In 22 hips, the mean inclination angle of the acetabular components was 45 degrees or less. There was no significant difference in the clinical outcomes between patients with femoral component angles of greater than 5 degrees valgus position and those with angles of less than 5 degrees valgus position (p>0.05). There was also no significant difference between the clinical results of patients with an acetabular inclination of 45 degrees or less and those with an acetabular inclination exceeding 45 degrees (p>0.05).
  
  
  CONCLUSIONS
  The orientation of femoral and acetabular components in the coronal plane does not appear to have an effect on clinical outcomes in resurfacing hip arthroplasty.
authors.affiliation: 3rd Department of Orthopedics and Traumatology, Metin Sabancı Baltalimanı Bone Diseases Training and Research Hospital, İstanbul, Turkey. ozkorkmaz00@yahoo.com
authors.forename: Ozgür
authors.initials: O
authors.lastname: Korkmaz
authors.forename: F Safa
authors.initials: FS
authors.lastname: Bozkuş
authors.forename: Umit Selçuk
authors.initials: US
authors.lastname: Aykut
authors.forename: H Cinar
authors.initials: HC
authors.lastname: Caki
authors.forename: Mehmet Akif
authors.initials: MA
authors.lastname: Kaygusuz
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005260:Female; D005270:Femur Head / Q000000981:diagnostic imaging* / Q000601:surgery*; D005500:Follow-Up Studies; D006615:Hip / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011859:Radiography; D016059:Range of Motion, Articular; D015203:Reproducibility of Results; D012189:Retrospective Studies; D018570:Risk Assessment; D025321:Surgery, Computer-Assisted / Q000379:methods; D016896:Treatment Outcome; D055815:Young Adult