title: Cementless Total Hip Arthroplasty With a High Hip Center for Hartofilakidis Type B Developmental Dysplasia of the Hip: Results of Midterm Follow-Up.
abstract: Acetabular reconstruction in adults with Hartofilakidis type B developmental dysplasia of the hip is a major technical challenge. The purpose of this retrospective study was to evaluate hip function and radiographic outcomes regarding high hip center at midterm follow-up.
  
  
  
  From January 1, 2007 to December 31, 2009, 37 patients who had Hartofilakidis type B developmental dysplasia of the hip underwent a primary total hip arthroplasty using a high hip center technique. Functional, radiographic, and survivorship outcomes were evaluated.
  
  
  
  Of the 37 patients, 31 patients (83.8%) were available for the mean follow-up of 6.1 years (range, 1.5-7.6 years). Thirty-one cementless cups were located at an average vertical distance of 38.1 ± 3.3 mm and at a mean horizontal distance of 35.5 ± 3.4 mm. The mean ratio of the height of the hip center was 2.4% (range, 2.0%-2.9%). The Harris Hip Scores were improved from 50.3 points (range, 38-63 points) preoperatively to 92.3 points (range, 85-100 points) at the final follow-up (P < .001). Four patients continued to present with Trendelenburg gait pattern at the last follow-up. With use of revision for any reason and aseptic loosening as the end point, the 5-year survival rates were 90.3% (95% CI, 79.9%-100%) and 93.3% (95% CI, 84.3%-100%), respectively.
  
  
  
  The high hip center technique in conjunction with a cementless acetabular component seems to be a valuable alternative to achieve satisfactory midterm outcomes for Hartofilakidis type B developmental dysplasia of the hip.
authors.affiliation: Department of Orthopaedics, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui Province, China.
authors.forename: Min
authors.initials: M
authors.lastname: Chen
authors.affiliation: Department of Orthopaedics, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui Province, China.
authors.forename: Zheng-Liang
authors.initials: ZL
authors.lastname: Luo
authors.affiliation: Department of Orthopaedics, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui Province, China.
authors.forename: Ke-Rong
authors.initials: KR
authors.lastname: Wu
authors.affiliation: Department of Orthopaedics, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui Province, China.
authors.forename: Xiao-Qi
authors.initials: XQ
authors.lastname: Zhang
authors.affiliation: Department of Orthopaedics, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui Province, China.
authors.forename: Xiao-Dong
authors.initials: XD
authors.lastname: Ling
authors.affiliation: Department of Orthopaedics, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui Province, China.
authors.forename: Xi-Fu
authors.initials: XF
authors.lastname: Shang
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging / Q000601:surgery; D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D001843:Bone Cements; D005260:Female; D005500:Follow-Up Studies; D006618:Hip Dislocation, Congenital / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011475:Prosthesis Failure; D020127:Recovery of Function; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D001843:Bone Cements
keywords: Hartofilakidis type B; cementless; high hip center; hip dysplasia; total hip arthroplasty