title: [Eight-year follow-up of uncemented hydroxyapatite coated hip prosthesis for hip osteoarthritis secondary to developmental hip dysplasia].
abstract: OBJECTIVE
  This study aims to investigate the mid-term clinical and radiological results of cementless hydroxyapatite coated total hip arthroplasty (THA) for hip osteoarthritis due to developmental dysplasia of the hip (DDH).
  
  
  METHODS
  Between January 2004 and December 2010, 34 hips (12 Crowe type I, 12 Crowe type II, 4 Crowe type III, 6 Crowe type IV) of 30 patients (22 females, 8 males; mean age 53.4 years; range 30 to 75 years) with degenerative arthritis due to DDH were analyzed in terms of cementless hydroxyapatite coated acetabular component (EPF Plus(®)) over Zweymüller femoral component (Zweymüller SL-PLUS(®)) and porous coating. Clinical assessment was performed using Harris hip scores (HHS) preoperatively and at the last clinic visit, while radiological assessment was done according to the Callaghan and Engh's criteria.
  
  
  RESULTS
  The mean follow-up was 48 months (range, 25-91 months). The mean HHS was 44.97 (28-55) preoperatively and 92.25 (69-100) at the last visit. All femoral components were graded as stable according to Callaghan and Engh's criteria. Radiolucency was mostly observed in Gruen zones 1 and zone 7 of the femur [zone 1; 20 hips zone 7; 19 hips zone 2; one hip, zone 3; one hip and zone 6 one hip]. Around acetabular component, radiolucency was detected in zone 2 in 12 hips, zone 3 in 10 hips and zone 1 in six hips. Heterotopic ossification developed in two hips, while neuropraxy was detected in two hips postoperatively. Femoral fissure in one hip, nonunion in the femoral osteotomy line in one hip, and femoral head autograft nonunion in one hip developed.
  
  
  CONCLUSIONS
  Mid-term results of uncemented Zweymüller femoral stem and hydroxyapatite coated press-fit using acetabular components for THA femoral stem are excellent.
authors.affiliation: Kazan Devlet Hastanesi Ortopedi ve Travmatoloji Kliniği, Ankara, Türkiye. drbaran80@hotmail.com
authors.forename: Baran
authors.initials: B
authors.lastname: Sarıkaya
authors.forename: Baybars
authors.initials: B
authors.lastname: Ataoğlu
authors.forename: Gökay
authors.initials: G
authors.lastname: Görmeli
authors.forename: Burak Yağmur
authors.initials: BY
authors.lastname: Öztürk
authors.forename: Sacit
authors.initials: S
authors.lastname: Turanlı
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D001672:Biocompatible Materials; D017886:Durapatite; D005260:Female; D005500:Follow-Up Studies; D006618:Hip Dislocation, Congenital / Q000150:complications / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000150:complications / Q000601:surgery*; D010027:Osteotomy; D011183:Postoperative Complications; D011474:Prosthesis Design; D016896:Treatment Outcome
chemical_list: D001672:Biocompatible Materials; D017886:Durapatite