title: Ceramic on ceramic hip arthroplasty in fused hips.
abstract: BACKGROUND
  Most literature in the field of total hip arthroplasty (THA) for fused hips, until date has reported the results of using metal on polyethylene and ceramic on polyethylene bearings. Results of THA using ceramic on ceramic (CoC) bearings in fused hips have not been published in literature. This study reports the results of cementless THA using CoC articulation perfomed in fused hips.
  
  
  METHODS
  Twenty-three patients (25 hips) with fused hips underwent conversion to THA using CoC bearings and were followed up for a mean 5.4 years. The conventional posterolateral approach was used in 15 hips, a modified two incision technique in 7 hips and a direct lateral approach with greater trochanteric osteotomy in 3 hips. Postoperatively, range of motion exercises were encouraged after 2-3 days of bed rest and subsequent gradual weight bearing using crutches was begun.
  
  
  RESULTS
  Mean Harris hip score improved from 42.4 to 84.2 and mean leg lengthening of 36.6 mm was achieved. In the average 5.4 years (range 2.8-9.1 years) followup there were no cases with osteolysis around acetabular cup and femoral stem. In this study, there was no case of ceramic fracture. There was one case of squeaking.
  
  
  CONCLUSIONS
  This study suggests that cementless THA performed for fused hips with CoC bearings can provide good early clinical results.
authors.affiliation: Department of Orthopedic, Center for Joint Disease, Chonnam National University Hwasun Hospital, 160, Ilsim-Ri, Hwasun-Eup, Hwasun-Gun, Jeonnam, 519-809, Korea.
authors.forename: Kyung-Soon
authors.initials: KS
authors.lastname: Park
authors.affiliation: Department of Orthopedic, Center for Joint Disease, Chonnam National University Hwasun Hospital, 160, Ilsim-Ri, Hwasun-Eup, Hwasun-Gun, Jeonnam, 519-809, Korea.
authors.forename: Taek-Rim
authors.initials: TR
authors.lastname: Yoon
authors.affiliation: Department of Orthopedic, Center for Joint Disease, Chonnam National University Hwasun Hospital, 160, Ilsim-Ri, Hwasun-Eup, Hwasun-Gun, Jeonnam, 519-809, Korea.
authors.forename: Tae-Min
authors.initials: TM
authors.lastname: Lee
authors.affiliation: Department of Orthopedic, Center for Joint Disease, Chonnam National University Hwasun Hospital, 160, Ilsim-Ri, Hwasun-Eup, Hwasun-Gun, Jeonnam, 519-809, Korea.
authors.forename: Yeong-Seub
authors.initials: YS
authors.lastname: Ahn
keywords: Ceramic on ceramic; Hip; ankylosis; arthroplasty; bearing surfaces; cementless total hip arthroplasty; ceramics; fused hip; total hip arthroplasty