title: Mid-term result of ceramic bearings in total hip arthroplasty.
abstract: OBJECTIVE
  The purpose of this study was to evaluate our clinical experience with ceramic-on-ceramic cementless total hip arthroplasty (THA) and complications after an average follow-up of more than eight years.
  
  
  METHODS
  From January 2001 to December 2008, 540 THA with ceramic-on-ceramic bearings were performed in 448 patients (92 bilateral, 54 of which were operated simultaneously) with a mean age 49.9 years (range 18-84) by a senior surgeon. Pre-operative aetiological reasons were developmental dysplasia of the hip (DDH) in 205 hips, degenerative arthritis in 157 hips, avascular necrosis in 51 hips, rheumatoid diseases in 40 hips, posttraumatic arthritis in 40 hips, other reasons in 25 hips and revision surgery in 22 hips. Patients were evaluated with Harris hip score (HSS), and radiological findings of acetabular and femoral component loosening or osteolysis with ceramic bearing related complications like squeaking, liner and head fractures were recorded.
  
  
  RESULTS
  The average duration of follow-up time was 8.2 years (range, five to 13.2). The main Harris hip score increased from 42.4 points preoperatively to 94.9 points at the time of last follow-up. We had one fracture of the ceramic head, 11 clicking and four squeaking; one of them was revised because of terrible squeaking due to acetabular liner fracture, the other three were seldom audible from the outside and followed conservatively. We did not observed loosening or osteolysis due to ceramic bearings at the time of the final follow-up.
  
  
  CONCLUSIONS
  Our study has demonstrated that ceramic-on-ceramic bearings can be used safely in different etiological problems. Incidences of noisy hips are becoming less frequent.
authors.affiliation: Department of Orthopedics and Traumatology, Acibadem Medical Faculty, Acibadem Maslak Hospital, Maslak, Istanbul, Turkey, 34457, rtozun@gmail.com.
authors.forename: Ismail Remzi
authors.initials: IR
authors.lastname: Tozun
authors.forename: Vahit Emre
authors.initials: VE
authors.lastname: Ozden
authors.forename: Goksel
authors.initials: G
authors.lastname: Dikmen
authors.forename: Burak
authors.initials: B
authors.lastname: Beksac
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000295:instrumentation*; D001672:Biocompatible Materials; D002516:Ceramics; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000601:surgery*; D006622:Hip Prosthesis / Q000009:adverse effects; D006801:Humans; D007592:Joint Diseases / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D001672:Biocompatible Materials