title: Mid-term results of revision total hip arthroplasty using the oval-shaped uncemented Trč-Cingr cup.
abstract: OBJECTIVE
  The aim of the present study was to introduce a novel oblong revision cup type TC for use in revision total hip arthroplasty (THA), and to evaluate mid-term results in terms of bone tissue remodelling in the immediate area of the implant.
  
  
  METHODS
  The results of 31 patients that underwent revision THA between 2004 and 2008 are presented. The mean follow-up interval was 7.1 years (range 5.3-9.3 years, minimum of five years following revision). Osteointegration of the implant and bone tissue remodelling around the implant and ribs were assessed by X-ray and computed tomography (CT).
  
  
  RESULTS
  The average Harris hip score increased from 39.8 to 85.3. Excellent results were achieved in nine patients, good in 16, fair in three and poor in three. According to X-ray results, 25 hips had a well-fixed, bone-ingrown cup and five had a stable fibrous union in the middle and the distal third of the implant. Proximal migration of the cup was noted in one case. Pelvic CT was additionally performed in ten patients. In all cases, we detected bone remodelling in the space between the implant ribs. Kaplan-Maier survivorship of the acetabular components was 94.2 % at 7.1 years.
  
  
  CONCLUSIONS
  Our results show that the novel oblong revision cup type TC is relatively simple to implant, and is associated with reliable primary fixation and documented osteointegration and bone remodelling in the immediate area.
authors.affiliation: Department of Paediatric and Adult Orthopaedic Surgery and Traumatology, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, V Úvalu 84, Prague 5, 154 00, Czech Republic, stastnyed@seznam.cz.
authors.forename: Eduard
authors.initials: E
authors.lastname: Šťastný
authors.forename: Tomáš
authors.initials: T
authors.lastname: Trč
authors.forename: Milan
authors.initials: M
authors.lastname: Handl
authors.forename: Petr
authors.initials: P
authors.lastname: Kos
authors.forename: Jakub
authors.initials: J
authors.lastname: Kautzner
authors.forename: Theodoros
authors.initials: T
authors.lastname: Philippou
authors.forename: Jiří
authors.initials: J
authors.lastname: Lisý
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D012086:Reoperation; D013997:Time Factors; D016896:Treatment Outcome