title: Intermediate-term Results of Mobile-bearing Total Ankle Replacement.
abstract: BACKGROUND
  The literature analyzing total ankle replacement (TAR) results should be critically interpreted because studies made by the design surgeons are potentially subject to bias. European nondesigner surgeon studies reviewing the HINTEGRA TAR system are scarce in the literature. The present study is a European nondesigner surgeon study reviewing a consecutive series of 50 HINTEGRA TAR systems with a minimum follow-up of 2 years, focusing on clinical and radiographic outcomes.
  
  
  METHODS
  Fifty primary TAR procedures were performed between February 2008 and January 2012 by a single surgeon. Every patient underwent a standardized clinical and radiographic follow-up at 6 weeks, 3 and 6 months, and 1 year postoperatively and annually thereafter. The mean time to final follow-up was 45 months.
  
  
  RESULTS
  The mean American Orthopaedic Foot and Ankle Society (AOFAS) Ankle-Hindfoot Scale score significantly increased from 43.5 preoperatively to 83.8 postoperatively. Clinical range of motion of the ankle also improved from 23.3 degrees preoperatively to 28.3 degrees postoperatively. In 70% of the TAR procedures, the talar component was positioned anteriorly with respect to the tibial axis. Radiological evidence of osteolysis was identified in 24 ankles. The failure rate in the present series was 10%, which was defined as having major revision surgery within 4 years.
  
  
  CONCLUSIONS
  The survival of the first 50 HINTEGRA TAR systems in this series was satisfactory from clinical and radiological points of view. However, the incidence of asymptomatic periprosthetic osteolytic lesions was quite high (24 ankles).
  
  
  METHODS
  Level IV, retrospective case series.
authors.affiliation: Foot & Ankle Institute, Clinique du Parc Léopold, Brussels, Belgium Division of Podiatry, Institut D'Enseignement Supérieur Parnasse Deux-Alice, Brussels, Belgium pa.deleu@gmail.com.
authors.forename: Paul-André
authors.initials: PA
authors.lastname: Deleu
authors.affiliation: Foot & Ankle Institute, Clinique du Parc Léopold, Brussels, Belgium.
authors.forename: Bernhard
authors.initials: B
authors.lastname: Devos Bevernage
authors.affiliation: Foot & Ankle Institute, Clinique du Parc Léopold, Brussels, Belgium.
authors.forename: Vincent
authors.initials: V
authors.lastname: Gombault
authors.affiliation: Foot & Ankle Institute, Clinique du Parc Léopold, Brussels, Belgium.
authors.forename: Pierre
authors.initials: P
authors.lastname: Maldague
authors.affiliation: Foot & Ankle Institute, Clinique du Parc Léopold, Brussels, Belgium.
authors.forename: Thibaut
authors.initials: T
authors.lastname: Leemrijse
mesh_terms: D000328:Adult; D000368:Aged; D000843:Ankle Joint / Q000000981:diagnostic imaging / Q000473:pathology; D058737:Arthroplasty, Replacement, Ankle; D005260:Female; D006801:Humans; D007595:Joint Prosthesis; D008297:Male; D008875:Middle Aged; D009999:Ossification, Heterotopic / Q000000981:diagnostic imaging / Q000473:pathology; D010003:Osteoarthritis / Q000601:surgery; D010014:Osteolysis / Q000000981:diagnostic imaging / Q000453:epidemiology; D011474:Prosthesis Design; D011859:Radiography; D016896:Treatment Outcome; D016474:Weight-Bearing
keywords: TAR; periprosthetic osteolytic lesions; total ankle replacement