title: Chronic instability of the anterior tibiofibular syndesmosis of the ankle. Arthroscopic findings and results of anatomical reconstruction.
abstract: BACKGROUND
  The arthroscopic findings in patients with chronic anterior syndesmotic instability that need reconstructive surgery have never been described extensively.
  
  
  METHODS
  In 12 patients the clinical suspicion of chronic instability of the syndesmosis was confirmed during arthroscopy of the ankle. All findings during the arthroscopy were scored. Anatomical reconstruction of the anterior tibiofibular syndesmosis was performed in all patients. The AOFAS score was assessed to evaluate the result of the reconstruction. At an average of 43 months after the reconstruction all patients were seen for follow-up.
  
  
  RESULTS
  The syndesmosis being easily accessible for the 3 mm transverse end of probe which could be rotated around its longitudinal axis in all cases during arthroscopy of the ankle joint, confirmed the diagnosis. Cartilage damage was seen in 8 ankles, of which in 7 patients the damage was situated at the medial side of the ankle joint. The intraarticular part of anterior tibiofibular ligament was visibly damaged in 5 patients. Synovitis was seen in all but one ankle joint. After surgical reconstruction the AOFAS score improved from an average of 72 pre-operatively to 92 post-operatively.
  
  
  CONCLUSIONS
  To confirm the clinical suspicion, the final diagnosis of chronic instability of the anterior syndesmosis can be made during arthroscopy of the ankle. Cartilage damage to the medial side of the tibiotalar joint is often seen and might be the result of syndesmotic instability. Good results are achieved by anatomic reconstruction of the anterior syndesmosis, and all patients in this study would undergo the surgery again if necessary.
authors.affiliation: Department of Orthopaedics, Sint Maartenskliniek, 6500GM Nijmegen, the Netherlands.
authors.forename: Marc L
authors.initials: ML
authors.lastname: Wagener
authors.forename: Annechien
authors.initials: A
authors.lastname: Beumer
authors.forename: Bart A
authors.initials: BA
authors.lastname: Swierstra
mesh_terms: D000293:Adolescent; D000328:Adult; D016512:Ankle Injuries / Q000473:pathology* / Q000503:physiopathology / Q000601:surgery; D000843:Ankle Joint / Q000473:pathology* / Q000503:physiopathology / Q000601:surgery; D001182:Arthroscopy / Q000379:methods*; D002908:Chronic Disease; D005260:Female; D005360:Fibula / Q000473:pathology; D006801:Humans; D007593:Joint Instability / Q000473:pathology* / Q000503:physiopathology / Q000601:surgery; D008023:Ligaments, Articular / Q000473:pathology* / Q000503:physiopathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D019651:Plastic Surgery Procedures / Q000379:methods*; D013585:Synovitis / Q000473:pathology / Q000601:surgery; D013977:Tibia / Q000473:pathology; D055815:Young Adult