title: Matrix-based autologous chondrocyte implantation for cartilage repair with HyalograftC: two-year follow-up by magnetic resonance imaging.
abstract: OBJECTIVE
  Monitoring of articular cartilage repair after matrix-associated autologous chondrocyte implantation with HyalograftC by a new grading system based on non-invasive high-resolution magnetic resonance imaging.
  
  
  METHODS
  In 23 patients, postoperative magnetic resonance imaging (MRI) was performed between 76 and 120 weeks. In nine of these patients, five MRI examinations were performed at 4, 12, 24, 52 and 104 weeks after HyalograftC implant. The repair tissue was described with separate variables: degree of defect repair in width and length, signal intensity of the repair tissue and status of the subchondral bone. For these variables a grading system with point scale evaluation was applied.
  
  
  RESULTS
  
  
  
  CONCLUSIONS
  High-resolution MRI provides a non-invasive tool for monitoring the development of cartilage repair tissue following HyalograftC technology, shows a good correlation with clinical outcome and may help to differentiate abnormal repair tissue from a normal maturation process.
authors.affiliation: Department of Radiology, University Hospital of Vienna, Medical University of Vienna, Austria. siegfried.trattnig@meduniwien.ac.at
authors.forename: S
authors.initials: S
authors.lastname: Trattnig
authors.forename: K
authors.initials: K
authors.lastname: Pinker
authors.forename: C
authors.initials: C
authors.lastname: Krestan
authors.forename: C
authors.initials: C
authors.lastname: Plank
authors.forename: S
authors.initials: S
authors.lastname: Millington
authors.forename: S
authors.initials: S
authors.lastname: Marlovits
mesh_terms: D000328:Adult; D002358:Cartilage, Articular / Q000293:injuries* / Q000601:surgery*; D019902:Chondrocytes / Q000637:transplantation*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006820:Hyaluronic Acid / Q000627:therapeutic use*; D007718:Knee Injuries / Q000534:rehabilitation / Q000601:surgery*; D008279:Magnetic Resonance Imaging; D008297:Male; D019736:Prostheses and Implants; D023822:Tissue Engineering; D014182:Transplantation, Autologous; D016896:Treatment Outcome
chemical_list: D006820:Hyaluronic Acid