title: Autologous Membrane Induced Chondrogenesis (AMIC) for the treatment of acetabular chondral defect.
abstract: BACKGROUND
  Acetabular chondral defect are very frequently associated to FAI. Treatment options are still questionable.
  
  
  METHODS
  Between 2008 and 2014, 201 patients over 583 have been arthroscopically treated with the AMIC procedure for grade III and/or IV acetabular chondral lesions. Patients age was between 18 and 50 years; acetabular chondral lesion size was between 2 and 4 cm2; radiological Tönnis degree of osteoarthritis was ≤ 2.
  
  
  RESULTS
  The mean follow up of the entire group of 201 patients was 5 years (from 8 to 2). Significant improvement, as measured by the mHHS, was observed at 6 months in comparison to preoperative levels (80.3 ± 8.3) (p<0.001). Continuous improvement with respect to each previous evaluation time point was seen, reaching the highest improvement level at the three year follow-up (85.5 ± 7.2). The mean mHHS improvement recorded at the five year follow-up compared with preoperative scores was 39.1 ± 5.9.
  
  
  CONCLUSIONS
  AMIC is a valid procedure to repair medium-sized chondral defects on the acetabular side of the hip found during treatment of FAI and lead to long-term favourable outcomes.
  
  
  METHODS
  IV.
authors.affiliation: Orthopaedic Unit, COF Lanzo Hospital, Ramponio Verna (CO), Italy.
authors.forename: Andrea
authors.initials: A
authors.lastname: Fontana
keywords: AMIC (Autologous Membrane Induced Chondrogenesis); FAI (Femoro Acetabular Impingemet); hip arthroscopy; hip chondral defects