The Manangement of Knee Cartilage Defects with Modified Amic Technique: Preliminary Results

Abstract

Cartilage defects represent a common problem in orthopaedic practice. The knee is frequently involved and the medial femoral condyle is the most common localization. Predisposing factors are: traumas, inflammatory conditions and biomechanics alterations. Several surgical options are available once correct diagnosis is given and accurate patient evaluation has been performed. The aim of our study was to prospectively evaluate functional results of modified autologous matrix induced chondrogenesis (AMIC) technique in a population of patients affected by focal cartilage defects A population of 17 patients was enrolled in this study. 10 patients were male, mean age at the time of surgery was 39 years, right side was involved in 11 cases. All patients were evaluated with accurate physical exam and complete imaging study. At an average FU of 36 months, mean IKDC score and Lysholm score improved from 32 to 82 and from 38 to 74. 13 patients out of 17 (76.5%) were satisfied or extremely satisfied with their functional result. MRI control showed reduction of the defect area and subchondral oedema in 10 cases (58.8%). AMIC technique is a relatively new option in the treatment of full thickness cartilage lesions. It enhances the advantages of microfractures since the Chondrogide membrane protects and stabilizes the blood plug acting as a matrix for new cartilage formation. First reports on AMIC technique, show comparable results to autologous chondrocyte implantation (ACI) with the advantage of a single stage technique and no donor site morbidity. AMIC technique represents a new option in the treatment of full thickness cartilage defect. It is safe and reliable. Our data are in accordance with previously reported series in literature and confirm the good objective and subjective results of this procedure.