Summary Most extensive selection of Precut Fresh OCA Cores (OCA Cores). Further, OCA Cores provide a complete and viable osteochondral replacement without donor site morbidity. Proprietary processing methods shown to maintain 80% absolute cartilage viability. Biological Materials Hyaline cartilage matrix Underlying subchondral bone Indications Indications knee osteochondritis dissecans lesions focal chondral / osteochondral defects failed prior cartilage repair procedures shoulder symptomatic focal osteochondral defects humeral head foot symptomatic focal osteochondral defects of first metatarsal head lesser metatarsal heads midfoot articular surfaces ankle symptomatic osteochondral lesions of the talus large or cystic talar dome lesions elbow symptomatic osteochondral defects of the capitellum osteochondritis dissecans of the capitellum Contraindications advanced or diffuse osteoarthritis bipolar cartilage lesions inflammatory arthritis active joint or systemic infection inability to comply with postoperative rehabilitation or weight-bearing restrictions Anatomy Osteology distal femur (medial/lateral condyles) trochlea patella tibial plateaus Cartilage femoral condyle trochlear groove patellar surface Muscles quadriceps mechanism (patellofemoral tracking) hamstrings Ligaments ACL/PCL MCL/LCL Nerves saphenous common peroneal Blood supply subchondral periosteal genicular Preoperative Planning Imaging MRI Preparation prepare the length of The Core to match the depth of the harvested site load The Core in clear plastic sleeve face the cartilage side of The Core up or away from the beveled end of the plastic sleeve with the core extruder knob handle fully retracted, slide the plastic sleeve with The Core onto the blue handled donor harvester device widest side first to insert The Core into the donor harvester ensure The Core lines up with the chamber of the blue handled harvester device gently seat The Core into the harvester once The Core is securely inserted into the harvester device place the beveled end of the plastic sleeve in the recipient site deploy white extruder knob to fully seat The Core into place Approach Technique Technical specifications Sizes 10 mm 12 mm 16 mm 20 mm Pearls & Pitfalls Pearls store and handle grafts according to JRF Ortho specifications to preserve chondrocyte viability best outcomes occur in patients with focal, contained defects and minimal surrounding degenerative change match graft diameter and depth precisely to ensure flush articular congruity and optimal load distribution. Pitfalls failure to correct malalignment, instability, or meniscal loss leads to graft overload advanced osteoarthritis or bipolar lesions are poor indications and increase failure risk premature weight-bearing or high-impact activity increases risk of graft failure