Fig. 3.

Osteochondral defect intra-operative bleeding, hematoma formation and transient post-operative knee effusion had minor effects compared to scaffold on macroscopic appearance of 6 week repair tissues. Panels show variable bleeding in drill holes (a-b) before and after implanting the scaffolds, (c) hematoma formation at day 1, and (d) cumulative post-operative knee effusion scores and representative macroscopic appearance of repair tissues for (e) 83-99-PCL, (d) 99-PCL, (g) PCL, (h) drill-only. Symbols (e-h) Thick black arrow: angiogenic tissue; open arrows: exposed PCL bioplastic, thin arrows: cartilage repair tissue.