Figure 3

Gross photography of cartilage defect (white arrow). (A) Post-surgery: A femoral condylar cartilage defect was created surgically deep to calcification zone until subchondral bone exposure. (B) Post-surgery 3-months without LIPUS treatment: persisted exist cartilage defect without obvious coverage of proliferative tissue. (C) Post-surgery 3-months with LIPUS treatment: proliferative tissue filled the defect to form a rough surface instead of hollow defect.