Polyvinyl Alcohol Hydrogel Irradiated and Acetalized for Osteochondral Defect Repair: Mechanical, Chemical, and Histological Evaluation after Implantation in Rat Knees

Table 1

Criteria and score evaluation by GE's optical microscopy.

Evaluated criteria	Scores
Granulation tissue (GT)	Absent (+); Moderate (++); Intensive (+++)
Collagen fibers (CF)
Mineralized bone matrix (MB)
Neoformed bone tissue (NB)
Collapse of neoformed tissue (CN)