Table 2.

Histological grading score B (subchondral bone repair)

Category (points)
Filling of defect area
91–110% (4)
76–90% (3)
51–75% (2)
26–50% (1)
<25% (0)
Lateral osseous integration
Bonded at both sides (2)
Bonded at one side, partially at both sides (1)
No bonding (0)
Basal integration
91–100% (3)
70–90% (2)
50–70% (1)
<50% (0)
Total maximum points B = 9