Table 2 Histology pineda scoring scale

Cartilage composition

Normal

0

Mostly hyaline cartilage

1

Mixed hyaline and fibrocartilage

2

Mostly fibrocartilage

3

Non-chondrocyte or tissue-free filling

4

Cartilage matrix staining

Normal

0

Slightly reduced

1

Reduced

2

Significantly reduced

3

No staining

4

Flatness of cartilage surface

Flatness (> 3/4)

0

Medium flatness (1/2 ~ 3/4)

1

No flatness (1/4 ~ 1/2)

2

Very no flatness (< 1/4)

3

Cartilage thickness

> 2/3

0

1/3 ~ 2/3

1

< 1/3

2

Integration of cartilage and peripheral cartilage

Both graft edges bonded

0

One graft edge bonded

1

Neither edge bonded

2

Subchondral bone morphology

Normal cancellous bone

0

Some of the cancellous bone is hardened

1

sclerotic bone

2

Sclerotic bone and some fibrous tissue

3

Fibrous tissue only or no tissue filling

4

Subchondral bone and peripheral osseous integration

Both graft edges bonded

0

One graft edge bonded

1

Neither edge bonded

2