Table 5.

Articular Lesions According to Hepple Classification Preoperatively and at Final Follow-up

	Preoperative		Final Follow-up
Grade a	Single Stage (n = 52)	Staged (n = 51)	Single Stage (n = 50)	Staged (n = 48)
Normal	0	0	2	1
Stage 1	0	0	27	25
Stage 2 (2a or 2b)	6	2	18	20
Stage 3	3	7	3	2
Stage 4	10	8	0	0
Stage 5	33	34	0	0

^a Hepple classification grades: 1, articular cartilage injury; 2, cartilage injury with bony fracture and edema (2a, acute; 2b, chronic); 3, detached nondisplaced bony fragment with fluid rim beneath fragment; 4, displaced fragment and uncovered subchondral bone; and 5, subchondral cyst present.