Table 3.

Cartilage injury location and procedures by registry and procedure type

Location/Procedure	NKLR		KP ACLRR a
	Primary (n = 10,468) n (%)	Revision (n = 749) n (%)	Primary (n = 7,275) n (%)	Revision (n = 493) n (%)
Cartilage injury	2,636 (25.2)	307 (41.0)	2,101 (28.9)	202 (41.0)
Patella	516 (4.9)	74 (9.9)	562 (7.7)	56 (11.4)
Debridement	40 (7.8)	4 (5.4)	238 (42.3)	27 (48.2)
Microfracture	2 (0.4)	0 (0.0)	2 (0.4)	0 (0.0)
None	461 (89.3)	49 (66.2)	321 (57.1)	28 (50.0)
Other	13 (2.5)	1 (0.1)	1 (0.2)	1 (1.8)
Trochlea	260 (2.5)	67 (8.9)	301 (4.1)	45 (9.1)
Debridement	15 (5.8)	4 (6.0)	99 (32.9)	18 (40.0)
Microfracture	4 (1.5)	2 (3.0)	11 (3.7)	3 (6.7)
None	241 (92.7)	41 (61.2)	190 (63.1)	24 (53.3)
Other	0 (0.0)	2 (3.0)	1 (0.3)	0 (0.0)
Medial femoral condyle	1,601 (15.3)	220 (29.4)	1,120 (15.4)	116 (23.5)
Debridement	255 (15.9)	15 (6.8)	390 (34.8)	38 (32.8)
Microfracture	87 (5.4)	8 (3.6)	78 (7.0)	7 (6.0)
None	1,233 (77.0)	149 (67.7)	648 (57.9)	69 (59.5)
Other	26 (1.6)	4 (1.8)	4 (0.4)	2 (1.7)
Lateral femoral condyle	591 (5.6)	95 (12.7)	505 (6.9)	50 (10.1)
Debridement	53 (9.0)	7 (7.4)	114 (22.6)	21 (42.0)
Microfracture	17 (2.9)	3 (3.2)	35 (6.9)	7 (14.0)
None	511 (86.5)	59 (62.1)	351 (69.5)	22 (44.0)
Other	10 (1.7)	1 (1.1)	5 (1.0)	0 (0.0)
Medial tibial plateau	680 (6.5)	135 (18.0)	170 (2.3)	29 (5.9)
Debridement	49 (7.2)	6 (4.4)	25 (14.7)	4 (13.8)
Microfracture	4 (0.6)	2 (1.5)	4 (2.4)	0 (0.0)
None	622 (91.5)	93 (68.9)	139 (81.8)	25 (86.2)
Other	5 (0.7)	2 (1.5)	2 (1.2)	0 (0.0)
Lateral tibial plateau	690 (6.6)	98 (13.1)	340 (4.7)	28 (5.7)
Debridement	28 (4.1)	4 (4.1)	99 (29.1)	10 (35.7)
Microfracture	1 (0.1)	1 (1.0)	3 (0.9)	0 (0.0)
None	647 (93.8)	69 (70.4)	236 (69.4)	18 (64.3)
Other	14 (2.0)	2 (2.0)	2 (0.6)	0 (0.0)

^a Kaiser Permanente: data available for a limited sample.

For abbreviations, see Table 1