Cumulative Incidence of Revision for a Balanced Knee System at a Mean 8-Year Follow-Up: A Retrospective Review of 500 Consecutive Total Knee Arthroplasties

Table 6

Frequency of radiolucent lines in the anteroposterior (AP) tibial zones.

Radiolucent Zones	n (%)
Tibia: bone interface (A)
zone 1	4 (80)
zone 2	1 (20)
zone 3	1 (20)
zone 4	1 (20)
zone 5	1 (20)
zone 6	1 (20)
zone 7	0
Tibial: cement/prosthesis (A)
zone 1	2 (67)
zone 2	2 (67)
zone 3	2 (67)
zone 4	2 (67)
zone 5	0
zone 6	0
zone 7	0

a: anteroposterior.