Table 2.

Summary of all radiolucent lines in the anterior–posterior (AP) tibial, lateral tibial and lateral femoral radiograph in patients with the modern primary TKA system (ATT) and its predecessor system (PFC) after 12 months of follow up

Location, radiolucency	ATT, n = 276	PFC, n = 253	p value
Tibia AP	13.4% (n = 37; I/C: n = 34)	4% (n = 10; I/C: n = 5)	0.001
Tibia Lateral	20.3% (n = 56; I/C: n = 53)	2.4% (n = 6; I/C: n = 6)	< 0.001
Femur lateral	14.5% (n = 40; I/C: n = 40)	2% (n = 5; I/C: n = 5)	< 0.001

I/C implant/cement interface, n.s. non-significant