Table 3.

Primary UKA by reason for revision in clinical studies

Reason for revision	Number	Percent
Loosening	203	25.8
Progression of disease	193	24.4
Pain	98	12.4
Bearing dislocation	81	10.2
Infection	32	4.0
Wear	22	2.8
Lysis	21	2.7
Fracture	20	2.5
Instability	13	1.6
Other	13	1.6
Unknown	95	12.0
Total	791	100