Table 5.

Reasons for revision or reoperation in revised THAs performed in the period 2007–2014 in the Netherlands (n = 3,879)

	Non-mixed THA (n = 3,403)		Mixed THAa (n = 476)		Total (n = 3,879)
Revision within 6 years for	n	%	n	%	n	%
Infection	379	11	57	12	436	11
Periprosthetic fracture	450	13	62	13	512	13
Symptomatic MoMb bearing	223	6.6	8	1.7d	231	6.0
Dislocation	969	29	152	32	1,121	29
Loosening of femur	712	21	84	18	796	21
Loosening of acetabulum	421	12	77	16c	498	13
Cup/liner wear	119	3.5	16	3.4	135	3.5
Periarticular ossification	71	2.1	14	2.9	85	2.2
Girdlestone	141	4.1	19	4.0	160	4.1
Other	549	16	78	16	627	16

^aThis group includes mixed stem-head THAs, mixed head-cup THAs, and mixed stem-head-cup THAs.

^bMoM: metal-on-metal.

^cp < 0.05

^dp < 0.0001.