Identifying complications requiring re-operation following primary hip or knee arthroplasty: a consecutive series of 98 patients

Table 3 Types of complications

	Aseptic loosening	Infection	Fracture	Dislocation	Progressive joint disease	Defective prosthesis	Mal-alignment	Other
Hip (n = 39)	11 (28.2%)	6 (15.4%)	10 (25.6%)	8 (20.5%)	4^a (10.3%)	1^c (2.6%)	0	0
Hip metal on metal (n = 9)	3 (33.3%)	0	1 (11.1%)	0 (0%)	0	4^d (44.4%)	0	1^f(11.1%)
Knee (n = 50)	25 (50.0%)	13 (26.0%)	4 (8.0%)	2 (4.0%)	4^b (8.0%)	1^e (2.0%)	2 (4.0%)	4^g (8.0%)
Total	39 (39.8%)	19 (19.4%)	15 (15.3%)	10 (10.2%)	8 (8.2%)	6 (6.1%)	2 (2.0%)	5 (5.1%)

Note: more than one diagnosis possible (five patients had two diagnoses); % is proportion of patients with complication for that arthroplasty type. ^aAcetabular disease post hemiarthroplasty; ^bPatello-femoral disease (n = 2) or tibio-femoral disease (n = 2) post unilateral replacement; ^cArticular Surface Replacement (ASR) acetabular system [15]; ^dASR resurfacing system [15]; ^efailure of zimmer rotating hinge; ^fpain without radiological abnormality; ^garthrofibrosis (n = 1), loose body (n = 1), synovitis without infection (n = 1), instability (tibiofemoral subluxation) (n = 1)

ISSN: 1471-2474