Condylar constrained knee prosthesis and rotating hinge prosthesis for revision total knee arthroplasty for mechanical failure have not the same indications and same results

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Table 3

Complications related to the revision prosthesis at two years.

	CCK group	RHK group	P value
Complication^a	4/33 (12.1%)	12/30 (40%)	0.04
Type of complication^b
Acute PJI	2	1	n.s.
Aseptic loosening	0	3	n.s.
Septic loosening	0	1	n.s.
Extensor mechanism	0	6	0.04
Stiffness	2	1	n.s.
Femorotibial instability	0	1	n.s.
Re-intervention^b
DAIR	2	1	n.s.
Arthrolysis	2	2	n.s.
Extensor mechanism intervention	0	2	n.s.
Re-revision with change of implant	0	6	0.008
Total	4 (12.1%)	11 (36.7%)	0.04

Data are presented as number of patients (proportion).

Complications are presented in number of occurrences. Two patients of RHK group had several consecutive complications.

PJI: prosthetic joint infection; DAIR: debridement, antibiotics, and implant retention.

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