Revision in previously satisfied knee arthroplasty patients is the result of their call on the physician, not on pre-planned follow-up: A retrospective study of 181 patients who underwent revision within 2 years

Figures & data

Figure 1. Relation in time between primary operation, questionnaire and revision of the 181 patients.

Table 1. Patient age and time to revision. Values are median years (range)

	OA n = 151	RA n = 29	All n = 181
Age^a	74 (39–88)	69 (31–87)	74 (31–88)
Years between operation and revision questionnaire^a and revision	8.0 (2.9–21)	10 (3.9–21)	8.2 (2.9–21) 1.4 (0.3–2.3)

^ain August 1997

Table 2. The main reasons for revision, as stated by the surgeon in the operative report (n = 181).

Indication for revision	n
Loosening/migration of prosthesis	74
Polyethylene wear	39
Progress of OA	25
Deep infection	10
Fracture of prosthesis	8
Instability, dislocation	6
Patellofemoral complications	6
Arteriosclerotic gangrene	4
Diabetic gangrene	3
Fracture of femoral condyle	2
Femoral pseudarthrosis	2
Various (progress of RA/pain)	2