Evaluation of Stability of Rotating Hinge Knee Prostheses: A Biomechanical Study

Table 2

Results of the biomechanical analysis using the custom made biomechanical apparatus (Figures 3(a)–3(c)).

Manufacturer	Stem length (mm)	Stem taper (deg)	Polyethylene inlay (mm)	Minimum distraction to dislocate (mm)	AL at 25 mm of distraction (deg)/method 1	AL at 25 mm of distraction (deg)/method 2
Stryker—GMRS	47	0	10	38	3,2 (SD: 0,33)	3,3 (SD: 0,61)
DePuy—LPS/M.B.T.	46	0	—	27	11,2 (SD: 0,80)	11,3 (SD: 1,28)
DePuy—S-ROM Noiles	46	5	—	26	18,4 (SD: 1,73)	17,0 (SD: 1,13)
PLUS Orthopedics—RT-Plus	38	0	8	30	3,0 (SD: 0,90)	2,9 (SD: 0,90)
Zimmer—NexGen	46	0	12	36	2,1 (SD: 0,68)	2,3 (SD: 0,66)
Zimmer—NexGen	60	0	26	42	2,3 (SD: 0,32)	2,6 (SD: 0,44)

AL: angular laxity; SD: standard deviation.