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Table 1 Anterior, distal and posterior relative motion at 20° flexion of the femur depending on the load

From: Is TKA femoral implant stability improved by pressure applied cement? a comparison of 2 cementing techniques

 

anterior

distal

posterior

load level

N = 14

mean values ± SD (µm)

p-value

mean values ± SD (µm)

p-value

mean values ± SD (µm)

p-value

1200 N

Regular

10.0 ± .1.3

0.011

8.8 ± 1.2

0.158

11.8 ± 0.7

0.064

Pressurizer

13.4 ± 2.9

8.1 ± 0.7

10.8 ± 0.7

1500 N

Regular

14.5 ± 1.0

0.001

10.6 ± 0.4

0.010

13.3 ± 0.6

0.351

Pressurizer

21.1 ± 2.4

11.9 ± 0.8

13.5 ± 0.6

1800 N

Regular

18.4 ± 1.3

< 0.001

12.6 ± 0.9

0.003

15.7 ± 0.7

0.131

Pressurizer

29.9 ± 2.8

14.6 ± 0.4

16.3 ± 1.2

2100 N

Regular

24.8 ± 1.5

< 0.001

15.1 ± 0.8

0.040

20.3 ± 1.7

0.322

Pressurizer

42.1 ± 3.4

16.3 ± 1.6

20.6 ± 1.4

  1. The max anterior relative motion at 20° flexion was at 2100 N for both groups: 53.7 µm for the group without a nozzle, and 130.7 µm for the group with nozzle
  2. The max distal relative motion at 20° flexion was at 2100 N for both groups: 48.8 µm for the group without a nozzle, and 64.3 µm for the group with nozzle
  3. The max posterior relative motion at 20° flexion was at 2100 N for both groups: 56.6 µm for the group without a nozzle, and 54.3 µm for the group with nozzle