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Tab 2 Anterior, distal and posterior relative motion at 50° 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

15.3 ± 1.0

0.002

7.6 ± 1.7

0.140

21.3 ± 1.1

< 0.001

Pressurizer

22.2 ± 3.1

6.9 ± 1.5

16.5 ± 0.4

1500 N

Regular

21.3 ± 1.2

< 0.001

10.2 ± 0.7

0.145

23.3 ± 0.4

< 0.001

Pressurizer

32.2 ± 2.4

10.6 ± 1.1

19.7 ± 0.6

1800 N

Regular

27.1 ± 1.8

< 0.001

12.6 ± 0.9

0.028

25.8 ± 0.2

< 0.001

Pressurizer

39.8 ± 1.6

13.3 ± 0.6

21.8 ± 0.7

2100 N

Regular

35.2 ± 1.7

< 0.001

15.0 ± 1.1

0.013

31.7 ± 0.9

< 0.001

Pressurizer

46.8 ± 1.8

16.7 ± 0.8

23.2 ± 0.9

  1. The max anterior relative motion at 50° flexion was at 2100 N for both groups: 78.1 µm for the group without a nozzle, and 150.9 µm for the group with nozzle
  2. The max distal relative motion at 50° flexion was at 2100 N for both groups: 55.6 µm for the group without a nozzle, and 81.3 µm for the group with nozzle
  3. The max posterior relative motion at 50° flexion was at 2100 N for both groups: 79.1 µm for the group without a nozzle, and 70.4 µm for the group with nozzle