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Table 1 Results of mean torsional resistance for studied stem diameters and diaphyseal contact depths. Group Mean Torsional Resistance Data *

From: Stem diameter and rotational stability in revision total hip arthroplasty: a biomechanical analysis

Size 18:

 

40 um

50 um

100 um

150 um

ε

4 cm

Mean:

18.94

21.48

29.56

32.32

0.3972

 

SD:

2.51

1.97

5.17

8.02

0.0939

3 cm

Mean:

16.87

19.96

26.21

25.8

0.3398

 

SD:

1.26

2.49

5.15

5.82

0.0695

2 cm

Mean:

11.39

13.04

20.31

23.02

0.2532

 

SD:

7.42

9.16

15.38

15.54

0.1666

Size 15:

 

40 um

50 um

100 um

150 um

ε

4 cm

Mean:

13.24

15.43

21.54

23.2

0.2378

 

SD:

2.67

2.85

4.34

6.14

0.0741

3 cm

Mean:

10.69

13.26

23.41

27.49

0.258

 

SD:

3.36

4.5

8.13

7.16

0.086

2 cm

Mean:

7

8.07

13.07

17.66

0.0958

 

SD:

1.58

1.79

2.34

3.16

0.0242

  1. * all units are Newton-meters (Nm) except interface stiffness
  2. ε = interface stiffness (um/Nm)
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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X