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Table 3 Parameters results

From: Biomechanical properties of off-axis screw in the treatment of vertical femoral neck fractures: a finite element analysis

Parameters

ICCS

7.3-PTOS

4.5-FTOS

7.3-FTOS

The maximum displacement of the femur (mm)

10.40

8.08

7.71

7.15

The maximum displacement of the implant (mm)

9.76

7.55

7.25

6.78

Maximum femur stress (MPa)

218.04

121.99

123.42

113.86

Internal fixation maximum stress (MPa)

397.55

202.35

216.61

164.69

The maximum movement within the fracture gap (mm)

2.73

1.19

0.94

0.55

The maximum displacement of Z axis (mm)

2.93

2.69

2.66

2.63

  1. ICCS: the traditional inverted triangular cannulated screw model. 7.3-PTOS: two cancellous screws and a 7.3 mm partially threaded transverse screw inserted into the inferior head model. 4.5-FTOS: two cancellous screws along with a 4.5 mm fully threaded transverse screw placed into the calcar model. 7.3-FTOS: two cancellous screws and a 7.3 mm fully threaded transverse screw placed into the inferior head model
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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