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Table 1 Vertical displacement of the Hoffa fracture at three different load levels and from load to failure

From: The effect of screw orientation on internal fixation of Letenneur type II Hoffa fractures: a biomechanics study

Groups

Vertical displacement (mm)

Load to failure (N)

 

250 N

500 N

750 N

 

IIa AP

1.351 ± 0.113

2.596 ± 0.125

3.997 ± 0.164

384 ± 14

IIb AP

1.689 ± 0.116

2.949 ± 0.116

4.445 ± 0.196

311 ± 13

IIc AP

2.028 ± 0.119

3.302 ± 0.106

4.892 ± 0.230

239 ± 14

IIa PA

1.465 ± 0.073

2.344 ± 0.099

3.386 ± 0.125

415 ± 19

IIb PA

0.884 ± 0.069

1.792 ± 0.095

2.708 ± 0.108

576 ± 17

IIc PA

0.303 ± 0.065

1.240 ± 0.091

2.029 ± 0.091

738 ± 19

P (IIa AP-IIb AP)

0.000

0.000

0.000

0.000

P (IIa AP-IIc AP)

0.000

0.000

0.000

0.000

P (IIb AP-IIc AP)

0.000

0.000

0.001

0.000

P (IIa PA-IIb PA)

0.000

0.000

0.000

0.000

P (IIa PA-IIc PA)

0.000

0.000

0.000

0.000

P (IIb PA-IIc PA)

0.000

0.000

0.000

0.000

P (IIa AP-IIa PA)

0.031

0.001

0.000

0.002

P (IIb AP-IIb PA)

0.000

0.000

0.000

0.000

P (IIc AP-IIc PA)

0.000

0.000

0.000

0.000

  1. IIa Letenneur type IIa fracture, IIb Letenneur type IIb fracture, IIc Letenneur type IIc fracture, AP anterior to posterior nailing, PA posterior to anterior nailing