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Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 1 Results for the parameters of interest in the nonaugmented and augmented screw groups

From: Removal of cement-augmented screws in distal femoral fractures and the effect of retained screws and cement on total knee arthroplasty: a biomechanical investigation

 

Nonaugmented screw group

Augmented screw group

p value

BMD, mgHA/cm3

 Mean (SD)

148 (42)

161 (31)

0.13#

 Median (range)

156 (76–192)

158 (112–201)

 

 Number of broken screws

9 of 24

17 of 24

 < 0.001*

Screw removal torque, Nm

 Mean (SD)

4.86 (1.0)

4.97 (0.8)

0.65#

 Median (range)

4.9 (2.6–7.1)

5 (3.1–6.7)

 

Femoral component pull-out force, N

 Mean (SD)

2653 (542)

2625 (603)

0.94#

 Median (range)

2573 (1878–3860)

2595 (1680–3501)

 
  1. p value based on #the paired-samples t test or * Fisher’s exact test