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Table 4 Biomechanical analysis in terms of displacement—comparison between control and treatment group at different time intervals

From: A study to compare the efficacy of polyether ether ketone rod device with titanium devices in posterior spinal fusion in a canine model

Mechanical analysis: displacement

8 weeks

16 weeks

Control group (n = 8)

Treatment group (n = 8)

Control group (n = 8)

Treatment group (n = 8)

Anteflexion (N/mm)

0.51 ± 0.04

0.49 ± 0.03

0.35 ± 0.02

0.29 ± 0.02*

Dorsiflexion (N/mm)

0.51 ± 0.05

0.52 ± 0.04

0.38 ± 0.02

0.39 ± 0.03

Left lateroflexion (N/mm)

0.59 ± 0.05

0.51 ± 0.04*

0.36 ± 0.04

0.27 ± 0.04*

Right lateroflexion(N/mm)

0.62 ± 0.04

0.54 ± 0.05*

0.38 ± 0.03

0.29 ± 0.04*

Left rotation (N/deg)

2.14 ± 0.34

1.58 ± 0.26*

1.15 ± 0.21

0.64 ± 0.21*

Right rotation (N/deg)

1.99 ± 0.26

1.47 ± 0.24*

1.02 ± 0.26

0.62 ± 0.18*

  1. *p < 0.01