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Table 3 Biomechanical analysis in terms of stiffness—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: stiffness

8 weeks

16 weeks

Control group (n = 8)

Treatment group (n = 8)

Control group (n = 8)

Treatment group (n = 8)

Anteflexion (N/mm)

206.16 ± 19.01

205.61 ± 20.38

293.30 ± 9.24

307.66 ± 14.84#

Dorsiflexion (N/mm)

202.04 ± 21.76

202.96 ± 20.98

275.93 ± 11.50

278.91 ± 18.60

Left lateroflexion (N/mm)

178.95 ± 16.19

194.96 ± 19.72

287.24 ± 12.50

302.45 ± 15.12#

Right lateroflexion(N/mm)

179.74 ± 17.32

193.53 ± 16.00

273.48 ± 16.60

295.01 ± 16.13#

Left rotation (N/deg)

2.10 ± 0.26

2.59 ± 0.26*

3.67 ± 0.12

4.17 ± 0.19*

Right rotation (N/deg)

2.24 ± 0.12

2.61 ± 0.16*

4.07 ± 0.22

4.59 ± 0.19*

  1. # p < 0.05, *p < 0.01