Ex vivo biomechanical study on a porcine model of three types of stabilisation in scoliosis treatment

Figures & data

Figure 1. Implantation scheme of the spine. The spine were then implanted with 10 bicortical pedicle screws, in quincunx using on each side 4 sliding pedicle screws and 1 fixed pedicle screw at the centre of the construct. A 5.5 mm PEEK flexible rod (SP group) or a 5.5 mm titanium rod (ST group) was then inserted into the screws.

Table 1. Results, the p value relates to the S group.

Parameters	S group	SP group (p value)	ST group (p value)
ROM (mm)	51 ± 4	48 ± 6 (p = 0.09)	7 ± 2 (p < 0,001)
NZ (mm)	10 ± 7	8 ± 2 (p = 0.38)	1 ± 0.2 (p < 0,001)
OS (N/mm)	3 ± 1	10 ± 2 (p = 0.57)	138 ± 47 (p < 0,001)
FLS (N/mm)	69 ± 11	53 ± 13 (p = 0.128)	147 ± 36 (p < 0,001)
ELS (N/mm)	26 ± 13	29 ± 7 (p = 0,724)	129 ± 28 (p < 0,001)