Table 2.

Pedicle screw results

No.	Segment	Average pressure			Peak pressure			Force
		No construct	Construct	% decrease	No construct	Construct	% decrease	No Construct	Construct	% difference
1	C6–7	0.127	0.072	43.3	0.458	0.160	65.1	15.847	4.619	70.9
2	C4–5	0.351	0.271	22.7	1.028	0.793	22.9	36.376	20.602	43.4
3	C6–7	0.253	0.191	24.5	0.599	0.460	23.2	29.054	15.566	46.4
4	C4–5	0.257	0.198	22.9	0.898	0.652	27.3	38.341	21.472	44.0
5	C6–7	0.145	0.116	20.0	0.769	0.650	15.5	16.985	12.595	25.8
6	C4–5	0.152	0.109	28.3	0.528	0.373	29.3	14.139	8.457	40.2

Mean average pressure, peak pressure and force at the intervertebral disc space with an axial load of 90 N for pedicle screw-rod constructs. Pressure values are reported in megapascals (MPa) and force values are reported in newtons (N)

Average pressure: ** p ≤ 0.0006

Peak pressure: ** p ≤ 0.001

Force: ** p ≤ 0.003