Evaluation of the Effect of Fixation Angle between Polyaxial Pedicle Screw Head and Rod on the Failure of Screw-Rod Connection

Table 3

Flexion moment test results.

	6.5 45		7.0 45		7.5 45
	V	A	V	A	V	A
Maximum load (N)	843	796	1146	1283	1189	1234
Std.	103	45	162	141	190	252
Displacement at maximum load (mm)	20.14	13.02	25.33	19.37	23.64	16.28
Std.	1.81	2.78	5.26	2.57	2.70	1.23
Moment at maximum load (N·mm)	26791	25812	37653	43073	38728	40828
Std.	3598	1523	6364	4851	6743	8474
Minimum sagittal angle (°)	49.61	43.87	40.50	32.85	43.40	38.14
Std.	3.25	4.90	9.10	4.37	4.80	2.13