Table 1.

Error results before and after correction for each helix

	Helix 1	Helix 2	Helix 3
Average error (mm)	1.06	1.15	1.58
Corrected error (mm)	0.36	0.25	0.48
Average error (mm) (high error range)	2.33	2.34	2.15
Corrected error (mm) (high error range)	0.21	0.19	0.25