Assessment Using AutoCAD Software of the Preparation of Dentin Walls in Root Canals Produced by 4 Different Endodontic Instrument Systems

Table 1

-test showed the presence of statistically significant differences () at coronal third.

	Step-Back	ProTaper Universal	ProTaper Next	Wave One
Step-Back		0.06267	0.4362	0.0001228
ProTaper Universal			0.1525	6.595 × 10^−6
ProTaper Next				2.848 × 10^−5
Wave One