Effectiveness of Parameters in Quantifying Root Canal Morphology Change after Instrumentation with the Aid of a Microcomputed Tomography

Table 3

Cross-sectional shape of straight resin simulated root canals at 14 mm coronal from the apex: mean values (standard deviation) of Form Factor, Roundness, and Eccentricity pre- and postinstrumentation with the ProTaper system.

Groups	Form Factor	Roundness	Eccentricity
Preinstrumentation	0.898; (0.039)	0.937; (0.047)	0.08; (0.091)
Postinstrumentation	0.833; (0.027)	0.901; (0.04)	0.24; (0.044)
Significance between Groups		ns

Statistically significant at p<0.05 level.
Statistically significant at p<0.005 level.
ns: not statistically significant (n=10).