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

Table 1

The mean values (standard deviation) of the ratio of surface area change to volume change and SMI change after the ProTaper instrumentation in straight and curved natural canals.

Groups	ΔSA/ΔV	ΔSMI
Straight	2.05 ns; (0.88)	0.65 ns (1.00)
Curved	3.23; (0.30)	0.44 ns (0.47)
Significance between groups		ns

Statistically significant at p<0.05 level.
Statistically significant at p≤0.01 level.
ns: not statistically significant (n=10).