Table 5.

Mean surface areas (mm²) and standard deviation of distobuccal canal

	Before instrumentation						After instrumentation							Absolute change
	Coronal third		Middle third		Apical third		Coronal third		Middle third			Apical third		Coronal third		Middle third		Apical third
n = 12	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD		Mean	SD	Mean	SD	Mean	SD	Mean	SD
Group A	0.804	0.093	0.510	0.059	0.100	0.047	1.546	0.157	0.743	0.086		0.196	0.098	0.742	0.067	0.233	0.027	0.096	0.051
Group B	0.806	0.156	0.481	0.099	0.090	0.040	1.852	0.395	0.908	0.168		0.199	0.085	1.046	0.248	0.427	0.075	0.109	0.046
Group C	0.796	0.148	0.490	0.078	0.099	0.005	1.883	0.325	0.907	0.133		0.212	0.006	1.087	0.182	0.418	0.056	0.113	0.001
ANOVA test applied											F			12.896		44.853		0.572
											p			0.00(S)		0.00 (S)		0.567 (NS)

p < 0.05 = Significant (S= significant; NS= nonsignificant)