Quantitative Analysis of Cone-Beam Computed Tomography Artifacts Induced by Nonmetallic Root Canal Filling Materials Using Different Fields of View: In Vitro Study

Table 1

Paired -test for pre- and postobturation scans in the coronal and middle thirds.

Section	Material	FOV	Value	Mean	Std. dev.	Std. error	95% confidence interval of the difference			df	Sig.
							Lower	Upper
Coronal third	Gutta-percha		Min	8.200	28.642	9.057	-12.289	28.689	0.905	9	0.389
			Max	-2.200	4.211	1.331	-5.212	0.812	-1.652	9	0.133
			Skew.	-0.774	0.497	0.157	-1.130	-0.418	-4.921	9	0.001
			Min	-0.300	35.882	11.347	-25.968	25.368	-0.026	9	0.979
			Max	3.900	5.384	1.702	0.0484	7.751	2.291	9	0.048
			Skew.	1.038	0.582	0.184	0.621	1.454	5.638	9	0.000
	Glass-fiber post		Min	-2.900	32.925	10.412	-26.453	20.653	-0.279	9	0.787
			Max	-1.800	3.735	1.181	-4.472	0.872	-1.524	9	0.162
			Skew.	-0.478	0.914	0.289	-1.132	0.175	-1.656	9	0.132
			Min	7.100	26.768	8.464	-12.048	26.248	0.839	9	0.423
			Max	1.700	1.828	0.578	0.391	3.008	2.940	9	0.016
			Skew.	0.406	0.703	0.222	-0.097	0.909	1.825	9	0.101
Middle third	Gutta-percha		Min	12.800	15.310	4.841	1.847	23.752	2.644	9	0.027
			Max	-4.400	6.203	1.961	-8.838	0.0380	-2.243	9	0.052
			Skew.	-0.0743	0.556	0.175	-0.472	0.323	-0.422	9	0.683
			Min	-19.400	24.495	7.746	-36.923	-1.876	-2.504	9	0.034
			Max	2.000	5.477	1.732	-1.918	5.918	1.155	9	0.278
			Skew.	-0.025	0.633	0.200	-0.478	0.427	-0.126	9	0.903
	Glass-fiber post		Min	-3.500	26.437	8.360	-22.412	15.412	-0.419	9	0.685
			Max	-2.500	4.453	1.408	-5.685	0.685	-1.775	9	0.110
			Skew.	0.040	0.434	0.137	-0.270	0.351	0.295	9	0.775
			Min	3.400	22.652	7.163	-12.804	19.604	0.475	9	0.646
			Max	4.500	4.904	1.551	0.991	8.008	2.901	9	0.018
			Skew.	0.097	0.515	0.163	-0.271	0.466	0.599	9	0.564

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