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

Table 3

Comparing minimum and maximum grayscale values for gutta-percha and glass-fiber posts.

FOV	Section level	Grayscale values	Material		Mean	Std. error	Sig.
	Coronal third	Min	Gutta-percha	10	153.200	11.0653	0.184
			Glass-fiber post	10	171.100	6.7486
		Max	Gutta-percha	10	251.900	1.9117	0.436
			Glass-fiber post	10	253.500	0.6191
	Middle third	Min	Gutta-percha	10	169.100	4.8108	0.506
			Glass-fiber post	10	174.300	5.9648
		Max	Gutta-percha	10	251.100	1.1590	0.212
			Glass-fiber post	10	248.700	1.4457
	Coronal third	Min	Gutta-percha	10	161.100	11.7260	0.319
			Glass-fiber post	10	175.300	7.3591
		Max	Gutta-percha	10	253.600	0.7775	0.844
			Glass-fiber post	10	253.400	0.6360
	Middle third	Min	Gutta-percha	10	162.500	7.1184	0.293
			Glass-fiber post	10	174.200	8.1128
		Max	Gutta-percha	10	248.700	1.0333	0.177
			Glass-fiber post	10	250.700	0.9781

.