Dentin Morphology of Root Canal Surface: A Quantitative Evaluation Based on a Scanning Electronic Microscopy Study

Table 1

Average and St. Dev. of tubular number and tubular diameter (three observations/areas of 400 µm²).

	Sample 1	Sample 2	Sample 3	Sample 4	Sample 5	Sample 6	Sample 7	Sample 8	Sample 9	Sample 10
Portion	Tubular number
Apical	17	6	21	23	11	13	19.33	23	25	22
Middle	12	13.66	12.66	11.33	11	7.66	16.6	14	18	7.12
Coronal	14.66	17.33	23.33	12	14.33	15	23	21	26	22
Portion	Tubular diameter
Apical	0.69	3.36	0.62	0.56	2.21	1.93	2.17	2.34	2.28	2.1
Middle	6.11	2.32	2.72	3.12	2.6	4.69	6.64	6.35	5.97	6.03
Coronal	3.36	3.08	3.38	5.38	4.05	5.8	5.9	5.05	3.69	6.43
	Sample 11	Sample 12	Sample 13	Sample 14	Sample 15	Sample 16	Sample 17	Sample 18	Sample 19	Sample 20
Portion	Tubular number
Apical	15	20	18	14	22	24	14.33	22	17	14
Middle	12.33	5.33	15.66	8.66	15.33	12	14.66	16.33	15.33	13.33
Coronal	20.66	12.33	16.33	13	15	13.66	24	23.66	18.33	23
Portion	Tubular diameter
Apical	0.67	0.58	2.11	3.2	2.15	2.33	2.56	2.54	0.54	0.66
Middle	1.7	3.13	3.08	3.17	2.41	2.64	2.36	2.98	3.48	3.27
Coronal	2.44	4.38	4.2	3.97	2.57	3.57	4.25	5.7	3.33	5.76
	Sample 21	Sample 22	Sample 23	Sample 24	Sample 25	Sample 26	Sample 27	Sample 28	Sample 29	Sample 30
Portion	Tubular number
Apical	21	20.33	14	15	23	22	17	16	14.66	18.66
Middle	13.66	11.66	12.66	11.33	7.33	15	14.66	7.33	11.33	13.33
Coronal	21.33	18.33	14.66	19.66	15.33	24	24.66	16.33	11.33	23.33
Portion	Tubular diameter
Apical	2.26	2.73	0.55	2.44	2.23	2.72	0.41	1.97	0.46	0.56
Middle	2.42	2.86	4.79	3.21	6.23	2.46	3.47	6.12	2.7	3.44
Coronal	5.27	3.9	3.54	4.2	4.67	5.37	4.21	4.1	3.76	4.41
		Tubular number				Tubular diameter
		Portion	Average	St. Dev.		Portion	Average	St. Dev.
		Apical	18.077	4.35		Apical	1.731	0.93
		Middle	12.376	3.10		Middle	3.749	1.48
		Coronal	18.586	4.25		Coronal	4.324	1.00