Micro-computed tomographic evaluation on the quality of single-cone obturation using a modified passive-deflation sealer injection needle: an in vitro study

Table 2 Volumetric Percentages of Closed and Open Voids (mean ± SD) in SCO Groups

Group	Overall Volume of Voids (%)		Volume of Voids in Coronal 1/3 (%)		Volume of Voids in Middle 1/3 (%)		Volume of Voids in Apical 1/3 (%)		P value*
Group	Closed	Open	Closed	Open	Closed	Open	Closed	Open	Closed	Open
E	0.00 ± 0.000^A	2.04 ± 0.761^{a, A}	0.00 ± 0.000^B	1.61 ± 0.596^{a, B}	0.00 ± 0.000^C	1.71 ± 2.116^{a, C}	0.00 ± 0.000^D	4.96 ± 2.163^{a, D}	1.000	0.019
F	0.00 ± 0.000	0.26 ± 0.302^a	0.00 ± 0.000	0.20 ± 0.311^a	0.00 ± 0.000	0.30 ± 0.685^a	0.00 ± 0.000	0.43 ± 0.557^a	1.000	0.822
G	0.12 ± 0.196^A	4.74 ± 2.958^{b, A}	0.32 ± 0.581^B	7.52 ± 8.478^{b, B}	0.00 ± 0.000^C	4.86 ± 3.920^{b, C}	0.00 ± 0.000^D	6.53 ± 4.399^{b, D}	0.120	0.810
H	0.00 ± 0.000	0.46 ± 0.767^b	0.00 ± 0.000	0.81 ± 1.315^b	0.00 ± 0.000	0.06 ± 0.149^b	0.00 ± 0.000	0.17 ± 0.419^b	1.000	0.587

Same lowercase superscript letters in a column represent a statistical difference determined by Mann-Whitney test (P < 0.05)
Same uppercase superscript letters in a row represent a statistical difference determined by Mann-Whitney test (P < 0.05)
*P value calculated using Kruskal-Wallis test for closed and open voids respectively among the coronal, middle and apical 1/3 within each group

ISSN: 1472-6831