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Table 1 Volumetric Percentages of Voids (meanā€‰Ā±ā€‰SD) in Different Groups

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

Filling Method

Group

Taper

Needle Type

Volume of Voids (%)

P value*

Overall

Coronal

Middle

Apical

SOI

A

0.06

commercial

29.68ā€‰Ā±ā€‰7.926a

11.04ā€‰Ā±ā€‰10.230A

40.01ā€‰Ā±ā€‰18.256a, B

72.53ā€‰Ā±ā€‰20.797a, C

0.002

B

0.06

modified

10.60ā€‰Ā±ā€‰4.760a

12.31ā€‰Ā±ā€‰4.938A

9.50ā€‰Ā±ā€‰7.169a, A

9.06ā€‰Ā±ā€‰9.004a, A

0.587

C

0.04

commercial

25.37ā€‰Ā±ā€‰12.852b

4.95ā€‰Ā±ā€‰5.012A

32.01ā€‰Ā±ā€‰36.296B

76.89ā€‰Ā±ā€‰38.317b, C

0.049

D

0.04

modified

9.30ā€‰Ā±ā€‰5.132b

5.63ā€‰Ā±ā€‰6.852A

9.66ā€‰Ā±ā€‰7.475A

18.61ā€‰Ā±ā€‰21.374b, A

0.296

SCO

E

0.06

commercial

2.04ā€‰Ā±ā€‰0.761c

1.61ā€‰Ā±ā€‰0.596c, A

1.71ā€‰Ā±ā€‰2.116A

4.96ā€‰Ā±ā€‰2.163c, B

0.019

F

0.06

modified

0.26ā€‰Ā±ā€‰0.302c

0.20ā€‰Ā±ā€‰0.311c, A

0.30ā€‰Ā±ā€‰0.685A

0.43ā€‰Ā±ā€‰0.557c, A

0.822

G

0.04

commercial

4.86ā€‰Ā±ā€‰3.015d

7.84ā€‰Ā±ā€‰8.358d, A

4.86ā€‰Ā±ā€‰3.920d, A

6.53ā€‰Ā±ā€‰4.399d, A

0.810

H

0.04

modified

0.46ā€‰Ā±ā€‰0.767d

0.81ā€‰Ā±ā€‰1.315d, A

0.06ā€‰Ā±ā€‰0.149d, A

0.17ā€‰Ā±ā€‰0.419d, A

0.587

  1. Same lowercase superscript letters in a column represent a statistical difference determined by Mann-Whitney test and Kruskal-Wallis test (Pā€‰<ā€‰0.05)
  2. Different uppercase superscript letters in a row represent a statistical difference determined by Kruskal-Wallis test (Pā€‰<ā€‰0.05)
  3. *P value calculated among the coronal, middle and apical 1/3 within each group