Table 2 Mean Percentage of Volume (mean ± standard deviation) and of Covered Canal Surface Area of RFMs in different instrument groups.

From: Microcomputed tomographic analysis of the efficiency of two retreatment techniques in removing root canal filling materials from mandibular incisors

 

Round-canal

Oval-canal

PTN-MNiTiH

PTN-CL

PTN-MNiTiH

PTN-CL

Coronal 2/3 volume (%)

1.7 ± 1.4a

2.4 ± 0.95a

3.14 ± 3.2a

6.3 ± 1.6a

Apical volume (%)

3.7 ± 2.1b*

18.5 ± 3.8b*

7.6 ± 3.8b*

19.25 ± 4.8b*

Total volume (%)

4.5 ± 1.3*

9.1 ± 4.7*

16.8 ± 5.5*

21.2 ± 7.5*

Coronal 2/3 area (%)

6.6 ± 4.7#

8.6 ± 1.9#

11.7 ± 8.9#

24.5 ± 7.9#

Apical area (%)

7.4 ± 3.2#

10.7 ± 3.1#

17.6 ± 9.2#

26.8 ± 4.7#

Total area (%)

9.2 ± 2.6#

14.5 ± 3.5#

15.9 ± 4.2#

22 ± 2.7#

  1. Different superscript lowercase letters indicate a significant difference considering each group in the three-thirds of the teeth (independent-samples t test, P < 0.05).
  2. *indicates a significant difference between different instrument groups of the volume of RFMs (independent-samples t test, P < 0.05).
  3. #indicates a significant difference (P < 0.05) between different instrument groups of the covered canal surface area of RFMs (independent-samples t test, P < 0.05).
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