Restor Dent Endod.  2020 May;45(2):e18. 10.5395/rde.2020.45.e18.

A micro-computed tomographic evaluation of root canal filling with a single gutta-percha cone and calcium silicate sealer

• Kim JC
• Moe MMK
• Kim SK

• KMID: 2503513
• DOI: http://doi.org/10.5395/rde.2020.45.e18

Abstract

Objectives
The purpose of this study was to evaluate the void of root canal filling over time when a calcium silicate sealer was used in the single gutta-percha cone technique.
Materials and Methods
Twenty-four J-shaped simulated root canals and twenty-four palatal root canals from extracted human maxillary molars were instrumented with ProFile Ni-Ti rotary instruments up to size 35/0.06 or size 40/0.06, respectively. Half of the canals were filled with Endoseal MTA and the other half were with AH Plus Jet using the single gutta-percha cone technique. Immediately after and 4 weeks after the root canal filling, the samples were scanned using micro-computed tomography at a resolution of 12.8 μm. The scanned images were reconstructed using the NRecon software and the void percentages were calculated using the CTan software, and statistically analyzed by 1-way analysis of variance, paired t-test and Tukey post hoc test.
Results
After 4 weeks, there were no significant changes in the void percentages at all levels in both material groups (p > 0.05), except at the apical level of the AH Plus Jet group (p < 0.05) in the simulated root canal showing more void percentage compared to other groups. Immediately after filling the extracted human root canals, the Endoseal MTA group showed significantly less void percentage compared to the AH Plus Jet group (p < 0.05).
Conclusions
Under the limitations of this study, the Endoseal MTA does not seem to reduce the voids over time.

Keyword

Endodontics; Canal filling; Gutta-percha; Calcium silicate sealer; Micro computed tomography

Figure

• 

  Figure 1 A sample of simulated root canal filled with Endoseal MTA sealer and single gutta-percha cone (A). Scanned images at the red line level of the left sample immediately after (B) and 4 weeks after (C) canal filling. Void of the first scan (B) is seen as blue, and void of the second scan (C) is seen as red in the left 3-dimensional modeling image.

• 

  Figure 2 A sample of extracted human root canal filled with Endoseal MTA sealer and a single gutta-percha cone (A). Scanned images at the red line level of the left sample immediately after (B) and 4 weeks after (C) canal filling. Void of the first scan (B) is seen as blue, and void of the second scan (C) is seen as red in the left 3-dimensional modeling image.

• 

  Figure 3 A sample of extracted human root canal filled with AH Plus Jet sealer and single gutta-percha cone. (A). Scanned images at the red line level of the left sample immediately after (B) and 4 weeks after (C) canal filling. Void of the first scan (B) is seen as blue, and void of the second scan (C) is seen as red in the left 3-dimensional modeling image. The increase of void at apical area and loss of sealer can be seen at the right image a second scan (C). It is also seen at the red lines on the upper side of this image (shadow projection).

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