Restor Dent Endod.  2017 Feb;42(1):19-26. 10.5395/rde.2017.42.1.19.

Retreatability of two endodontic sealers, EndoSequence BC Sealer and AH Plus: a micro-computed tomographic comparison

Affiliations
  • 1Department of Endodontics, University of Washington, Seattle, WA, USA. avina@uw.edu
  • 2Department of Pediatrics (Craniofacial Medicine), University of Washington, Seattle, WA, USA.
  • 3Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA, USA.
  • 4Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia.

Abstract


OBJECTIVES
Recently, bioceramic sealers like EndoSequence BC Sealer (BC Sealer) have been introduced and are being used in endodontic practice. However, this sealer has limited research related to its retreatability. Hence, the aim of this study was to evaluate the retreatability of two sealers, BC Sealer as compared with AH Plus using micro-computed tomographic (micro-CT) analysis.
MATERIALS AND METHODS
Fifty-six extracted human maxillary incisors were instrumented and randomly divided into 4 groups of 14 teeth: 1A, gutta-percha, AH Plus retreated with chloroform; 1B, gutta-percha, AH Plus retreated without chloroform; 2A, gutta-percha, EndoSequence BC Sealer retreated with chloroform; 2B, gutta-percha, EndoSequence BC Sealer retreated without chloroform. Micro-CT scans were taken before and after obturation and retreatment and analyzed for the volume of residual material. The specimens were longitudinally sectioned and digitized images were taken with the dental operating microscope. Data was analyzed using an ANOVA and a post-hoc Tukey test. Fisher exact tests were performed to analyze the ability to regain patency.
RESULTS
There was significantly less residual root canal filling material in the AH Plus groups retreated with chloroform as compared to the others. The BC Sealer samples retreated with chloroform had better results than those retreated without chloroform. Furthermore, patency could be re-established in only 14% of teeth in the BC Sealer without chloroform group.
CONCLUSION
The results of this study demonstrate that the BC Sealer group had significantly more residual filling material than the AH Plus group regardless of whether or not both sealers were retreated with chloroform.

Keyword

AH Plus; BC Sealer; Chloroform; Endodontic sealers; Micro-CT; Retreatability

MeSH Terms

Chloroform
Dental Pulp Cavity
Gutta-Percha
Humans
Incisor
Retreatment
Tooth
Chloroform
Gutta-Percha

Figure

  • Figure 1 Visualization of residual sealer after retreatment. Micro-CT scans of obturated canals with (a) gutta-percha and AH Plus retreated with chloroform; (b) gutta-percha and AH Plus retreated without chloroform; (c) gutta-percha and BC Sealer retreated with chloroform; (d) gutta-percha and BC Sealer retreated without chloroform retreatment. The left-most images are representative 3D renderings of the filled canals, while the adjacent images are the same teeth following retreatment. Black, root surface; white and orange, obturation material. The right-most images are the corresponding longitudinal sections of these teeth. Micro-CT, micro-computed tomography; BC Sealer, EndoSequence BC Sealer (Brasseler USA, Savannah, GA, USA); 3D, 3 dimensional.

  • Figure 2 Percentage of residual filling material in the entire length of root canal. The differences in the percentage of residual root canal filling were statistically significant between the AH Plus with chloroform and the other groups (*p ≤ 0.05). The BC Sealer with chloroform group was significantly different from the BC Sealer without chloroform group (**p ≤ 0.05). BC Sealer, EndoSequence BC Sealer (Brasseler USA, Savannah, GA, USA).

  • Figure 3 Percentage of residual filling material of apical third compared with middle and coronal third of canals. The differences in the percentage of residual root canal filling were statistically significant between the AH Plus with chloroform and the other groups (**p ≤ 0.05) and between the BC Sealer group retreated with chloroform and the AH Plus and BC Sealer groups that were not retreated with chloroform (*p ≤ 0.05). BC Sealer, EndoSequence BC Sealer (Brasseler USA, Savannah, GA, USA).


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Restor Dent Endod. 2019;44(2):.    doi: 10.5395/rde.2019.44.e18.

Efficacy of retreatment NiTi files for root canals filled with calcium silicate-based sealer
Jae-Yun Hyun, Kyung-Mo Cho, Se-Hee Park, Yoon Lee, Yoon-Joo Lee, Jin-Woo Kim
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