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. 2021 Sep 1;55(3):146-151.
doi: 10.26650/eor.2021922696.

The effects of final irrigants on the push-out bond strength of two calcium silicate-based root canal sealers: an in vitro study

Davut Celik  1 , Ayse Tuba Ozalp Koca  2 , Tugba Kosar  1 , Tamer Tasdemir  1
Affiliations

The effects of final irrigants on the push-out bond strength of two calcium silicate-based root canal sealers: an in vitro study

Davut Celik et al. Eur Oral Res. .

Abstract

Purpose: The purpose of the present study was to investigate the effect of the different irrigant combinations used in final irrigation on the push-out bond strength of root canal sealers that have different compositions.

Materials and methods: In total 60 dentinal slices in 1 mm thickness were collected from 15 extracted mandibular premolar teeth; 4 slices from each tooth. 3 canal-like artificial cavities were opened on each dentinal slice. Samples were divided into 4 experimental groups, each of which consisted of 15 samples. In group 1, samples were immersed in 5.25% NaOCl and 17% EDTA solutions respectively; in group 2, immersed in 5.25% NaOCl and 2% CHX solutions respectively; in group 3, immersed in 5.25% NaOCl, 17% EDTA and 2% CHX solutions respectively; and in group 4 immersed in distilled water. After drying with absorbent papers, each cavity in dentinal slice sample was filled with different sealer (Endoseal MTA, Tech Biosealer Endo or AH Plus). Two days later, the push-out bond examination was performed.

Results: AH Plus showed higher push-out bond strength value in two combinations (group 2 and 3) in which final irrigants contained CHX (p<0.001). Dentinal push-out bond strengths of root canal sealers from Endoseal MTA and Tech BioSealer Endo were not affected by final irrigant (p=0.965).

Conclusion: Using CHX after NaOCl in final irrigant increases push-out strength of epoxy resinbased sealer but, did not create any difference in dentinal push-out bond strength of calcium silicate-based sealers.

Keywords: Calcium silicate-based sealer; precipitate; pushout bond strength; chlorhexidine gluconate; root canal irrigants.

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Figures

Figure 1.
Figure 1.
1.0 mm thick slices were obtained from the roots and three canal-like cavities were opened on each slice.
Figure 2.
Figure 2.
Each cavity in the dentinal slices was filled with a different sealer.
Figure 3.
Figure 3.
Loading was performed on a universal testing machine at 0.5 mm/min speed until material dislocation occurred.
See this image and copyright information in PMC

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