Abstract
BackgroundIt is unknown whether the bioactivity of Biodentine characterized by the precipitation of hydroxyapatite and formation of tags into the dentinal tubules improve its sealing ability as an apical plug. Aim: To evaluate the sealing ability provided by Biodentine and mineral trioxide aggregate (MTA) apical plugs, with or without phosphate-buffered saline (PBS) intracanal dressing, using a glucose leakage method.Material and MethodsThe space of the canal of 100 root segments with about 12 mm long was shaped using Gates-Glidden. After created an apical retrograde cavity, the root segments were randomly divided into 4 groups (n = 25): G1 – Biodentine; G2 - Biodentine + PBS intracanal dressing; G3 - MTA and G4 - MTA + PBS intracanal dressing. All access openings were filled with temporary cement and all root segments were introduced in floral foams moistened with PBS. After 2 months, all root segments were prepared to evaluate the glucose leakage. The amount of glucose leakage was quantified by a spectrophotometer and the data were analyzed using chi-square test (p<0.05).ResultsTraces of the glucose were observed in a higher of samples that received Biodentine apical plug (p<0.05). The exposure to intracanal PBS did not influence the sealing provided by Biodentine and MTA.ConclusionsThe Biodentine had lower sealing ability than MTA. The interaction with PBS intracanal dressing did not improve the sealing ability provided by sealers. Key words:Apexification, dental cements, dental leakage, glucose, pressure.
Highlights
Mineral trioxide aggregate (MTA) has been used as apical plug in non-vital teeth with incompletely formed roots [1,2]
The marginal sealing provided by mineral trioxide aggregate (MTA) is better compared to other materials [3,4], and ex vivo studies have demonstrated improvement when the cement remains in contact with the phosphate buffered saline (PBS) [5,6] due to the formation of carbonate apatite at the cement-dentin interface [7], with tag-like structures which partially obliterates the spaces between material and dentin [5]
Previous studies demonstrated that phosphate-buffered saline (PBS) positively influences the sealing provided by MTA [5,6], due to the formation of carbonate apatite at the cement-dentin interface [7], which partially obliterates the spaces between material and dentin [5]
Summary
Mineral trioxide aggregate (MTA) has been used as apical plug in non-vital teeth with incompletely formed roots [1,2]. Similar to MTA, its bioactivity has been evidenced by the precipitation of hydroxyapatite [9] and formation of tags that penetrate into the dentinal tubules [10,11] It is not known whether the sealing ability of Biodentine when used as an apical plug may be improved after interaction with PBS. This study evaluated the sealing ability provided by Biodentine and MTA apical plugs, with or without phosphate-buffered saline (PBS) intracanal dressing, using a glucose leakage method. Aim: To evaluate the sealing ability provided by Biodentine and mineral trioxide aggregate (MTA) apical plugs, with or without phosphate-buffered saline (PBS) intracanal dressing, using a glucose leakage method. The interaction with PBS intracanal dressing did not improve the sealing ability provided by sealers
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