Potential tooth staining due to root canal sealers containing bismuth oxide and formaldehyde

Author(s)

Marciano, Marina Angelica ^[1] ; Camilleri, Josette ^[2] ; Lia Mondelli, Rafael Francisco ^[1] ; Amoroso, Pablo Andres ^[1] ; Cavenago, Bruno Cavalini ^[1] ; Perochena, Aldo del Carpio ^[1] ; Hungaro Duarte, Marco Antonio ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Restorat Dent Dent Mat & Endodont, Fac Dent Surg, Sao Paulo - Brazil

^[2] Univ Malta, Dept Restorat Dent, Msida - Malta

• Document type: Journal article
• Source: ENDO-ENDODONTIC PRACTICE TODAY; v. 9, n. 1, p. 39-45, SPR 2015.
• Web of Science Citations: 0

Abstract

Aim: To evaluate potential tooth colour alteration effect of five root canal sealers using a bovine tooth model and the interaction of formaldehyde with bismuth compounds. Materials and methods: A preliminary test was performed to assess the interaction of bismuth oxide in contact with formaldehyde. Seventy bovine teeth were sectioned into blocks and cavities were created. Each cavity was filled with either: AH Plus, Acroseal, MTA Fillapex, Sealer 26, Endofill and then sealed with composite. Triple antibiotic paste and unfilled samples were used as the positive and negative controls, respectively. All the specimens were immersed in water. The colour was assessed with a spectrophotometer at different intervals: immediately after filling, 24 h, 15 days and 30 days after filling. The colour change and the luminosity were calculated. The statistical analysis was performed using non-parametric Kruskal-Wallis and Dunn test (P < 0.05). Results: The bismuth oxide in contact with formaldehyde exhibited a black colour. All the sealers caused tooth colour alteration after the evaluated periods, with grey staining and low luminosity values observed with Sealer 26 samples. Conclusions: All the evaluated sealers caused tooth colour alteration. The tooth staining was visually detected for Sealer 26 and might be associated with the formaldehyde released and its interaction with the radiopacifier bismuth oxide. (AU)

• FAPESP's process: 11/13573-3 - Physicochemical and biological properties of experimental Portland-based sealer containing different radiopacifying agents
• Grantee: Marina Angélica Marciano da Silva
• Support type: Scholarships in Brazil - Doctorate
• FAPESP's process: 13/04054-8 - Analysis of the dental discoloration with MTA and Portland cement using a bovine dental model
• Grantee: Marina Angélica Marciano da Silva
• Support type: Scholarships abroad - Research Internship - Doctorate