Micro Push-out Bond Strength and Bioactivity Analysis of a Bioceramic Root Canal Sealer.

Autor:	Carvalho CN; Dental School, CEUMA University, São Luís, Maranhão, Brazil., Grazziotin-Soares R; Discipline of Endodontics College of Dentistry University of Saskatchewan, SK, Canada., de Miranda Candeiro GT; Dental Sciences Post-graduation Program, Course of Dentistry, Universitary Center Christus, Fortaleza, Brazil., Gallego Martinez L; Center of Materials Science and Technology, Energy and Nuclear Research Institute (IPEN), São Paulo, Brazil., de Souza JP; Center of Materials Science and Technology, Energy and Nuclear Research Institute (IPEN), São Paulo, Brazil., Santos Oliveira P; Dental School, CEUMA University, São Luís, Maranhão, Brazil., Bauer J; Discipline of Dental Materials, School of Dentistry, Federal University of Maranhão (UFMA), São Luís, Maranhão, Brazil., Gavini G; Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, Brazil.
Jazyk:	angličtina
Zdroj:	Iranian endodontic journal [Iran Endod J] 2017 Summer; Vol. 12 (3), pp. 343-348.
DOI:	10.22037/iej.v12i3.16091
Abstrakt:	Introduction: Bioactive endodontic sealers have been developed to improve the quality of root canal obturation. EndoSequence Bioceramic (BC) Sealer is amongst calcium silicate-based materials recently developed for permanent root canal filling. The objective of this study was to evaluate the bioactivity of BC Sealer and its micro push-out bond strength to dentin compared to AH-Plus (AH) sealer. Methods and Materials: To perform the micro push-out test, 24 root canals of mandibular premolars were instrumented and divided into two groups ( n =12). Each root was cut into 4 slices and lumens of the canals were filled with the sealers and submitted to micro push-out test. Failure mode was assessed using scanning electron microscopy (SEM). Bioactivity of BC sealer was investigated with scanning electron microscopy/energy-dispersive X-ray (SEM/EDS) and X-ray diffraction (XRD). Bioactivity assessments were reported descriptively. Bond strength data were analyzed by parametric t -test ( α =5%). Results: In micro push-out test AH had higher bond strength mean values (16.29 MPa) than BC sealer (9.48 MPa) ( P <0.05). Both groups had low amount of adhesive failure. SEM showed the presence of a mineral precipitate after 30 days and EDS analysis showed that those precipitates have high proportion of Ca. XRD showed peaks of crystalline phases of calcium carbonate compatible with the bioactivity. Conclusion: BC sealer showed indications of bioactivity and lower bond strength to dentine compared to AH. Competing Interests: ‘None declared’.
Databáze:	MEDLINE
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