Effect of calcium hydroxide dressing on push-out bond strength of endodontic sealers to root canal dentin
Autor: | Milton Carlos Kuga, Flávia Angélica Guiotti, Arnaldo Sant'Anna Júnior, Gisele Faria, Marco Antonio Hungaro Duarte |
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Přispěvatelé: | Univ. Estadual Paulista Araraquara Dental School Department of Restorative Dentistry, Universidade de São Paulo (USP) |
Rok vydání: | 2014 |
Předmět: |
medicine.medical_specialty
Time Factors Surface Properties Root canal Dentistry Endodontics Calcium Hydroxide Root Canal Filling Materials chemistry.chemical_compound MTA-Fillapex Push out Reference Values Materials Testing Dentin medicine Humans General Materials Science Dental Restoration Failure Aluminum Compounds Analysis of Variance Calcium hydroxide Epoxy Resins Bond strength business.industry Silicates Bone Cements Dental Bonding Reproducibility of Results Oxides Calcium Compounds Salicylates lcsh:RK1-715 Drug Combinations SELANTES DE FOSSAS E FISSURAS medicine.anatomical_structure chemistry lcsh:Dentistry Reference values Dental Pulp Cavity business Root Canal Preparation |
Zdroj: | Brazilian Oral Research, Volume: 28, Issue: 1, Pages: 1-6, Published: 24 JAN 2014 Brazilian Oral Research v.28 n.1 2014 Brazilian Oral Research Sociedade Brasileira de Pesquisa Odontológica (SBPqO) instacron:SBPQO Scopus-Elsevier SciELO Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Brazilian Oral Research, Vol 28, Iss 1, Pp 1-7 (2014) |
ISSN: | 1807-3107 1806-8324 |
Popis: | Made available in DSpace on 2015-08-06T16:14:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-01-24. Added 1 bitstream(s) on 2015-08-06T16:44:25Z : No. of bitstreams: 1 S1806-83242014000100204.pdf: 317262 bytes, checksum: e4dcb4d3e8d4a7d0f7b84170b5fa5780 (MD5) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) The aim of the present study was to evaluate the effect of calcium hydroxide dressing on the bond strength of three commercially available endodontic sealers (MTA Fillapex, Sealapex, and AH Plus) to root canal dentin. Sixty slices of extracted human canines were obtained from cervical, middle, and apical root thirds. Root canals were standardized and specimens were filled and divided into six groups (n = 10): G1, MTA Fillapex; G2, Sealapex; and G3, AH Plus, with prior application of calcium hydroxide dressing; and G4, G5 and G6, without prior application of intracanal dressing. After 7 days, specimens were submitted to a push-out test. The data obtained were analyzed using the ANOVA and Tukey tests (a = 5%). Fracture modes were classified as adhesive, cohesive or mixed. The results of sealer bond strength to root canal dentin varied according to the sealer, root third and prior dressing application. Overall, calcium hydroxide dressing reduced bond strength in all root thirds, but the reduction was significant only for AH Plus, at the cervical (3.25 ± 1.69) and apical (4.43 ± 1.65) thirds (p < 0.05). AH Plus showed the highest bond strength for all root thirds (p < 0.05) compared to the other groups. G1, G2, G4 and G5 showed similar bond strength values for all root thirds (p > 0.05). In conclusion, the calcium hydroxide dressing only had a negative effect on the bond strength of AH Plus, at the cervical and apical thirds. On the other hand, the bond strength values for MTA Fillapex and Sealapex were lower than those for AH Plus and, whereas the mixed failure mode predominated for AH Plus, the adhesive failure mode predominated for MTA Fillapex and Sealapex. Univ. Estadual Paulista Araraquara Dental School Department of Restorative Dentistry Universidade de São Paulo Bauru Dental School Department of Dentistry, Endodontics and Dental Materials |
Databáze: | OpenAIRE |
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