Dentin µTBS and hardness of bulk-fill and conventional composites placed in a box-shaped cavity preparation

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dc.creatorFrancisca Daniele Jardilino Silami
dc.creatorGizele de Pádua Geraldeli
dc.creatorMario Alexandre Coelho Sinhoreti
dc.creatorFernanda de Carvalho Panzeri Pires-de-Souza
dc.creatorJean Francois Roulet
dc.creatorSaulo Geraldeli
dc.date.accessioned2025-06-18T21:19:46Z
dc.date.accessioned2025-09-08T23:29:24Z
dc.date.available2025-06-18T21:19:46Z
dc.date.issued2017-12-19
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.3290/j.jad.a39276
dc.identifier.issn1757-9988
dc.identifier.urihttps://hdl.handle.net/1843/83032
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofThe Journal of Adhesive Dentistry
dc.rightsAcesso Restrito
dc.subjectHardness
dc.subjectTraction
dc.subjectTensile strength
dc.subjectDentin
dc.titleDentin µTBS and hardness of bulk-fill and conventional composites placed in a box-shaped cavity preparation
dc.typeArtigo de periódico
local.citation.epage400
local.citation.spage395
local.citation.volume19
local.description.resumoPurpose: To compare the dentin microtensile bond strength (µTBS) and the Knoop hardness of bulk-fill and conventional restorative composites in box-shaped Class I cavities using different insertion techniques. Materials and methods: Forty box-shaped Class I preparatons 4 mm deep were performed in the pulp chamber of sound human third molars. The restorations were made using either a conventional microhybrid (Z250, 3M ESPE) or bulk-fill (Tetric EvoCeram Bulk-fill, TCBF) composite using two incremental thicknesses: 2 mm or 4 mm (n = 10). After 24-h water storage, the restorations were sectioned. The first slice (0.7 mm thick) taken from a proximal surface was submitted to the Knoop hardness (KHN) test at five depths from the occlusal cavosurface to the pulpal line angle. Sticks were fabricated from the remaining sections and tested for dentin microtensile bond strength (µTBS). Means were analyzed using two-way ANOVA and Tukey's test (p < 0.05). Results: Higher (p < 0.05) µTBS resulted when both composites were restored with 2-mm increments, with no significant difference between materials (p > 0.05). Higher (p < 0.05) KHN means were found when 2-mm increments were used, with no significant differences (p > 0.05) between the materials. When the teeth were restored with one bulk increment (4 mm), the deeper layers presented lower KHN means (p < 0.05) starting at 2 mm for Z250 and 3 mm for TCBF. Conclusion: The 2-mm increment restorations in box-shaped cavities yielded higher µTBS and microhardness for conventional and bulk-fill composites.
local.identifier.orcidhttps://orcid.org/0000-0003-4212-5322
local.identifier.orcidhttps://orcid.org/0000-0002-1932-2902
local.identifier.orcidhttps://orcid.org/0000-0002-1455-1538
local.identifier.orcidhttps://orcid.org/0000-0002-3929-6027
local.identifier.orcidhttps://orcid.org/0000-0001-7837-5599
local.publisher.countryBrasil
local.publisher.departmentFAO - DEPARTAMENTO DE CLÍNICA
local.publisher.departmentFAO - DEPARTAMENTO DE ODONTOLOGIA RESTAURADORA
local.publisher.initialsUFMG
local.url.externahttps://www.quintessence-publishing.com/deu/en/article/843374

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