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Marginal integrity and physicomechanical properties of a thermoviscous and regular bulk-fill resin composites.
Soares, Bárbara Monteiro; Barbosa, Marianna Pires; de Almeida, Rayane Velloso; Jardim, Renata Nunes; da Silva, Eduardo Moreira.
Afiliação
  • Soares BM; Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.
  • Barbosa MP; Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.
  • de Almeida RV; Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.
  • Jardim RN; Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.
  • da Silva EM; Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil. em_silva@id.uff.br.
Clin Oral Investig ; 28(9): 496, 2024 Aug 23.
Article em En | MEDLINE | ID: mdl-39177835
ABSTRACT

OBJECTIVES:

To evaluate the marginal integrity (MI%) and to characterize specific properties of a thermoviscous bulk-fill resin composite, two regular bulk-fill resin composites, and a non-bulk-fill resin composite. MATERIALS AND

METHODS:

VisCalor bulk (VBF), Filtek One Bulk Fill (OBF), and Aura Bulk Fill (ABF) were evaluated. Filtek Z250 XT (ZXT) was used as non-bulk-fill control. MI% was evaluated in standardized cylindrical cavities restored with the composites by using a 3D laser confocal microscope. The following properties were characterized volumetric polymerization shrinkage (VS%), polymerization shrinkage stress (Pss), degree of conversion (DC%), microhardness (KHN), flexural strength (FS), and elastic modulus (EM). Data were analyzed by one-way and two-way ANOVA, and Tukey HSD post-hoc test (α = 0.05).

RESULTS:

VBF presented the highest MI% and the lowest VS% and Pss (p < 0.05). DC% ranged from 59.4% (OBF) to 71.0% (ZXT). ZXT and VBF presented similar and highest KHN than OBF and ABF (p < 0.05). ABF presented the lowest FS (p < 0.05). EM ranged from 5.5 GPa to 7.7 GPa, with the values of ZXT and VBF being similar and statistically higher than those of OBF and ABF (p < 0.05).

CONCLUSIONS:

Thermoviscous technology employed by VisCalor bulk was able to improve its mechanical behavior comparatively to regular bulk-fill resin composites and to contribute to a better marginal integrity in restorations built up in cylindrical cavities with similar geometry to a class I cavity as well. Although presenting overall better physicomechanical properties, Z250 XT presented the worst MI%. CLINICAL RELEVANCE The marginal integrity, which is pivotal for the success of resin composite restorations, could be improved using VisCalor bulk-fill. The worst MI% presented by Z250 XT reinforces that non-bulk-fill resin composites shall not be bulk-inserted in the cavity to be restored.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Propriedades de Superfície / Teste de Materiais / Adaptação Marginal Dentária / Resinas Compostas / Módulo de Elasticidade / Polimerização / Resistência à Flexão Idioma: En Revista: Clin Oral Investig Assunto da revista: ODONTOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Propriedades de Superfície / Teste de Materiais / Adaptação Marginal Dentária / Resinas Compostas / Módulo de Elasticidade / Polimerização / Resistência à Flexão Idioma: En Revista: Clin Oral Investig Assunto da revista: ODONTOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha