Correlation between marginal accuracy and fracture resistance of indirect composite restorations varying cavity preparation design

Authors

  • Rodrigo Borges Fonseca Federal University of Uberlândia
  • Hugo Lemes Carlo Federal University of Uberlândia
  • Alfredo Júlio Fernandes Fernandes Neto Federal University of Uberlândia
  • Carlos José Soares Federal University of Uberlândia

DOI:

https://doi.org/10.20396/bjos.v6i20.8642960

Keywords:

Fracture resistance. Marginal accuracy. Morrelation. Composite inlays/ onlays

Abstract

This study evaluated the correlation between marginal accuracy and fracture resistance of laboratory-processed resin composite (LPRC) restorations with different cavity preparation designs. Eighty human third mandibular molars were selected and divided into 8 groups (n=10): G1 – conservative (-c) inlay; G2 – extensive (-e) inlay; G3 – onlay-c with mesio-buccal cusp coverage (CC); G4 – onlay-e with mesiobuccal CC; G5 – onlay-c with buccal CC; G6 – onlay-e with buccal CC; G7 – onlay-c with total CC; G8 – onlay-e with total CC. Indirect composite restorations (SR Adoro, Ivoclar-Vivadent) were manufactured and positioned over each respective preparation. Marginal accuracy was assessed using a stereomicroscope at 3 points on buccal, lingual, mesial and distal regions (40x magnification). After adhesive cementation (Adper Single Bond 2 and Rely-X ARC, 3M ESPE) a load compressive test (0.5mm/minute) was performed. Data were recorded in mm (marginal accuracy) and Kgf (fracture resistance). In general, Pearson correlation coefficient (a=0.05) did not show significance between factors in study (r=0.073; p=0.520) but it showed significance only on G6 (r=0.702; p=0.024). Irrespective of the preparation design it seems difficult to state the clear correlation between marginal accuracy and fracture resistance of LPRC restored teeth. In this study the effect of one variable on another was negligible

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Author Biographies

Rodrigo Borges Fonseca, Federal University of Uberlândia

Professor Adjunto DE, Coordenador de Pesquisa da FO-UFG, Líder da Rede Goiana de Pesquisa em Biologia Oral, Biomateriais, Biomecânica e Ensaios Clínicos em Odontologia. Vice-coordenador do Programa de Mestrado em Odontologia da UFG (2012-2014)

Hugo Lemes Carlo, Federal University of Uberlândia

 Graduação em Odontologia pela Faculdade de Odontologia da Universidade Federal de Uberlândia/UFU (1996/2000)
- Especialização em Dentística Restauradora pela Faculdade de Odontologia da Universidade Federal de Uberlândia/UFU (2001/2002)
- Mestrado em Dentística Restauradora pela Faculdade de Odontologia de Araraquara - Universidade Estadual Paulista Júlio de Mesquita Filho/UNESP (2003/2004)
- Doutorado em Materiais Dentários pela Faculdade de Odontologia de Piracicaba - Universidade Estadual de Campinas/UNICAMP (2004/2008)

Alfredo Júlio Fernandes Fernandes Neto, Federal University of Uberlândia

Alfredo Julio Fernandes Neto, Concluiu Graduação em Odontologia pela Universidade Federal de Uberlândia - UFU em 1975, Mestrado em Odontologia (Reabilitação Oral) pela Faculdade de Odontologia de Bauru da Universidade de São Paulo em 1982, Doutorado em Odontologia (Reabilitação Oral) pela Faculdade de Odontologia de Ribeirão Preto da Universidade de São Paulo em 1996. 

Carlos José Soares, Federal University of Uberlândia

Professor Adjunto 3 da Faculdade de Odontologia da UFU, atualmente exerce o cargo de Coordenador de Área da Odontologia na CAPES e é membro da Câmara da Saúde na FAPEMIG. Fellow da Academy of Dental Materials ? ADM. Possui graduação em Odontologia pela Universidade Federal de Uberlândia - UFU (1991), Especialização em Dentística pela UFU (1994), mestrado em Clínica Odontológica - Área de Dentística pela Faculdade de Odontologia de Piracicaba, Universidade Estadual de Campinas - FOP/UNICAMP (2000) e doutorado em Clínica Odontológica - Área de Dentística pela FOP/UNICAMP (2003), Pos-Doutorado na University of Minnesota (2009) no desenvolvimento de modelos de elementos finitos em multi-escala.

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Published

2016-01-20

How to Cite

1.
Fonseca RB, Carlo HL, Fernandes Neto AJF, Soares CJ. Correlation between marginal accuracy and fracture resistance of indirect composite restorations varying cavity preparation design. Braz. J. Oral Sci. [Internet]. 2016 Jan. 20 [cited 2023 Feb. 5];6(20):1260-4. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642960

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