Development and characterization of a novel bulk-fill elastomeric temporary restorative composite

Authors

  • Sonia Luque Peralta Faculdade Metropolitana da Grande Fortaleza, Programa de Graduação em Odontologia https://orcid.org/0000-0002-5857-9321
  • André Lindemann Dutra Universidade Federal de Pelotas, Faculdade de Odontologia, Programa de Pós-Graduação em Odontologia
  • Sávio Bisinoto de Leles Universidade Federal de Pelotas, Faculdade de Odontologia
  • Juliana Silva Ribeiro Universidade Federal de Pelotas, Faculdade de Odontologia, Programa de Pós-Graduação em Odontologia https://orcid.org/0000-0002-6847-6262
  • Fabricio Aulo Ogliari Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico
  • Evandro Piva Universidade Federal de Pelotas, Faculdade de Odontologia, Programa de Pós-Graduação em Odontologia https://orcid.org/0000-0002-5970-5158
  • Rafael Guerra Lund Universidade Federal de Pelotas, Faculdade de Odontologia, Programa de Pós-Graduação em Odontologia https://orcid.org/0000-0003-1006-3809

DOI:

https://doi.org/10.1590/1678-7757-2018-0183

Keywords:

Temporary dental restoration, Zinc, Microbiology, Dental leakage

Abstract

Objectives: This study investigated the physical and mechanical properties, antibacterial effect and biocompatibility of novel elastomeric temporary resin-based filling materials (TFMs) containing zinc methacrylate (ZM). Material and Methods: Experimental TFMs were prepared by mixing the zinc methacrylate with monomer, co-monomer, photoinitiator and fillers. A ZM concentration of 0 (control), 0.5% (Z0.5); 1% (Z1), 2% (Z2), or 5% (ZM5) wt% was added to the TFMs. Fermit-N (F) was used for comparison with the experimental material. Microleakage, water sorption/solubility, degree of conversion, depth of cure, ultimate tensile strength, and hardness were determined and compared. A modified direct contact test (DCT) with Enterococcus faecalis and a Streptococcus mutans' biofilm accumulation assay was carried out to evaluate the antimicrobial effect and cytotoxicity of the assay. Statistical comparisons were performed (α=5%). Results: The results showed that the physical and mechanical properties of the experimental TFMs with ZM are comparable with the properties of the commercial reference and some properties were improved, such as lower microleakage and water sorption, and higher ultimate tensile strength values. TFMs with ZM killed E. faecalis only after 1 h. Biofilm development of S. mutans was not affected by the inclusion of ZM in the experimental TFMs. Conclusions: The present findings suggest that the physical, mechanical and biological properties of the experimental TFMs with ZM are comparable with the properties of the commercial reference. However, some properties were improved, such as lower microleakage and water sorption, and higher ultimate tensile strength values.

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Published

2019-05-29

Issue

Section

Original Articles