Influence of chemical degradation and abrasion on surface properties of nanorestorative materials

Authors

  • Andréia Bolzan de Paula Universidade Estadual de Campinas
  • Roberta Caroline Bruschi Alonso Faculdade Anhanguera
  • Giovana Albamonte Spagnolo de Araújo Universidade Estadual de Campinas
  • Julia Puppin Rontani Universidade Estadual de Campinas
  • Lourenço Correr-Sobrinho Universidade Estadual de Campinas
  • Regina Maria Puppin-Rontani Universidade Estadual de Campinas

DOI:

https://doi.org/10.20396/bjos.v14i2.8640821

Keywords:

Nanotechnology, Tooth erosion, Tooth abrasion

Abstract

Aim: The aim of this in vitro study was to investigate the synergistic effect of chemical degradation (erosion) and three-body abrasion (mechanical degradation) on the surface roughness (Ra) and hardness (KHN) of two nanorestorative materials and two conventional materials. Methods: Discshaped specimens (5 mm in diameter, 2 mm thick) of Filtek Z350TM and TPH SpectrumTM composites and Ketac NanoTM and VitremerTM light-curing glass ionomer cements, nanomaterials and conventional materials were prepared according to the manufacturer’s instructions. After 24 h, polishing procedures were performed and initial measurements of Ra and KHN were taken in all specimens. The specimens were divided into 12 groups (n = 10) according to material and storage media: artificial saliva, orange juice, and Coca-Cola®. After 30 days of storage, the specimens were submitted to mechanical degradation and re-evaluated for Ra and KHN. Data were tested for significant differences by repeated-measure three-way ANOVA and Tukey’s tests (p<0.05). Results: Erosion and abrasion wear significantly decreased hardness of all materials. Only Filtek Z350 roughness, however, was not affected by erosion and abrasion. All materials showed a significant increase in surface roughness after erosion and abrasion, except for Filtek Z350. After chemical and mechanical degradation, the KHN of all samples had decreased significantly. After mechanical degradation, the acidic drinks (Coca-Cola® and orange juice) were more aggressive than artificial saliva to all materials. Conclusions: A synergistic effect was observed by the increase in roughness for all materials, except for Filtek Z350; hardness values decrease for all materials, regardless of whether they were nanofilled or not. The RMGICs were more susceptible to degradation than the composites, considering both hardness and roughness surface parameters.

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Author Biographies

Andréia Bolzan de Paula, Universidade Estadual de Campinas

Universidade Estadual de Campinas - Faculdade de Odontologia de Piracicaba - Departamento de Odontologia Restauradora

Roberta Caroline Bruschi Alonso, Faculdade Anhanguera

Faculdade Anhanguera, Faculdade de Odontologia , Área de Biomateriais

Giovana Albamonte Spagnolo de Araújo, Universidade Estadual de Campinas

Universidade Estadual de Campinas - Faculdade de Odontologia de Piracicaba - Departamento de Odontologia Restauradora

Julia Puppin Rontani, Universidade Estadual de Campinas

Universidade Estadual de Campinas - Faculdade de Odontologia de Piracicaba - Departamento de Odontologia Restauradora

Lourenço Correr-Sobrinho, Universidade Estadual de Campinas

Universidade Estadual de Campinas - Faculdade de Odontologia de Piracicaba - Departamento de Odontologia Restauradora

Regina Maria Puppin-Rontani, Universidade Estadual de Campinas

Universidade Estadual de Campinas - Faculdade de Odontologia de Piracicaba, Área de Odontopediatria

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Published

2015-09-30

How to Cite

1.
Paula AB de, Alonso RCB, Araújo GAS de, Rontani JP, Correr-Sobrinho L, Puppin-Rontani RM. Influence of chemical degradation and abrasion on surface properties of nanorestorative materials. Braz. J. Oral Sci. [Internet]. 2015 Sep. 30 [cited 2022 Dec. 9];14(2):100-5. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8640821

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