Effect of a denture cleanser on hardness, roughness and tensile bond strength of denture liners

  • Antônio de Luna Malheiros-Segundo University of São Paulo
  • Marina Xavier Pisani University of São Paulo
  • Helena de Freitas Oliveira Paranhos
  • Raphael Freitas de Souza University of São Paulo
Keywords: Acrylic resins, Denture liners, Denture cleanser, Properties

Abstract

Aim: This study aim to investigate the effect of a denture cleanser on hardness, roughness and tensile bond strength of a rigid (Kooliner) and a soft denture liner (Elite Soft) after 7, 60 and 120 days of immersion. Methods: Thirty circular and twenty rectangular specimens of each material were randomly distributed in two groups: control - immersion in artificial saliva at 37°C; and experimental - immersion in artificial saliva at 37ºC combined with immersion in the cleanser for 5 min. Hardness was measured using either a Vickers or Shore A hardness tester, and a surface roughness tester was used to measure the surface roughness. Tensile bond strength was carried out on a universal testing machine. Data were analyzed statistically by ANOVA or Kruskal-Wallis test (α=0.05). Results: No significant difference was found between the groups for the tested properties (p>0.05). There was an increase in the hardness of both materials after 60 days (p>0.05). No difference between the immersion periods was found for the roughness of Kooliner (p>0.05), although the roughness of Elite Soft decreased after 120 days in both groups (p>0.05). Kooliner presented higher tensile bond strength than Elite Soft (p>0.05). Conclusions: Both materials showed alterations on the tested properties during the experimental period, but these changes were not promoted by the denture cleanser.

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Author Biographies

Antônio de Luna Malheiros-Segundo, University of São Paulo
DDS, MS, PhD Student. Department of Dental Materials and Prosthodontics, Dental School of Ribeirão Preto
Marina Xavier Pisani, University of São Paulo
DDS, Graduate Student. Department of Dental Materials and Prosthodontics, Dental School of Ribeirão Preto, University of São Paulo
Helena de Freitas Oliveira Paranhos
DDS, MS, PhD, Associated Professor
Raphael Freitas de Souza, University of São Paulo
DDS, MS, PhD, Assistent Professor Department of Dental Materials and Prosthodontics, Dental School of Ribeirão Preto, University of São Paulo
Published
2008-10-01
How to Cite
Malheiros-Segundo, A. de L., Pisani, M. X., Paranhos, H. de F. O., & Souza, R. F. de. (2008). Effect of a denture cleanser on hardness, roughness and tensile bond strength of denture liners. Brazilian Journal of Oral Sciences, 7(26), 1596-1601. https://doi.org/10.20396/bjos.v7i26.8642808
Section
Article

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