Hot air stream reduces cytotoxicity of light-cured calcium hydroxide based cements

• Celso-Afonso Klein-Junior ^[1] ; Roberto Zimmer ^[1] ; Diana-Lina-Bronca Borghetti ^[1] ; Fernando-Freitas Portella ^[4] ; Flávia-Carolina Abich ^[1] ; Daniel-Rodrigo Marinowic ^[2] ; Keiichi Hosaka ^[3] ; Eduardo-Galia Reston ^[1]
  1. [1] Universidade Luterana do Brasil

     Universidade Luterana do Brasil

     Brasil

     
  2. [2] Pontifícia Universidade Católica do Rio Grande do Sul

     Pontifícia Universidade Católica do Rio Grande do Sul

     Brasil

     
  3. [3] Tokyo Medical and Dental University

     Tokyo Medical and Dental University

     Japón

     
  4. [4] Institute of Health Sciences, Universidade Feevale, ERS-239 2755, Novo Hamburgo, Rio Grande do Sul, Brazil

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• Localización: Journal of Clinical and Experimental Dentistry, ISSN-e 1989-5488, Vol. 12, Nº. 3 (March), 2020, págs. 215-219
• Idioma: inglés
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• Resumen

  • The light-cured calcium hydroxide based cements have incomplete polymerization and unconverted monomers can cause pulp cell damage. The aim of this study was to evaluate the influence of a warm and hot air stream on the cytotoxicity of light-cured calcium hydroxide based cements.

    The materials Dycal (conventional cement), Biocal, Hidrox-Cal, and Ultra-Blend Plus (light-cured calcium hydroxide cements) were submitted to cytotoxicity analysis after polymerization, without vs. with previous heat treatment with a warm (37°C) and a hot (60°C) air stream. Following polymerization, cements were maintained in culture medium for 24 hours and 7 days, and subjected to the MTT test. Data were analyzed using analysis of variance (ANOVA) followed by post-hoc Student-Newman-Keuls (<0.05).

    The results indicated significant differences between the materials according to their composition, i.e., light-cured cements treated with a jet of warm air showed similar cytotoxicity levels to those observed for conventional cement, suggesting that they may be considered alternatives in cases requiring pulp-capping treatment.

    Application of a hot air stream reduced cytotoxicity of materials tested.