Influence of plaster drying on the amount of residual monomer in heat-cured acrylic resins

Authors

  • Tarcisio José de Arruda Paes-Junior UNESP
  • Rodrigo Furtado de Carvalho UNESP
  • Sâmia Carolina Mota Cavalcanti UNESP
  • Guilherme de Siqueira Ferreira Anzaloni Saavedra UNESP
  • Alexandre Luiz Souto Borges UNESP

DOI:

https://doi.org/10.20396/bjos.v12i2.8641063

Keywords:

Acrylic resins, Polymers, Chromatography, Laboratory research

Abstract

Aim: To evaluate the influence of plaster condition, dry or not, on the amount of residual monomer in heat-cured acrylic resin. Methods: Thirty acrylic resin specimens (65x10x3 mm) were fabricated and randomly assigned to 5 groups (n=6). The evaluated resins were heat-cured acrylic resins by conventional or microwave polymerization techniques and the plaster was previously dried in microwave oven in two groups. Each specimen was individually immersed in a test tube containing methanol (7 days) for surface analysis. In the groups for which internal monomer was evaluated, the specimens were fragmented and the small fragments were weighed prior to immersion in methanol. The analysis was made by high performance liquid chromatography (HPLC). Data were analyzed by ANOVA and Tukey test (p<5%) Results: showed statistical differences among the groups. Conclusions: The previous plaster drying influenced the residual monomer amount showing a decrease of these levels.

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Author Biographies

Tarcisio José de Arruda Paes-Junior, UNESP

Department of Dental Materials and Prosthodontics, School of Dentistry, Institute of Science and Technology, UNESP – Univ. Estadual Paulista, São José dos Campos, SP.

Rodrigo Furtado de Carvalho, UNESP

Department of Dental Materials and Prosthodontics, School of Dentistry, Institute of Science and Technology, UNESP – Univ. Estadual Paulista, São José dos Campos, SP.

Sâmia Carolina Mota Cavalcanti, UNESP

Department of Dental Materials and Prosthodontics, School of Dentistry, Institute of Science and Technology, UNESP – Univ. Estadual Paulista, São José dos Campos, SP.

Guilherme de Siqueira Ferreira Anzaloni Saavedra, UNESP

Department of Dental Materials and Prosthodontics, School of Dentistry, Institute of Science and Technology, UNESP – Univ. Estadual Paulista, São José dos Campos, SP.

Alexandre Luiz Souto Borges, UNESP

Department of Dental Materials and Prosthodontics, School of Dentistry, Institute of Science and Technology, UNESP – Univ. Estadual Paulista, São José dos Campos, SP.

Published

2015-10-16

How to Cite

1.
Paes-Junior TJ de A, Carvalho RF de, Cavalcanti SCM, Saavedra G de SFA, Borges ALS. Influence of plaster drying on the amount of residual monomer in heat-cured acrylic resins. Braz. J. Oral Sci. [Internet]. 2015 Oct. 16 [cited 2022 Oct. 1];12(2):84-9. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641063

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