Effect of storage time and chlorhexidine addition on the mechanical properties of glass ionomer cements

Authors

  • Juliana de Carvalho Machado Universidade Federal Fluminense
  • Cristiane Duque Universidade Estadual Paulista
  • Josânia Pitzer de Oliveira Universidade Federal Fluminense
  • Angela Scarparo Caldo-Teixeira Universidade Federal Fluminense

DOI:

https://doi.org/10.20396/bjos.v16i0.8650457

Keywords:

Glass ionomer cements. Chlorhexidine. Dental caries. Water storage. Mechanical properties.

Abstract

Aims: To evaluate the effect of the chlorhexidine (CHX) incorporation and the storage time on the mechanical properties of glass ionomer cements (GICs). Methods: The following GICs were evaluated: Ketac Molar Easymix (KM), Vidrion R (VR) and Vitromolar (VM), containing or not CHX.  GIC liquid was modified by adding 1.25 % CHX digluconate and then manipulated with the power and placed into the stainless steel cylindrical or bar-shaped molds. GICs specimens were stored into water for 1, 7 and 28 days. After these periods, specimens were submitted to flexural, diametral tensile and compressive strength tests, according to ISO standards. Data from mechanical tests were statistically analyzed using 2-way ANOVA and Tukey tests. Results: Overall, the storage time did not influence any of the mechanical properties of the GICs tested. In contrast, the inclusion of CHX reduced significantly these properties for all GICs tested. KM presented the highest values of compressive strength for all storage times. KM + 1.25% CHX had lower compressive strength results than KM, however, it showed similar results when compared to another GICs without CHX. Conclusions: The presence of chlorhexidine, independent of the storage time, interfered on the mechanical characteristics of GIC.

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Author Biographies

Juliana de Carvalho Machado, Universidade Federal Fluminense

Especialista em Endodontia e Mestre em Ciência Odontológica - área de Endodontia, pela Universidade Estadual Paulista "Júlio de Mesquita Filho"(UNESP), campus Araçatuba- SP (2016). Graduada em Odontologia pela Universidade Federal Fluminense (2013). 

Cristiane Duque, Universidade Estadual Paulista

Possui graduação em Odontologia pela Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP - Araraquara (1999), especialização em Odontopediatria pelo Hospital de Reabilitação de Anomalias Craniofaciais - USP - Bauru (2002) e doutorado em Ciências Odontológicas (Área - Odontopediatria) pela Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP (2005). Realizou pós-doutoramento na área de Microbiologia e Imunologia na Faculdade de Odontologia de Piracicaba - UNICAMP, com estágio na Forsyth Institute (EUA) (2006-2009) e estágio na área de Biologia Celular na Faculté de Medicine Dentaire, Université Laval de janeiro a março de 2017. Atualmente é professor assistente doutor de Odontopediatria da Faculdade de Odontologia de Araçatuba - UNESP.

Josânia Pitzer de Oliveira, Universidade Federal Fluminense

Graduação em Odontologia pela Universidade Federal Fluminense. 

Angela Scarparo Caldo-Teixeira, Universidade Federal Fluminense

Possui graduação em Odontologia pela Faculdade de Odontologia da Universidade São Francisco (1998), especialização em Odontopediatria pela Faculdade de Odontologia de Piracicaba - UNICAMP (2000), especialização em Gestão em Saúde pela UEPG (2012), Mestrado em Materiais Dentários pela Faculdade de Odontologia de Piracicaba - UNICAMP (2003), Doutorado em Odontopediatria pela Universidade Federal de Santa Catarina - UFSC (2007). Atualmente é Professora Associada I do Curso de Odontologia do Instituto de Saúde de Nova Friburgo - Universidade Federal Fluminense, fazendo parte das Disciplinas de Odontopediatria, Atendimento Infanto-juvenil baseado em evidências científicas e Materiais Dentários.

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Published

2017-12-15

How to Cite

1.
Machado J de C, Duque C, Oliveira JP de, Caldo-Teixeira AS. Effect of storage time and chlorhexidine addition on the mechanical properties of glass ionomer cements. Braz. J. Oral Sci. [Internet]. 2017Dec.15 [cited 2021Dec.3];16:1-9. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8650457

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