Evaluation of sorption/solubility, softening, flexural strength and elastic modulus of experimental resin blends with chlorhexidine

Autor(es)

Inagaki, Luciana Tiemi ^[1] ; Dainezi, Vanessa Benetello ^[1] ; Bruschi Alonso, Roberta Caroline ^[2] ; de Paula, Andrela Bolzan ^[3] ; Garcia-Godoy, Franklin ^[4] ; Puppin-Rontani, Regina Maria ^[1] ; Pascon, Fernanda Miori ^[1]

Afiliação do(s) autor(es)

^[1] Univ Campinas UNICAMP, Piracicaba Dent Sch, Dept Pediat Dent, POB 52, BR-13414903 Piracicaba, SP - Brazil

^[2] Anhanguera Univ Sao Paulo UNIAN SP, Biomat, Raimundo Pereira Magalhaoes Ave, 3305 Pirituba, BR-05145200 Sao Paulo, SP - Brazil

^[3] Univ Campinas UNICAMP, Piracicaba Dent Sch, Dept Restorat Dent, Div Dent Mat, POB 52, BR-13414903 Piracicaba, SP - Brazil

^[4] Univ Tennessee, Ctr Hlth Sci, Coll Dent, Dept Biosci Res, 875 Union Ave, Memphis, TN 38163 - USA

• Tipo de documento: Artigo Científico
• Fonte: Journal of Dentistry; v. 49, p. 40-45, JUN 2016.
• Citações Web of Science: 6

Resumo

Objectives: To evaluate physical-chemical properties of experimental diacetate chlorhexidine (CHX)-added resin blends. Methods: Blends were formulated: G1) TEGDMA; G2) TEGDMA/0.1% CHX; G3) TEGDMA/0.2% CHX; G4) TEGDMA/UDMA; G5) TEGDMA/UDMA/0.1% CHX; G6) TEGDMA/UDMA/0.2% CHX; G7) TEGDMA/BisEMA, G8) TEGDMA/BisEMA/0.1% CHX; G9) TEGDMA/BisEMA/0.2% CHX. Icon (R) was the control group. For sorption/solubility (SS), cylindrical specimens (n = 5) were prepared and their weight obtained. The specimens were immersed in deionized water for 7 days at 37 degrees C and their weight was verified again. SS were calculated using accepted formulas. For softening, cylindrical specimens (n = 10) were prepared and initial Knoop hardness number (KHN) obtained. The specimens were immersed in absolute ethanol for 24 h at 37 degrees C and final KHN accomplished. Softening values were calculated by KHN reduction percentage. For elastic modulus (EM) and flexural strength (FS) bar specimens were prepared (n = 10) and values obtained with a universal device (three point, 5 mm distance, 0.5 mm/min, load of 50 N). The data was analyzed using one-way ANOVA and Tukey test (alpha = 5%). Results: TEGDMA/BisEMA blends and Icon (R) showed the lowest sorption from blends (p > 0.05), and Icon (R) was the most soluble material (p < 0.01). TEGDMA/UDMA/0.1% CHX showed the highest softening, similar to Icon (R) (p > 0.05). For EM, all blends were different than Icon (R) (p < 0.01). For FS, TEGDMA blends were similar to Icon (R), showing the lowest averages (p > 0.05). Conclusions: Monomers chemical characteristics influenced the physical-chemical properties of experimental blends more than CHX. Between the blends tested, UDMA blends presented satisfactory results for assays evaluated. Clinical significance: Infiltrants CHX-added could arrest and reinforce initial caries lesions, and the antimicrobial effect could prevent new lesions in sound enamel adjacent to the infiltrated area. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 11/22149-0 - Avaliação de infiltrantes experimentais quanto à solubilidade, citotoxicidade e resistência à degradação química, mecânica e biodegradação
• Beneficiário: Luciana Tiemi Inagaki
• Modalidade de apoio: Bolsas no Brasil - Doutorado