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

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• 作者：Luciana Tiemi Inagaki^a ; Vanessa Benetello Dainezi^a ; Roberta Caroline Bruschi Alonso^b ; André ; ia Bolzan de Paula^c ; Franklin Garcia-Godoy^d ; Regina Maria Puppin-Rontani^a ; Fernanda Miori Pascon^a ; ^{fmpascon@fop.unicamp.br" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Sorption ; Solubility ; Softening ; Flexural strength ; Elastic modulus ; Chlorhexidine ; Infiltrants
• 刊名：Journal of Dentistry
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：49
• 期：Complete
• 页码：40-45
• 全文大小：335 K

文摘

To evaluate physical-chemical properties of experimental diacetate chlorhexidine (CHX)-added resin blends.

d="absSec_2">Methods

d="spar0030">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^® 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 °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 °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 (α = 5%).

d="absSec_3">Results

d="spar0035">TEGDMA/BisEMA blends and Icon^® showed the lowest sorption from blends (p > 0.05), and Icon^® was the most soluble material (p < 0.01). TEGDMA/UDMA/0.1%CHX showed the highest softening, similar to Icon^® (p > 0.05). For EM, all blends were different than Icon^® (p < 0.01). For FS, TEGDMA blends were similar to Icon^®, showing the lowest averages (p > 0.05).

d="absSec_4">Conclusions

d="spar0040">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.

d="absSec_5">Clinical significance

d="spar0045">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.