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Brazilian Journal of Oral Sciences
Piracicaba Dental School - UNICAMP
EISSN:
Vol. 14, No. 3, 2015, pp. 219-223
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Bioline Code: os15039
Full paper language: English
Document type: Research Article
Document available free of charge
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Brazilian Journal of Oral Sciences, Vol. 14, No. 3, 2015, pp. 219-223
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Soft denture liners and sodium perborate: sorption, solubility and color change
Pisani, Marina Xavier; Leite, Vanessa Maria Fagundes; Badaró, Maurício Malheiros; Malheiros-Segundo, Antônio de Luna; Paranhos, Helena de Freitas de Oliveira & da Silva, Cláudia Helena Lovato
Abstract
Aim: To evaluate the sorption, solubility and color change in two lining materials after 120 days of
immersion in either sodium perborate or artificial saliva. Methods: Thirty disk-shaped specimens
(15×3 mm) of each material, Mucopren® soft (MS) and Elite® soft (ES) were manufactured and
divided into two groups. The specimens in the control group (CG, n=15) were stored in artificial
saliva at 37 °C. The specimens in the experimental group (EG, n=15) were stored in artificial
saliva at 37 °C and immersed in sodium perborate daily for 5 min. The analysis of sorption and
solubility was based on the initial dry weight and on the wet and dry weights after immersion. The
color was assessed with a portable spectrophotometer and the NBS system. ANOVA and Tukey
test (p<0.05) were used to analyze color and sorption. The solubility was analyzed by Kruskal-
Wallis test (p<0.05). Results: Sorption was higher in the EG group (0.31±0.08) than in the
control group (0.26±0.05), and higher in Elite® soft relining (0.34±0.07) than in Mucopren® soft
(0.23±0.06). There was no interaction between the factors. Elite® Soft presented a higher solubility
when immersed in artificial saliva (CG: 0.16±0.07 and EG: 0.13±0.06; p=0.00). Mucopren® soft
showed no solubility in either treatment. Regarding the color changes, there was a significant
difference between the groups (CG: 9.2±1.2 and EG: 9.9±1.2; p=0.025) but not between the
materials (Mucopren® soft: 9.4±1.3 and Elite® soft: 9.7±1.0; p=0.34). Using the NBS system, we
verified that both materials presented a high color change. Conclusions: The daily use of
sodium perborate promoted changes in the liners’ sorption and color. Elite® soft relining was more
prone to changes than Mucopren® soft.
Keywords
denture; complete; denture liners; hygiene; physical properties
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© Copyright 2015 - Brazilian Journal of Oral Sciences Alternative site location: http://www.fop.unicamp.br/brjorals
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