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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Evaluation of the relationship between the cost and properties of glass ionomer cements indicated for atraumatic restorative treatment

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Bissoto Calvo, Ana Flavia [1] ; Kicuti, Ariane [1] ; Tedesco, Tamara Kerber [1] ; Braga, Mariana Minatel [1] ; Raggio, Daniela Procida [1]
Total Authors: 5
[1] Univ Sao Paulo, Sch Dent, Dept Orthodont & Pediat Dent, Sao Paulo, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Brazilian Oral Research; v. 30, n. 1 2016.
Web of Science Citations: 8

The aim of this study was to evaluate microshear bond strength (mu SBS), water sorption and solubility of glass ionomer cements (GIC) indicated for atraumatic restorative treatment (ART). Cylindrical specimens (6x2.4 mm) were used to test the sorption and solubility of each GIC (n = 5). The specimens were weighed before and after immersion in water and desiccation. For the mu SBS test, 60 primary molars were ground to obtain flat surfaces from both enamel and dentin. The teeth were then assigned to the tested GIC (n = 10) groups, namely Fuji IX - FIX, Ketac Molar - KM and Maxxion R - MX. The exposed surfaces were pre-treated with GIC liquid. Polyethylene tubes were placed on the pre-treated surface and filled with one of the GIC. After 24 h, the specimens were submitted to the mu SBS test. The failure mode was assessed using a stereomicroscope (400x magnification). The powder to liquid ratio and cost of material were also determined (n = 3). The data were analyzed by ANOVA and Tukey's post hoc test. Linear regression was used to determine the relation between cost and the other variables. Overall, MX showed lower mu SBS values (enamel: 3.93 +/- 0.38; dentin: 5.04 +/- 0.70) than FIX (enamel: 5.95 +/- 0.85; dentin: 7.01 +/- 1.06) and KM (enamel: 5.91 +/- 0.78; dentin: 6.88 +/- 1.35), as well as higher sorption and solubility. The regression analyses showed a significant and positive correlation between cost and mu SBS in enamel (R-2 = 0.62; p < 0.001) and dentin (R-2 = 0.43; p < 0.001); and a negative correlation between cost and water sorption (R-2 = 0.93; p < 0.001) and solubility (R-2 = 0.79; p < 0.001). In conclusion, the materials indicated for ART exhibit distinct physical and mechanical properties; in addition, low-priced materials may interfere with GIC properties. (AU)

FAPESP's process: 12/11846-5 - Effect of different aging models on bond strength in sound and carious primary dentin
Grantee:Ana Flávia Bissoto Calvo
Support type: Scholarships in Brazil - Doctorate