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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.)

Effect of acid etching time on demineralization of primary and permanent coronal dentin

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Salles Scheffel, Debora Lopes [1] ; Andalo Tenuta, Livia Maria [2] ; Cury, Jaime Aparecido [2] ; Hebling, Josimeri [1]
Total Authors: 4
[1] Univ Estadual Paulista, UNESP, Araraquara Sch Dent, Dept Orthodont & Pediat Dent, Sao Paulo - Brazil
[2] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Physiol Sci, Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: AMERICAN JOURNAL OF DENTISTRY; v. 25, n. 4, p. 235-238, AUG 2012.
Web of Science Citations: 5

Purpose: To determine the effect of acid etching time on dentin calcium solubilization and to compare the solubilization rate of primary and permanent dentin when etched for the same period of time. Methods: Flat coronal dentin surfaces were produced on primary (n=8) and permanent (n=8) sound teeth. Three 2 mm-diameter areas were delimited on each surface and assigned to 5, 10 or 15 seconds of acid etching. Five microliters of 35% H3PO4 were applied on each area during the preset times, and 4 mu L, were retrieved for analysis. The amount of calcium was determined colorimetrically using Arsenazo III reagent and expressed as mu g Ca/mm(2) of dentin. Data were subjected to two-way ANOVA, Tukey's test and linear regression (alpha=5%). Results: For both primary and permanent dentin, a statistically significant correlation was observed between acid etching time and calcium concentration (primary dentin R-2= 0.79; permanent dentin R-2= 0.73). Mean (sd) values of dissolved primary dentin after 5, 10 and 15 seconds were 1.00 (0.25), 1.74 (0.11) and 2.30 (0.42), whereas for permanent dentin the values were 0.47 (0.13), 0.89 (0.36) and 1.38 (0.20) mu g Ca/mm(2), respectively. Greater calcium solubilization (P< 0.05) was detected for primary dentin than for permanent dentin after all acid etching times. (Am J Dent 2012;25:235-238). (AU)

FAPESP's process: 09/07924-8 - Acid etching time of sound and caries-affected dentin of decidous and permanent teeth: effect on the substrate solubility and production of the resin-dentin bond
Grantee:Josimeri Hebling Costa
Support type: Regular Research Grants
FAPESP's process: 08/02278-8 - Acid etching time of sound and caries-affected dentin of deciduous and permanent teeth: effect on substrate dissolution and resin-dentin bond strength
Grantee:Débora Lopes Salles Scheffel
Support type: Scholarships in Brazil - Master