Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influences of surface and solvent on retention of HEMA/mixture components after evaporation

Full text
Author(s):
Garcia, Fernanda C. P. [1] ; Wang, Linda [2] ; Pereira, Lucia C. G. [3] ; de Andrade e Silva, Safira M. [4] ; Junior, Luiz M. [2] ; de Oliveira Carrilho, Marcela Rocha [5]
Total Authors: 6
Affiliation:
[1] Univ Brasilia, Dept Restorat Dent, Dent Mat Area, BR-70910900 Brasilia, DF - Brazil
[2] Univ Sao Paulo, Bauru Sch Dent, Dept Operat Dent, Bauru, SP - Brazil
[3] UniEvangelica, Anapolis Sch Dent, Goias, Go - Brazil
[4] UNIME, Coll Hlth & Agrarian Sci, Lauro De Freitas, BA - Brazil
[5] Univ Bandeirante Sao Paulo, GEO, Sao Paulo - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Journal of Dentistry; v. 38, n. 1, p. 44-49, JAN 2010.
Web of Science Citations: 12
Abstract

Objectives: This study examined the retention of solvents within experimental HEMA/solvent primers after two conditions for solvent evaporation: from a free surface or from dentine surface. Methods: Experimental primers were prepared by mixing 35% HEMA with 65% water, methanol, ethanol or acetone (v/v). Aliquots of each primer (50 mu l) were placed on glass wells or they were applied to the surface of acid-etched dentine cubes (2 mm x 2 mm x 2 mm) (n = 5). For both conditions (i.e. from free surface or dentine cubes), change in primers mass due to solvent evaporation was gravimetrically measured for 10 min at 51% RH and 21 degrees C. The rate of solvent evaporation was calculated as a function of loss of primers mass (%) over time. Data were analysed by two-way ANOVA and Student-Newman-Keuls (p < 0.05). Results: There were significant differences between solvent retention(%) and evaporation rate (%/min) depending on the solvent present in the primer and the condition for evaporation (from free surface or dentine cubes) (p < 0.05). For both conditions, the greatest amount of retained solvent was observed for HEMA/water primer. The rate of solvent evaporation for HEMA/acetone primer was almost 2- to 10-times higher than for HEMA/water primer depending whether evaporation occurred, respectively, from a free surface or dentine cubes. The rate of solvent evaporation varied with time, being in general highest at the earliest periods. Conclusions: The rate of solvent evaporation and its retention into HEMA/solvent primers was influenced by the type of the solvent and condition allowed for their evaporation. (C) 2009 Elsevier Ltd. All rights reserved. (AU)