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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.)

Influence of Curing Mode and Time on Degree of Conversion of One Conventional and Two Self-adhesive Resin Cements

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Author(s):
Aguiar, T. R. [1] ; Francescantonio, M. D. [1] ; Arrais, C. A. G. [2] ; Ambrosano, G. M. B. [3] ; Davanzo, C. [4] ; Giannini, M. [1]
Total Authors: 6
Affiliation:
[1] Univ Estadual Campinas, Dept Restorat Dent, Piracicaba, SP - Brazil
[2] Univ Guarulhos, Dept Operat Dent, Guarulhos, SP - Brazil
[3] Univ Estadual Campinas, Dept Social Dent, Piracicaba, SP - Brazil
[4] Univ Estadual Campinas, Inst Chem, Campinas, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Operative Dentistry; v. 35, n. 3, p. 295-299, MAY-JUN 2010.
Web of Science Citations: 30
Abstract

This study evaluated the effect of curing mode (auto- and dual-polymerizing mode) and time interval (5, 10 and 15 minutes) on the degree of conversion of resin cements. One conventional dual-cured resin cement (Panavia F 2.0 {[}Kuraray Medical Inc]) and two self-adhesive cements (RelyX Unicem {[}3M ESPE] and BisCem {[}BISCO, Inc]) were evaluated. The products (n=5) were manipulated according to the manufacturer's instructions and applied to the surface of a horizontal attenuated reflectance unit attached to an infrared spectrometer. The materials were either light-cured for 40 seconds (dual-polymerizing mode) or allowed to auto-polymerize. The degree of conversion was calculated according to changes in the aliphatic-to-aromatic peak ratios prior to and 5, 10 and 15 minutes after light-activation or after mixing when the specimens were allowed to auto-polymerize. Data (%) were analyzed by two-way repeated measure ANOVA (curing mode and time interval) and Tukey's post-hoc test (alpha=0.05%). The light-activating mode led to a higher degree of conversion values than the self-curing mode in self-adhesive cements (RelyX Unicem and BisCem), while there was no difference in the degree of conversion between the self- and light-cured groups of Panavia F 2.0 resin cement. All products showed a higher degree of conversion at 15 minutes post-curing than any other evaluation interval. The self-adhesive cements provide a higher degree of conversion values when light-activated. After 15 minutes of polymerization initiation, the degree of conversion was higher in all resin cements, regardless of the curing mode. (AU)