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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.)

Leachability of Degradation Products from Hard Chairside Reline Resins in Artificial Saliva: Effect of Water-Bath Post-Polymerization Treatment

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Author(s):
Urban, Vanessa Migliorini [1] ; Machado, Ana Lucia [2] ; Vergani, Carlos Eduardo [2] ; Giampaolo, Eunice Teresinha [2] ; Pavarina, Ana Claudia [2] ; Cass, Quezia Bezerra [3]
Total Authors: 6
Affiliation:
[1] Univ Estadual Ponta Grossa, UEPG, Dept Dent, Ponta Grossa, Parana - Brazil
[2] Univ Estadual Paulista, Dept Dent Mat & Prosthodont, Sao Paulo - Brazil
[3] Univ Fed Sao Carlos, Dept Chem, Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Applied Polymer Science; v. 123, n. 2, p. 732-739, JAN 15 2012.
Web of Science Citations: 2
Abstract

The effect of a post-polymerization treatment on the leaching of methacrylic acid (MA) and benzoic acid (BA) from the reline resins {[}Kooliner (K), New Truliner (N), Ufi Gel hard (U), and Tokuso Rebase Fast (T)] was evaluated. Specimens of each material were divided into two groups: Group C (control) - left untreated; Group WB (water-bath) - immersion in water at 55 +/- 1 degrees C for 10 min. Specimens were placed in artificial saliva at 37 +/- 1 degrees C and, after 1-, 3-, 5-, 24-h and 3-, 7-, 14-, and 30-day intervals, aliquots were removed and analyzed using high performance liquid chromatography. Data were analyzed by using Wilcoxon, Mann-Whitney or Kruskal-Wallis tests (alpha = 0.05). At 1 h, the concentration of MA released from U control specimens was higher than those of the other ones, and decreased after 3 h. WB specimens released lower amounts of MA than control specimens only for material U, at the 1- and 3-h periods. For all control specimens, concentrations of leached BA progressively decreased within 5 h and from 24 h to the end. WB specimens released significantly lower amounts of BA than did the control groups. The highest concentration of MA was leached from control specimens of Ufi Gel hard. Water-bath post-polymerization treatment caused a significant reduction in elution of BA. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 123:732-739, 2012 (AU)