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.)

Influence of the Light Curing Tip Distance and Material Opacity on Selected Physical Properties of a Pit and Fissure Sealant

Full text
Author(s):
Dutra Borges, Boniek Castillo [1] ; de Pinho Silva, Paulo Roger [1] ; Catelan, Anderson [1] ; Baggio Aguiar, Flavio Henrique [1]
Total Authors: 4
Affiliation:
[1] Univ Estadual Campinas, Piracicaba Dent Sch, Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: PEDIATRIC DENTISTRY; v. 33, n. 7, p. 505-509, NOV-DEC 2011.
Web of Science Citations: 2
Abstract

Purpose: The purpose of this study was to evaluate the influence of the light curing to distance and material opacity on hardness (KHN), degree of conversion (DC), and crosslink density (CLD) of a resin-based fissure sealant (Fluroshield). Methods: One-millimeter-thick white opaque and clear sealant specimens, photoactivated at 1-, 2-, and 3-mm distances, were fabricated (8 groups, N=5). KHN and DC were evaluated 24 hours after polymerization. Specimens were subjected to a new KHN reading after 24-hour immersion in absolute ethanol to indirectly assess the CLD. Results: Samples of clear sealant cured at longer distances presented lower KHN, although there were not differences between opacities at all distances. The mean DC of the opaque white material, however, was lower than that of the clear one at higher distances. There were no differences among CLD for all experimental conditions analyzed. Conclusions: KHN of the clear sealant was affected by increased distances. The clear sealant showed higher DC at increased distances, although CLD was not influenced by the factors under study. Since physical properties of sealing materials are directly related to their clinical efficacy, the clear sealant tested may present a better clinical performance than the opaque one. (Pediatr Dent 2011;33:505-9) Received April 20, 2070 vertical bar Last Revision July 4, 2010 vertical bar Accepted July 7, 2010 (AU)

FAPESP's process: 07/02800-3 - Effect of light curing modes and light curing time on degree of conversion and leachability of uncured substances of bonding systems and composite resins
Grantee:Flávio Henrique Baggio Aguiar
Support Opportunities: Regular Research Grants