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Proceedings Paper

Influence of gel/LED-laser application on cervical microleakage of two barrier materials used for endodontically treated teeth whitening
Author(s): Melissa Andréia Marchesan; Felipe Barros; Saulo Porto; Suellen Zaitter; Aldo Brugnera; Manoel D. Sousa-Neto
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Paper Abstract

This study evaluated ex vivo the influence of the number of gel/LED-laser applications/activations on cervical microleakage of two different barrier materials used for protection during whitening of endodontically treated teeth. Eighty-four canines were instrumented and obturated with epoxy resin sealer. The seal was removed 2 mm beyond the cemento-enamel junction for barrier placement and the teeth were divided into two groups of 40 teeth each: G1, zinc phosphate cement; G2, glass ionomer cement. The two groups were subdivided into 4 subgroups (n=10 each): I) no gel or LED-laser application; II) one gel application and two LED-laser activations; III) two gel applications and four LED-laser activations; IV) three gel applications and six LED-laser activations. The teeth were immersed in India ink for 7 days, decalcified and cleared. Cervical microleakage was quantified with a measurement microscope. Statistical analysis showed that zinc phosphate caused significantly lower microleakage than glass ionomer cement (presented microleakage in all subgroups). However, after two (p<0.01) and three (p<0.001) applications of gel, there was statistially significant microleakage in zinc phosphate barriers. Based on the present results, it can be concluded that cervical barriers with zinc phosphate cement show less cervical microleakage and that two or more applications/activations of gel/LED-laser significantly increase microleakage.

Paper Details

Date Published: 8 March 2007
PDF: 5 pages
Proc. SPIE 6425, Lasers in Dentistry XIII, 64250X (8 March 2007); doi: 10.1117/12.701379
Show Author Affiliations
Melissa Andréia Marchesan, Univ. of Ribeirão Preto (Brazil)
Felipe Barros, Univ. of Ribeirão Preto (Brazil)
Saulo Porto, Univ. of Ribeirão Preto (Brazil)
Suellen Zaitter, Univ. of Ribeirão Preto (Brazil)
Aldo Brugnera, Univ. of Ribeirão Preto (Brazil)
Manoel D. Sousa-Neto, Univ. of Ribeirão Preto (Brazil)

Published in SPIE Proceedings Vol. 6425:
Lasers in Dentistry XIII
Peter Rechmann; Daniel Fried, Editor(s)

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