Quality improvement of photopolimerizable-cement root canal obturation

Luis Augusto Lupato Conrado; Iris Maria Frois; Renato Amaro Zangaro; Egberto Munin; Carlos Kuranaga; Marcos Dias da Silva; Maria do Carmo de Andrade Nono; Mirabel Cerquiera Rezende

doi:10.1117/12.476496

3 July 2003 Quality improvement of photopolimerizable-cement root canal obturation

Luis Augusto Lupato Conrado, Iris Maria Frois, Renato Amaro Zangaro, Egberto Munin, Carlos Kuranaga, Marcos Dias da Silva, Maria do Carmo de Andrade Nono, Mirabel Cerquiera Rezende

Author Affiliations +

Proceedings Volume 4950, Lasers in Dentistry IX; (2003) https://doi.org/10.1117/12.476496
Event: Biomedical Optics, 2003, San Jose, CA, United States

Abstract

The sealing cements commonly used for endodontic applications are of the type cured through chemical reactions. During the polymerization process, mechanical contractions are not uncommon, leading to a non-perfect sealing. Photopolymerizable cements usually presents superior performance as compared to those chemically activated. However, difficulties in carrying the light to difficult-to-reach regions like the dental apex preclude those material of being accepted in the dental office routine. This work reports on a novel technique which allow the light curing of photopolymerizable cements in endodontic applications. A special light guide had been developed to allow the curing light to reach and polymerize the sealing cement in the apex region. The technique was tested by using single-root human teeth with normal canal morphology. The Ultradent EndoREZ root canal sealer and a resin-based photopolymerizable filler specially developed for the current application had been used. The cone-shaped light guide was introduced into treated canals filled with the photopolymerizable material, up to the apical region. Light from an argon laser was launched onto the light guide for polymerization. All test samples were immersed in methylene-blue solution for microleakage testing. All samples treated with the self-polymerizable material presented dye penetration to some extent. No sample within the group which had the filling material polymerized by using the light guide presented dye penetration through the canal wall.

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Luis Augusto Lupato Conrado, Iris Maria Frois, Renato Amaro Zangaro, Egberto Munin, Carlos Kuranaga, Marcos Dias da Silva, Maria do Carmo de Andrade Nono, and Mirabel Cerquiera Rezende "Quality improvement of photopolimerizable-cement root canal obturation", Proc. SPIE 4950, Lasers in Dentistry IX, (3 July 2003); https://doi.org/10.1117/12.476496

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KEYWORDS

Cements

Waveguides

Polymerization

Polymers

Argon ion lasers

Chemical reactions

Lasers in dentistry

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