Influence of curing protocol and ceramic composition on the degree of conversion of resin cement
J. appl. oral sci
;
25(6): 700-707, Nov.-Dec. 2017. tab, graf
Artículo
en Inglés
| LILACS, BBO
| ID: biblio-893664
ABSTRACT
Abstract Due to increasing of aesthetic demand, ceramic crowns are widely used in different situations. However, to obtain long-term prognosis of restorations, a good conversion of resin cement is necessary. Objective:
To evaluate the degree of conversion (DC) of one light-cure and two dual-cure resin cements under a simulated clinical cementation of ceramic crowns. Material andMethods:
Prepared teeth were randomly split according to the ceramic's material, resin cement and curing protocol. The crowns were cemented as per manufacturer's directions and photoactivated either from occlusal suface only for 60 s; or from the buccal, occlusal and lingual surfaces, with an exposure time of 20 s on each aspect. After cementation, the specimens were stored in deionized water at 37°C for 7 days. Specimens were transversally sectioned from occlusal to cervical surfaces and the DC was determined along the cement line with three measurements taken and averaged from the buccal, lingual and approximal aspects using micro-Raman spectroscopy (Alpha 300R/WITec®). Data were analyzed by 3-way ANOVA and Tukey test at =5%.Results:
Statistical analysis showed significant differences among cements, curing protocols and ceramic type (p<0.001). The curing protocol 3x20 resulted in higher DC for all tested conditions; lower DC was observed for Zr ceramic crowns; Duolink resin cement culminated in higher DC regardless ceramic composition and curing protocol.Conclusion:
The DC of resin cement layers was dependent on the curing protocol and type of ceramic.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Cementos de Resina
/
Cementos Dentales
/
Porcelana Dental
/
Estética Dental
/
Luces de Curación Dental
Tipo de estudio:
Guía de Práctica Clínica
Límite:
Humanos
Idioma:
Inglés
Revista:
J. appl. oral sci
Asunto de la revista:
Odontología
Año:
2017
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Universidade Federal de Minas Gerais/BR
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