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Journal of Biomaterials Applications
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In-depth Polymerization of Dual-cured Resin Cement Assessed by Hardness

Rogério V. Reges

Department of Restorative Dentistry, Dental Materials Division Piracicaba Dental School, State University of Campinas Av. Limeira, 901 - 13414-903 - Piracicaba, SP, Brazil

Rafael R. Moraes

Department of Restorative Dentistry, Dental Materials Division Piracicaba Dental School, State University of Campinas Av. Limeira, 901 - 13414-903 - Piracicaba, SP, Brazil

Américo B. Correr

Department of Restorative Dentistry, Dental Materials Division Piracicaba Dental School, State University of Campinas Av. Limeira, 901 - 13414-903 - Piracicaba, SP, Brazil

Mário A.C. Sinhoreti

Department of Restorative Dentistry, Dental Materials Division Piracicaba Dental School, State University of Campinas Av. Limeira, 901 - 13414-903 - Piracicaba, SP, Brazil

Lourenço Correr-Sobrinho

Department of Restorative Dentistry, Dental Materials Division Piracicaba Dental School, State University of Campinas Av. Limeira, 901 - 13414-903 - Piracicaba, SP, Brazil, sobrinho{at}fop.unicamp.br

Evandro Piva

Department of Restorative Dentistry, School of Dentistry Federal University of Pelotas R. Gonçalves Chaves 457 - 96015-560 - Pelotas, RS, Brazil

Paulo R.A. Nouer

Department of Orthodontics School of Dentistry São Leopoldo Mandic R. José Rocha Junqueira 13 - 13045-755 - Campinas, SP, Brazil

This study investigates the in-depth polymerization of dual-cured resin cement (Enforce; Dentsply, shades A2, B1, and opaque). Cylindrical specimens are obtained by photo-activation through ceramic. Control samples are light-cured without using ceramic. Samples are tested after 15 min or 24 h. Knoop hardness readings are made at 100, 300, 500, and 700 µm depth. Hardness is generally dependent on the mode of activation and post-cure time. Shades A2 and B1 show higher hardness values than opaque resin. Hardness at 100 µm is higher than at 700 µm. A linear relationship between hardness and depth is observed.

Key Words: ceramic • dental materials • hardness • resin cement • polymerization depth.

This version was published on July 1, 2008

Journal of Biomaterials Applications, Vol. 23, No. 1, 85-96 (2008)
DOI: 10.1177/0885328207086316
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