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.
Rosenstiel, S.F. , Land, M.F. and Crispin, B.J. (1998). Dental Luting Agents: A Review of the Current Literature , J. Prosthet. Dent., 80(3): 280-301.
2.
Malament, K.A. and Socransky, S.S. (2001). Survival of Dicor Glass-Ceramic Dental Restorations over 16 Years. Part III: Effect of Luting Agent and Tooth or Tooth-Substitute Core Structure , J. Prosthet. Dent., 86(5): 511-519.
3.
Groten, M. and Probster, L. (1997). The Influence of Different Cementation Modes on the Fracture Resistance of Feldspathic Ceramic Crowns , Int. J. Prosthodont., 10(2): 169-177.
4.
Moraes, R.R. , Correr-Sobrinho, L. , Sinhoreti, M.A. , Puppin-Rontani, R.M. , Ogliari, F.A. and Piva, E. (2007). Light-Activation of Resin Cement through Ceramic: Relationship between Irradiance Intensity and Bond Strength to Dentin, J. Biomed. Mater. Res. B Appl. Biomater. doi:10.1002/ jbm.b.30928.
5.
Danesh, G. , Davids, H. , Reinhardt, K.J. , Ott, K. and Schafer, E. (2004). Polymerisation Characteristics of Resin Composites Polymerised with Different Curing Units, J. Dent. , 32(6): 479-488.
6.
el-Mowafy, O.M. , Rubo, M.H. and el-Badrawy , W.A. (1999). Hardening of New Resin Cements Cured through a Ceramic Inlay , Oper. Dent., 24(1): 38-44.
7.
Akgungor, G. , Akkayan, B. and Gaucher, H. (2005). Influence of Ceramic Thickness and Polymerization Mode of a Resin Luting Agent on Early Bond Strength and Durability with a Lithium Disilicate-Based Ceramic System , J. Prosthet. Dent., 94(3): 234-241.
8.
Blackman, R. , Barghi, N. and Duke, E. (1990). Influence of Ceramic Thickness on the Polymerization of Light-Cured Resin Cement , J. Prosthet. Dent., 63(3): 295-300.
9.
Foxton, R.M. , Pereira, P.N. , Nakajima , M. , Tagami, J. and Miura, H. (2003). Effect of Light Source Direction and Restoration Thickness on Tensile Strength of a Dual-Curable Resin Cement to Copy-Milled Ceramic , Am. J. Dent., 16(2): 129-134.
10.
Jung, H. , Friedl, K.H. , Hiller, K.A. , Haller, A. and Schmalz, G. (2001). Curing Efficiency of Different Polymerization Methods through Ceramic Restorations, Clin . Oral Investig. , 5(3): 156-161.
11.
Rasetto, F.H. , Driscoll, C.F. , Prestipino , V. , Masri, R. and von Fraunhofer , J.A. (2004 ). Light Transmission through All-Ceramic Dental Materials: A Pilot Study , J. Prosthet. Dent., 91(5): 441-446.
12.
Feilzer, A.J. , De Gee, A.J. and Davidson, C.L. (1988). Curing Contraction of Composites and Glass-Ionomer Cements , J. Prosthet. Dent. , 59(3): 297-300.
13.
Mathew, L. , Joseph, R. and Krishnan, V.K. (1997). Effect of Amine Activators on the Properties of Chemical Cured Dental Composites , J. Biomater. Appl., 11(3): 349-359.
14.
Musanje, L. and Darvell, B.W. (2006). Curing-Light Attenuation in Filled-Resin Restorative Materials, Dent . Mater., 22(9): 804-817.
15.
Shortall, A.C. (2005). How Light Source and Product Shade Influence Cure Depth for a Contemporary Composite , J. Oral Rehabil., 32(12): 906-911.
16.
Rueggeberg, F.A. , Ergle, J.W. and Mettenburg , D.J. (2000). Polymerization Depths of Contemporary Light-Curing Units using Microhardness , J. Esthet. Dent., 12(6): 340-349.
17.
Obici, A.C. , Sinhoreti, M.A.C. , Frollini, E. , Correr-Sobrinho , L. , de Goes, M.F. and Henriques, G.E.P. (2006). Monomer Conversion at Different Dental Composite Depths Using Six Light-Curing Methods , Polym. Test., 25(3): 282-288.
18.
Lee, I.B. and Um, C.M. (2001). Thermal Analysis on the Cure Speed of Dual Cured Resin Cements under Porcelain Inlays , J. Oral Rehabil., 28(2): 186-197.
19.
Leloup, G. , Holvoet, P.E. , Bebelman, S. and Devaux, J. (2002). Raman Scattering Determination of the Depth of Cure of Light-Activated Composites: Influence of Different Clinically Relevant Parameters , J. Oral Rehabil., 29(6): 510-515.
20.
Rueggeberg, F. (1999). Contemporary Issues in Photocuring , Compend. Contin. Educ. Dent., 25(Supplement): S4-15.
21.
Cohen, M.E. , Leonard, D.L. , Charlton , D.G. , Roberts, H.W. and Ragain, J.C. (2004). Statistical Estimation of Resin Composite Polymerization Sufficiency using Microhardness, Dent . Mater., 20(2): 158-166.
22.
Aravamudhan, K. , Rakowski, D. and Fan , P.L. (2006). Variation of Depth of Cure and Intensity with Distance Using Led Curing Lights, Dent . Mater., 22(11): 988-994.
23.
Orefice, R.L. , Discacciati, J.A.C. , Neves, A.D. , Mansur, H.S. and Jansen, W.C. (2003). In Situ Evaluation of the Polymerization Kinetics and Corresponding Evolution of the Mechanical Properties of Dental Composites, Polym . Test., 22(1): 77-81.
24.
Nomoto, R. , Asada, M. , McCabe, J.F. and Hirano, S. (2006). Light Exposure Required for Optimum Conversion of Light Activated Resin Systems, Dent . Mater., 22(12): 1135-1142.
