Keywords
CAD/CAM; Blanqueamiento; Rugosidad superficial; Microdureza.
How to Cite
Abstract
Surface changes of restorative materials after bleaching have clinical importance in terms of the durability and survival of restorations. This study aimed to evaluate the effect of home bleaching on the surface roughness, microhardness, and surface analysis of four different types of chairside computer-aided design and computer-aided manufacturing (CAD/CAM) materials. Specimens were prepared from composite resin (Brilliant Crios: BC), resin nanoceramic (Lava Ultimate: LU), polymer-infiltrated ceramic-network (Vita Enamic: VE), and zirconia-reinforced lithium silicate glass-ceramic (Vita Suprinity: VS) CAD/CAM materials. Specimens were polished using 800, 1000, 1200, and 2000 grit SiC papers. Each restorative material was randomly divided into two groups; control and bleaching (n=10). The 16% carbamide peroxide bleaching agent (Whiteness Perfect 16%, FGM) was applied to the specimens for 4 h/day for 14 days. Surface roughness values (Ra) were obtained using a profilometer, and microhardness values (VHN) were obtained using a Vickers microhardness test. Surface analysis of specimens was evaluated by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). Data were analyzed Two-way ANOVA and Fisher’s Least Significant Difference (LSD) test (p<0.05). After bleaching, the surface roughness of BC (p<0.001) and VE (p<0.032) significantly increased. Bleaching did not significantly affect the microhardness of CAD/CAM materials. SEM evaluation showed material-dependent surface damages after bleaching procedures. The effect of 16% carbamide peroxide home bleaching agent on surface roughness and microhardness of chairside CAD/CAM materials is material-dependent. Before bleaching, restorative materials should be protected by applying a protective barrier and contact with the bleaching agent should be minimized. Also, after bleaching, the restoration surface should be carefully inspected, and re-polishing might be beneficial.
References
Polydorou O., Mönting J.S., Hellwig E., Auschill T.M. Effect of in-office tooth bleaching on the microhardness of six dental esthetic restorative materials. Dent Mater. 2007; 23:153-58.
Malkondu Ö., Yurdagüven H., Say E.C., Kazazoǧlu E., Soyman M. Effect of bleaching on microhardness of esthetic restorative materials. Oper Dent. 2011; 36: 177-86.
Auschill T.M., Hellwig E., Schmidale S., Sculean A., Arweiler N.B. Efficacy, side-effects and patients’ acceptance of different bleaching techniques (OTC, in-office, at-home). Oper Dent. 2005; 30: 156-63.
Greenwall-Cohen J., Francois P., Silikas N., Greenwall L., Le Goff S., Attal J.P. The safety and efficacy of ‘over the counter’ bleaching products in the UK. Br Dent J. 2019; 226: 271-276.
American Dental Association (ADA). Tooth whitening/bleaching: treatment considerations for dentists and their patients. 2009.
Basting R.T., Y Fernandéz C.F., Ambrosano GMB, Campos I.T. Effects of a 10% Carbamide Peroxide Bleaching Agent on Roughness and Microhardness of Packable Composite Resins. J Esthet Restor Dent. 2005; 17: 256-62.
Okte Z., Villalta P., García-Godoy F., Lu H., Powers J.M. Surface hardness of resin composites after staining and bleaching. Oper Dent. 2006; 31: 623-28.
Hannig C., Duong S., Becker K., Brunner E., Kahler E., Attin T. Effect of bleaching on subsurface micro-hardness of composite and a polyacid modified composite. Dent Mater. 2007; 23: 198-203.
Cho S.D., Bulpakdi P., Matis B.A., Platt J.A. Effect of bleaching on fracture toughness of resin composites. Oper Dent. 2009; 34: 703-08.
Yu H., Zhang C.Y., Cheng S.L., Cheng H. Effects of bleaching agents on dental restorative materials: A review of the literature and recommendation to dental practitioners and researchers. J Dent Sci. 2015; 10: 345-51.
Karakaya I., Cengiz-Yanardag E. Changes in Optical Characteristics and Surface Topography of CAD/CAM Materials after Bleaching Applications: An AFM Evaluation. J Prosthodont. 2020; 29: 226-36.
Wendler M., Kaizer M.R., Belli R., Lohbauer U., Zhang Y. Sliding contact wear and subsurface damage of CAD/CAM materials against zirconia. Dent Mater. 2020; 36: 387-401.
Strasser T., Preis V., Behr M., Rosentritt M. Roughness, surface energy, and superficial damages of CAD/CAM materials after surface treatment. Clin Oral Investig. 2018; 22: 2787-97.
Backer A.D., Münchow E.A., Eckert G.J., Hara A.T., Platt J.A., Bottino M.C. Effects of Simulated Gastric Juice on CAD/CAM Resin Composites-Morphological and Mechanical Evaluations. J Prosthodont. 2017; 26: 424-31.
Fathy S.M., Swain M. V. In-vitro wear of natural tooth surface opposed with zirconia reinforced lithium silicate glass ceramic after accelerated ageing. Dent Mater. 2018; 34: 551-59.
Tinastepe N., Malkondu O., Iscan I., Kazazoglu E. Effect of home and over the contour bleaching on stainability of CAD/CAM esthetic restorative materials. J Esthet Restor Dent. 2020; (April): 1-11.
Rea F.T., Roque A.C.C., Macedo A.P., de Almeida R.P. Effect of carbamide peroxide bleaching agent on the surface roughness and gloss of a pressable ceramic. J Esthet Restor Dent. 2019; 31: 451-56.
Karakaya I., Cengiz E. Effect of 2 Bleaching Agents with a Content of High Concentrated Hydrogen Peroxide on Stained 2 CAD/CAM Blocks and a Nanohybrid Composite Resin: An AFM Evaluation. Biomed Res Int. 2017; 2017: 1-11.
Demir N., Karci M., Ozcan M. Effects of 16% Carbamide Peroxide Bleaching on the Surface Properties of Glazed Glassy Matrix Ceramics. Biomed Res Int. 2020; 2020: 1-7.
Attin T., Hannig C., Wiegand A., Attin R. Effect of bleaching on restorative materials and restorations - A systematic review. Dent Mater. 2004; 20: 852-61.
Sharafeddin F., Kowkabi M., Shoale S. Evaluation of the effect of home bleaching agents on surface microhardness of different glass-ionomer cements containing hydroxyapatite. J Clin Exp Dent. 2017; 9: 1075-80.
Hubbezoglu I., Akaoǧlu B., Dogan A., et al. Effect of bleaching on color change and refractive index of dental composite resins. Dent Mater J. 2008; 27: 105-16.
Kamangar S.S.H., Kiakojoori K., Mirzaii M., Fard M.J.K. Effects of 15% carbamide peroxide and 40% hydrogen peroxide on the microhardness and color change of composite resins. J Dent (Tehran). 2014; 11: 196-209.
Curtis A.R., Palin W.M., Fleming G.J.P., Shortall A.C.C., Marquis P.M. The mechanical properties of nanofilled resin-based composites: Characterizing discrete filler particles and agglomerates using a micromanipulation technique. Dent Mater. 2009; 25: 180-87.
da Silva E.M., Gonçalves L., Guimarães J.G.A., Poskus L.T., Fellows C.E. The diffusion kinetics of a nanofilled and a midifilled resin composite immersed in distilled water, artificial saliva, and lactic acid. Clin Oral Investig. 2011; 15: 393-401.
Bailey S.J., Swift E.J. Effects of home bleaching products on composite resins. Quintessence Int (Berl). 1992; 23: 489-94.
Türker S.B., Bişkin T. The effect of bleaching agents on the microhardness of dental aesthetic restorative materials. J Oral Rehabil. 2002; 29: 657-61.
Campos I., Briso A.L.F., Pimenta L.A.F., Ambrosano C. Effects of Bleaching with Carbamide Peroxide Gels on Microhardness of Restoration Materials. J Esthet Restor Dent. 2003;15: 175-83.
García-Godoy F., García-Godoy A., García-Godoy F. Effect of bleaching gels on the surface roughness, hardness, and micromorphology of composites. Gen Dent. 2002; 50: 247-50.
Nathoo S.A., Chmielewski M.B., Kirkup R.E. Effects of Colgate Platinum Professional Toothwhitening System on microhardness of enamel, dentin, and composite resins. Compend Contin Educ Dent. 1994; 17: 627-30.
Mujdeci A., Gokay O. Effect of bleaching agents on the microhardness of tooth-colored restorative materials. J Prosthet Dent. 2006; 95: 286-89.
Taher N.M. The effect of bleaching agents on the surface hardness of tooth colored restorative materials. J Contemp Dent Pract. 2005; 6: 18-26.
Pruthi G., Jain V., Kandpal H.C., Mathur V.P., Shah N. Effect of Bleaching on Color Change and Surface Topography of Composite Restorations. Int J Dent. 2010; 2010: 1-7.
Yap A.U.J., Tan S.H.L., Wee S.S.C., Lee C.W., Lim E.L.C., Zeng K.Y. Chemical degradation of composite restoratives. J Oral Rehabil. 2001; 28: 1015-21.
Lambert H., Durand J.C., Jacquot B., Fages M. Dental biomaterials for chairside CAD/CAM: State of the art. J Adv Prosthodont. 2017; 9: 486-95.
Vichi A., Fabian Fonzar R., Goracci C., Carrabba M., Ferrari M. Effect of finishing and polishing on roughness and gloss of lithium disilicate and lithium silicate zirconia reinforced glass ceramic for CAD/CAM systems. Oper Dent. 2018; 43: 90-100.
Moraes R.R., Marimon J.L.M., Schneider L.F.J., Correr Sobrinho L., Camacho G.B., Bueno M. Carbamide peroxide bleaching agents: Effects on surface roughness of enamel, composite and porcelain. Clin Oral Investig. 2006;10: 23-8.
Li Q., Yu H., Wang Y. Colour and surface analysis of carbamide peroxide bleaching effects on the dental restorative materials in situ. J Dent. 2009; 37: 348-56.