Citation Information :
Vojdani M, Torabi K, Rasaeipour S, Khaledi AA, Ghodsi S. Evaluation of the Effect of a Home-bleaching Agent on the Surface Characteristics of Indirect Esthetic Restorative Materials: Part I—Roughness. J Contemp Dent Pract 2014; 15 (3):326-330.
Pressing esthetic demands of good looking make people undergo bleaching procedures. However, the effect of bleaching agents on esthetic restorative materials with different surface preparations has been poorly studied.
Aim
The aim of this study was to examine the effect of a homebleaching agent (carbamide peroxide: CP 38%) on the surface roughness of the polished fiber reinforced composite (FRC), overglazed, autoglazed, or polished ceramic samples.
Materials and methods
Twenty standardized cylindrical specimens were made of each of the following groups: overglazed, autoglazed, polished porcelain and also FRC. The test specimens exposed to the CP 38%, 15 minutes, twice a day for 2 weeks according to the manufacturer's recommendation. Six samples from each group were selected randomly to form negative controls. Surface roughness measurements (Ra, micrometer) for baseline, test and control specimens were performed by use of a profilometer. Paired t-test, Mann-Whitney test, and Kruskal-Wallis test were used for statistical analyses.
Results
The data showed that bleaching with CP 38% significantly increased the surface roughness of all the test samples (p < 0.05). The type of surface preparation caused significant differences between the susceptibility of porcelain subgroups to bleaching (p < 0.05). The polished porcelain specimens showed the highest changes after bleaching.
Conclusion
CP 38% significantly increases the surface roughness of the porcelains and FRC. The type of surface condition affects the amenability of the porcelain surface to the bleaching agent. Glazed porcelains were more resistant to roughness than the polished porcelains and also the composite.
Clinical significance
Roughening of porcelain and FRC occur following bleaching procedure. No special surface preparation of indirect esthetic restorative materials can completely preserve these materials from adverse effects of bleaching agents.
How to cite this article
Torabi K, Rasaeipour S, Khaledi AA, Vojdani M, Ghodsi S. Evaluation of the Effect of a Homebleaching Agent on the Surface Characteristics of Indirect Esthetic Restorative Materials: Part I—Roughness. J Contemp Dent Pract 2014;15(3):326-330.
Double-layer color effects in porcelain systems. J Dent Res 1985;64(6):940-943.
Bleaching teeth: new materials—new role. J Am Dent Assoc 1987 Dec;44E-52E.
Complete dental bleaching. Quintessence Publishing Co, Inc Chicago 1995;p.165.
Effect of different peroxide bleaching regimens and subsequent fluoridation on the hardness of human enamel and dentin. J Prosthet Dent 2004;92(4):337-342.
Carbamide peroxide bleaching agents: effects on surface roughness of enamel, composite and porcelain. Clin Oral Investing 2006;10(1):23-28.
The effect of different bleaching agents on the surface texture of restorative materials. Oper Dent 2006;31(4):473-480.
Effect of bleaching gels on the surface roughness, hardness and micromorphology of composites. Gen Dent 2002 May-June;50(3):247-250.
Higherconcentration carbamide peroxide effects on surface roughness of composites. J Esthet Restor Dent 2002;14(2):92-96.
Effects of home bleaching products on composite resins. Quintessence Int 1992;23(7):489-494.
Effect of three bleaching agents on the surface properties of three different esthetic restorative materials. J Prosthet Dent 2003;89(5):466-473.
Evaluation of surface roughness of glazed and polished ceramic surface on exposure to fluoride gel, bleaching agent, and aerated drink: an in vitro study. J Indian Prosthodontic Society 2006;6(3):128-132.
J Prosthet Dent 2004;92(2):179-183.
A SEM evaluation of a 6% hydrogen peroxide tooth whitening gel on dental materials in vitro. J Dent 32 Suppl 2004;1:35-39.
The effect of bleaching agents on the microhardness of dental aesthetic restorative materials. J Oral Rehabil 2002;29(7):657-661.
History, safety and effectiveness of current bleaching techniques and applications of the nightguard vital bleaching technique. Quintessence Int 1992;23(7):471-488.
Restorative considerations with vital tooth bleaching. J Am Dent Assoc 1997;128 Suppl:60S-64S.
The effect of a bleaching system on properties related to different ceramic surface textures. J Prosthodont 2009;18(3):223-229.
Salivary pH changes during 10% carbamide peroxide bleaching. Quintessence Int 1994;25(8):547-550.
The effects of temperature and bleaching gels on the properties of tooth-colored restorative materials. J Prosthet Dent 2011;105(2):100-117.
Peroxide bleaches: effect on tensile strength of composite resins. J Prosthet Dent 1993;69(3):247-249.
Composite resin color change after vital tooth bleaching. J Prosthet Dent 1992;67(6):778-781.
Effects of home bleaching preparations on composite resin color. J Prosthet Dent 1992;68(4):575-578.
Removing brown stain from teeth. Ariz Dent J 1966;15;12(4):13-15.
Effect of carbamide peroxide on composite resins. Quintessence Int 1991;22(10):817-821.
The effect of home bleaching agents on the surface roughness of tooth-colored restoratives with time. Oper Dent 2004;29(4):398-403.
The effect of 2 different bleaching regimens on the surface roughness and hardness of tooth-colored restorative materials. Quintessence Int 2007;38(2):e83-87.
Reflectance and texture changes in bleached composite resin surfaces. J Esthet Dent 1996;8(5):229-233.
Effects of in-office bleaching products on surface finish of tooth-colored restorations. Oper Dent 2003;28(1):15-19.
Tooth bleaching chemicals: influence on teeth and restorations. J Dent Res 1990;69 (Abstract 1558):303-313.