The Etching Effect of Co2 Laser on The Shear Bond Strength of Bleached Teeth
Abstract
Background: Tooth discoloration is one of the great esthetic problems in dentistry, Despite vital bleaching, is often considered a first step to improve the appearance of teeth, reports are controversial about the effect of bleaching on the shear bond strengths (SBS) of brackets. Etching of enamel surface can be carried out by acid or laser, there was controversial about the efficiency of CO2 laser as enamel surface etchant
Objective: The aim of the present study is to detect if there is a significant reduction in SBS of bleached teeth, and to detect the effect of CO2 laser as etchant on both bleached and normal teeth.
Methods and materials: Forty non-carious first premolars are divided into 2 main groups: None- bleached (A) and Bleached (B) groups, of 20 specimens for each group, then the groups were subdivided into 2 subgroups (10 specimens for each subgroup). Group (B) teeth were bleached with chemically activated 40% hydrogen peroxide, while group (A) teeth were left without bleach- ing. The subgroups teeth (A1 and B1) were etched with CO2 laser and the subgroups (A2 and B2) were etched with 37% phosphoric acid. After bracket bonding, samples were then thermally cycled for 500 cycles between( 5°C and 55°C). Debonding was performed with a shearing force using the universal testing machine, then ANOVA and LSD test were used to specify if there was a significant difference between groups.
Results: there was the nonsignificant difference in mean SBS of both phosphoric acid etching and CO2 laser etching in both bleached and normal surface enamel specimens A and B groups. Whereas there was a significant difference in mean shear bond strength between the CO2 laser etched and the phosphoric acid etched groups with highest mean values in the phosphoric acid etched subgroups,
Conclusion: The results of this in vitro study suggest that hydrogen peroxide bleaching does not affect the shear bond strength of metal orthodontic brackets when bonding occurred 1 week after bleaching and CO2 laser etching has low shear bond strength values making it not suitable for clinical use.
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Sulieman M. An overview of tooth discoloration: extrinsic, intrinsic and internalized stains. Dent Update 2005;32:463- 464, 466-468, 471.
Hafez R, Ahmed D, Yousry M, El-Badrawy W, El- Mowafy O. Effect of In-Office Bleaching on Color and Surface Roughness of Composite Restoratives. Eur J Dent2010;4:118-127.
Miles PG, Pointier JP, Bahiraei D, Close J. The effect of carbamide peroxide bleach on the tensile bond strength of ceramic brackets: an in vitro study. Am J Orthod Dentofacial Orthop1994;106:371-375.
Tancan Uysal, Ayca Sisman; Can Previously Bleached Teeth Be Bonded Safely Using Self-etching Primer Systems? Angle Orthod 2008;78:711-715.
Haywood VB, Heymann HO. Nightguard vital bleaching. Quintessence Int 1989;20:173-176.
Titley K, Torneck CD, Smith DC. Effect of concentrated hydrogen peroxide solution on the surface morphology of cut human dentin. Endod Dent Traumatol 1988;4:32-6.
Cavalli V, Arrais CA, Giannini M, Ambrosano GM. High- concentrated carbamide peroxide bleaching agents effects on the enamel surface. J Oral Rehabil 2004;31:155-9.
Sung E C, Chan S M, Mito R, Caputo A A 1999 Effect of carbamide peroxide bleaching on the shear bond strength of composite to dental bonding agent enhanced enamel. Journal of Prosthetic Dentistry 82: 595–599.
Turkun M, Sevgican F, Pehlivan Y, Aktener B O 2002 Effects of 10% carbamide peroxide on the enamel surface morphology: a scanning electron microscopy study. Journal of Esthetic and Restorative Dentistry 14: 238–244.
Cacciafesta V, Sfondrini MF, Stefanelli P, Scribante A, Klersy C. The effect of bleaching on shear bond strength of brackets bonded with a resin-modified glass ionomer.Am J Orthod Dentofacial Orthop2006;130:83-87.
Bulut H, Kaya AD, Turkun M. Tensile bond strength of brackets after antioxidant treatment on bleached teeth. Eur J Orthod 2005;27:466-471.
Uysal T, Basciftci FA, Usumez S, Sari Z, Buyukerkmen A. Can previously bleached teeth be bonded safely? Am J Orthod Dentofacial Orthop2003;123:628-632.
Bishara SE, Sulieman AH, Olson M. Effect of enamel bleaching on the bonding strength of orthodontic brackets. Am J Orthod Dentofacial Orthop1993;104:444-447.
Josey AL, Meyers IA, Romaniuk K, Symons AL. The
effect of a vital bleaching technique on enamel surface morphology and the bonding of composite resin enamel. J Oral Rehabil 1996;23:244-250.
McGuckin RS, Thurmond BA, Osovitz S. Enamel shear bond strengths after vital bleaching. Am J Dent. 1992;5:216- 22.
Dishman MV, Covey DA, Baughan LW. The effects of peroxide bleaching on composite to enamel bond strength. Dent Mater. 1994;9:33-6.
Cavalli V, Reis AF, Giannini M, Ambrosano GMF. The effect of elapsed time following bleaching on enamel bond strength of resin composite. Oper Dent. 2001; 26:597-602.
Lee BS, Hsieh TT, Lee YL, Lan WH, Hsu YJ, Wen PH, et al. Bond strengths of the orthodontic bracket after acid-etched, Er: YAG laser-irradiated and combined treatment on the enamel surface. Angle Orthod 2003;73:565-70.
Gokcelik A, Ozer Y, Ozel E, Arhun N, Attar N, Firatli S, et al. The influence of Er: YAG laser conditioning versus self-etching adhesives with acid etching on the shear bond strength of orthodontic brackets. Photomed Laser Surg 2007;25:508-12.
Berk N, Başaran G, Ozer T. Comparison of sandblasting, laser irradiation, and conventional acid etching for orthodontic bonding of molar tubes. Eur J Orthod 2008;30:1839.
von Fraunhofer JA, Allen DJ, Orbell GM. Laser etching of enamel for direct bonding. Angle Orthod 1993;63:73-6.
Martínez-Insua A, Da Silva Dominguez L, Rivera FG, Santana-Penín UA. Differences in bonding to acid-etched or Er: YAG-laser-treated enamel and dentin surfaces. J Prosthet Dent 2000;84:280-8.
Uşümez S, Orhan M, Uşümez A. Laser etching of enamel for direct bonding with an Er, Cr: YSGG hydro kinetic laser system. Am J Orthod Dentofacial Orthop 2002;122:649-56.
Convissar R A. Principles and Practice of Laser Dentistry, 1st edition 2011 St. Louis: Mosby Elsevier.
Wilder-Smith P, Dang J, and Kurosaki T: Investigating the range of surgical effects on soft tissue produced by a carbon dioxide laser. JADA1997 May; 128; 583-588.
Ariyaratnam MT, Wilson MA, Mackie IC, Blinkhorn AS )1997( A comparison of surface roughness and composite/ enamel bond strength of human enamel following the application of the Nd: YAG laser and etching with phosphoric acid. Dent. Mater. 13: 51-55
Corpas-Pastor L, Moreno JV, Garrido JDDLG, Muriel VP, Moore K, et al. )1997( Comparing the tensile strength of brackets adhered to laser-etched enamel vs. acid-etched enamel. J Am Dent Assoc 128: 732-737.
Shahabi S, Brockhurst PJ, Walsh LJ )1997( Effect of tooth- related factors on the shear bond strengths obtained with CO2 laser conditioning of enamel. Aust Dent J 42: 81-84.
Melendez EJ, Arcoria CJ, Dewald JP, Wagner MJ )1992( Effect of laser etch on bond strengths of glass ionomers. J Prosthet Dent. 67: 307-312.
Walsh LJ, Ahood D, Brockhurst PJ )1994( Bonding of composite resin to carbon dioxide laser-modified human enamel. Dent Mater 10: 162-166.
Sokucu O, Siso SH, Ozturk F, Nalcaci R. Shear bond strength of orthodontic brackets cured with different light sources under thermocycling. Eur J Dent 2010; 4: 257- 62.
Wang WN, Meng CL, Tarng TH. Bond strength: A comparison between chemical coated and mechanical interlock basis of ceramic and metal brackets. Am J Orthod Dentofac Orthop1997; 111)4(: 374-81.
E. Öztaş, G. Bağdelen, H. Kılıçoğlu, H. Ulukapı and İ. Aydın. The effect of enamel bleaching on the shear bond strengths of metal and ceramic brackets. European Journal of Orthodontics34 )2012( 232–237.
Goldstein RE, Garber DA. Complete dental bleaching. Chicago: Quintessence; 1995.
Titley KC, Torneck C D, Ruse N D 1992 The effect of carbamide-peroxide gel on the shear bond strength of a microfilm resin to bovine enamel. Journal of Dental Research 71: 20–24.
Van der Vyder P J, Lewis S B, Marais J T 1997 The effect of bleaching agent on composite/enamel bonding. Journal of the Dental Association of South Africa 52: 601–603, 57.
Garcia-Godoy F, Dodge W W, Donohue M, O’Quinn J A 1993 Composite resin bond strength after enamel bleaching. Operative Dentistry 18: 144–147.
Stokes A N, Hood J A, Dhariwal D, Patel K 1992 Effect of peroxide bleaches on resin-enamel bonds. Quintessence International 23: 769–771.
Turkun M, Kaya A D 2004 Effect of 10% sodium ascorbate on the shear bond strength of composite resin to bleached bovine enamel. Journal of Oral Rehabilitation 31: 1184– 1191.
Uysal T, Basciftci F A, Usumez S, Sari Z, Buyukerkmen A 2003 Can previously bleached teeth be bonded safely? American Journal of Orthodontics and Dentofacial Orthopedics 123: 628–632.
Azevedo LH, Galletta VC, de Paula Eduardo C, de Sousa SO, Migliari DA.: Treatment of oral verrucous carcinoma with carbon dioxide laser. J Oral Maxillofac Surg. 2007 Nov; 65)11(:2361-2366.
Hamadah O, Thomson PJ.: Factors affecting carbon dioxide laser treatment for oral precancer: a patient cohort study. Lasers Surg Med. 2009 Jan; 41)1(:17-25.
Lim B, Smith A, Chandu A. Treatment of oral leukoplakia with carbon dioxide and potassium-titanyl-phosphate lasers: a comparison. J Oral Maxillofac Surg. 2010 Mar; 68)3(:597-601.
Ozdemir F, Cakan U, Gonul N, Cakan DG. Orthodontic bonding to acid- or laser etched pre-bleached enamel. good.2013.43.3.141.
Brauchli LM, Schramm A, Senn C, Ball J, Wichelhaus A, Laser Conditioning of Enamel with the Erbium YAG and the CO2 Laser. Bond Strength and Surface Structure. Dentistry 2011, 1:2.
Basir MM, Rezvani MB, Chiniforush N, Moradi Z. Effect of CO2, Nd: YAG and Er: YAG Lasers on Microtensile Bond Strength of Composite to Bleached-Enamel. The Open Dentistry Journal, 2016, 10, 148-157.
Fuhrmann R, Gutknecht N, Magunski A, Lampert F, Diedrich P. Conditioning of Enamel with Nd: YAG and CO2 Dental Laser Systems and with Phosphoric Acid. J Orofac Orthop. 2001;62:375–86.
Hedayatollahnajafi S, Staninec M, Watanabe L, Lee C, Fried D. Dentin bond strength after ablation using a CO2laser operating at high pulse repetition rates. In: Rechmann P, Fried D, editors. Lasers in dentistry XV, January 24, 2009, San Jose, Calif. Proc. SPIE 7162. Bellingham, Wash.: SPIE – The International Society for Optical Engineering, 2009:71620F-1 – 71620F-9.
Nguyen D, Chang K, Hedayatollahnajafi S, Staninec M, Chan K, Lee R, Fried D. High-speed scanning ablation of dental hard tissues with a λ = 9.3 μm CO2laser: Adhesion, mechanical strength, heat accumulation, and peripheral thermal damage. J Biomed Opt 2011;16)7(:071410-1 – 071410-9.
DOI: http://dx.doi.org/10.26477/idj.v39i3.129
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