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VOLUME 21 , ISSUE 2 ( February, 2020 ) > List of Articles


Effects of Antioxidants on the Shear Bond Strength of Orthodontic Brackets Bonded to Bleached Human Teeth: An In Vitro Study

Laila Baidas, Noura Al-Rasheed, Rufaidah Murad, Mohamed A Ibrahim

Keywords : Bleaching, Chamomile extract, Green tea, Metal orthodontic bracket, Shear bond strength, Sodium ascorbate

Citation Information : Baidas L, Al-Rasheed N, Murad R, Ibrahim MA. Effects of Antioxidants on the Shear Bond Strength of Orthodontic Brackets Bonded to Bleached Human Teeth: An In Vitro Study. J Contemp Dent Pract 2020; 21 (2):140-147.

DOI: 10.5005/jp-journals-10024-2759

License: CC BY-NC 4.0

Published Online: 01-06-2020

Copyright Statement:  Copyright © 2020; The Author(s).


Aim: The aim of this study was to evaluate the effects of different concentrations of sodium ascorbate (SA), green tea (GT), and chamomile (CM) on the shear bond strength (SBS) of metal orthodontic brackets bonded to teeth bleached with 40% hydrogen peroxide (HP). Materials and methods: Ninety-four sound premolars were divided into eight groups: group I (control + no bleaching), group II (bleaching + immediate bonding), group III (bleaching + 10% SA), group IV (bleaching + 35% SA), group V (bleaching + 0.5% GT), group VI (bleaching + 1% GT), group VII (bleaching + 0.5% CM), and group VIII (bleaching + 1% CM). In groups III–VIII, teeth were treated with the antioxidants for 10 minutes after bleaching with 40% HP, but before bonding. All the specimens were bonded with the resilience adhesive, and the SBS was tested with a universal testing machine (Instron 5965). The cross-head speed to break the bond was 1 mm/minute. The adhesive remnant index (ARI) was tested under 50× magnification. One-way analysis of variance, Tukey's post hoc, and Chi-squared tests were used for analysis (p ≤ 0.05). Results: The differences in SBS among the eight tested groups were highly significant (p < 0.001). Comparison of the eight groups using Tukey's post hoc test revealed significantly lower SBS (p < 0.001) in test groups II, III, IV, and VIII than in group I. Adhesive remnant index scores showed significant intergroup differences (p = 0.005). Most groups had a failure score of 1 (<50% of the bonding material adhering to the tooth), whereas groups II and VIII showed a failure score of 0 (no material adhering to the tooth). Conclusion: Bond strength can be enhanced by using 0.5% or 1% GT or 0.5% CM to allow bracket bonding immediately after bleaching. Clinical significance: The use of antioxidants would allow clinicians to bleach teeth before orthodontic treatment without delaying bonding.

  1. Gungor AY, Ozcan E, Alkis H, et al. Effects of different intra-coronal bleaching methods on shear bond strengths of orthodontic brackets. Angle Orthod 2012;82(5):942–946. DOI: 10.2319/111911-716.1.
  2. Haywood VB. Nightguard vital bleaching: current concepts and research. J Am Dent Assoc 1997;128(Suppl):19S–25S. DOI: 10.14219/jada.archive.1997.0416.
  3. Turkkahraman H, Adanir N, Gungor AY. Bleaching and desensitizer application effects on shear bond strengths of orthodontic brackets. Angle Orthod 2007;77(3):489–493. DOI: 10.2319/0003-3219(2007)077[0489:BADAEO]2.0.CO;2.
  4. Cavalli V, Reis AF, Giannini M, et al. The effect of elapsed time following bleaching on enamel bond strength of resin composite. Oper Dent 2001;26(6):597–602.
  5. Lai SC, Tay FR, Cheung GS, et al. Reversal of compromised bonding in bleached enamel. J Dent Res 2002;81(7):477–481. DOI: 10.1177/154405910208100709.
  6. Dishman MV, Covey DA, Baughan LW. The effects of peroxide bleaching on composite to enamel bond strength. Dent Mater 1994;10(1):33–36. DOI: 10.1016/0109-5641(94)90019-1.
  7. Cadenaro M, Breschi L, Antoniolli F, et al. Influence of whitening on the degree of conversion of dental adhesives on dentin. Eur J Oral Sci 2006;114(3):257–262. DOI: 10.1111/j.1600-0722.2006.00351.x.
  8. Bulut H, Turkun M, Kaya AD. Effect of an antioxidizing agent on the shear bond strength of brackets bonded to bleached human enamel. Am J Orthod Dentofacial Orthop 2006;129(2):266–272. DOI: 10.1016/j.ajodo.2004.03.043.
  9. Sasaki RT, Florio FM, Basting RT. Effect of 10% sodium ascorbate and 10% alpha-tocopherol in different formulations on the shear bond strength of enamel and dentin submitted to a home-use bleaching treatment. Oper Dent 2009;34(6):746–752. DOI: 10.2341/09-029-L.
  10. Torres CR, Koga AF, Borges AB. The effects of anti-oxidant agents as neutralizers of bleaching agents on enamel bond strength. Braz J Oral Sci 2006;5(16):971–976. DOI: 10.20396/bjos.v5i16.8641877.
  11. Arumugam MT, Nesamani R, Kittappa K, et al. Effect of various antioxidants on the shear bond strength of composite resin to bleached enamel: an in vitro study. J Conserv Dent 2014;17(1):22–26. DOI: 10.4103/0972-0707.124113.
  12. Kadiyala A, Saladi HK, Bollu P, et al. Effect of different anti-oxidants on shear bond strength of composite resins to bleached human enamel. J Clin Diagn Res 2015;9(11):ZC40–ZC43. DOI: 10.7860/JCDR/2015/16140.6790.
  13. Aksakalli S, Ileri Z, Karacam N. Effect of pine bark extract on bond strength of brackets bonded to bleached human tooth enamel. Acta Odontol Scand 2013;71(6):1555–1559. DOI: 10.3109/00016357.2013.776108.
  14. Berger SB, Carreira RPS, Guiraldo RD, et al. Can green tea be used to reverse compromised bond strength after bleaching? Eur J Oral Sci 2013;121(4):377–381. DOI: 10.1111/eos.12062.
  15. Berger SB, Guiraldo RD, Lopes MB, et al. Effects of green tea on the shear bond strength of orthodontic brackets after in-office vital bleaching. Gen Den 2016;64(3):72–75.
  16. Sharafeddin F, Farshad F, Azarian B, et al. Effect of green tea extract as antioxidant on shear bond strength of resin composite to in-office and home-bleached enamel. J Dent Biomater 2016;3(3):269–275.
  17. Gogia H, Taneja S, Kumar M, et al. Effect of different antioxidants on reversing compromised resin bond strength after enamel bleaching: an in vitro study. J Conserv Dent 2018;21(1):100–104. DOI: 10.4103/JCD.JCD_325_16.
  18. Ismail E, Kilinc E, Hardigan P, et al. Effect of two-minute application of 35% sodium ascorbate on composite bond strength following bleaching. J Contemp Dent Pract 2017;18(10):847–880. DOI: 10.5005/jp-journals-10024-2142.
  19. Freire A, Durski MT, Ingberman M, et al. Assessing the use of 35 percent sodium ascorbate for removal residual hydrogen peroxide after in-office tooth bleaching. J Am Dent Assoc 2011;142(7):836–841. DOI: 10.14219/jada.archive.2011.0273.
  20. Kimyai S, Oskoee SS, Rafighi A, et al. Comparison of the effect of hydrogel and solution forms of sodium ascorbate on orthodontic bracket-enamel shear bond strength immediately after bleaching: an in vitro study. Indian J Dent Res 2010;21(1):54–58. DOI: 10.4103/0970-9290.62818.
  21. Dabas D, Patil AC, Uppin VM. Evaluation of the effect of concentration and duration of application of sodium ascorbate hydrogel on the bond strength of composite resin to bleached enamel. J Conserv Dent 2011;14(4):356–360. DOI: 10.4103/0972-0707.87197.
  22. Artun J, Bergland S. Clinical trials with crystal growth conditioning as an alternative to acid-etch enamel pretreatment. Am J Orthod 1984;85(4):333–340. DOI: 10.1016/0002-9416(84)90190-8.
  23. Alrafaa AA, Bilal R, AlShahrani I. Does the antioxidant treatment affect the shear bond strength of orthodontic brackets: an in vitro study. J Pak Med Assoc 2019;69(1):82–86.
  24. Shamsedin M, Arash V, Jahromi M, et al. Efficacy of quercetin flavonoid in recovering the postbleaching bond strength of orthodontic brackets: a preliminary study. J Orthod Sci 2017;6(1):17–20. DOI: 10.4103/2278-0203.197394.
  25. Bishara SE, Sulieman AH, Olson M. Effect of enamel bleaching on the bonding strength of orthodontic brackets. Am J Orthod Dentofacial Orthop 1993;104(5):444–447. DOI: 10.1016/0889-5406(93)70070-5.
  26. Uysal T, Sisman A. Can previously bleached teeth be bonded safely using self-etching primer systems? Angle Orthod 2008;78(4):711–715. DOI: 10.2319/0003-3219(2008)078[0711:CPBTBB]2.0.CO;2.
  27. McCracken MS, Haywood VB. Demineralization effects of 10 percent carbamide peroxide. J Dent 1996;24(6):395–398. DOI: 10.1016/0300-5712(95)00113-1.
  28. Soares DG, Ribeiro AP, Sacono NT, et al. Mineral loss and morphological changes in dental enamel induced by a 16% carbamide peroxide bleaching gel. Braz Dent J 2013;24(5):517–521. DOI: 10.1590/0103-6440201302225.
  29. Freire A, Souza EM, Caldas DBM, et al. Reaction kinetics of sodium ascorbate and dental bleaching gel. J Dent 2009;37(12):932–936. DOI: 10.1016/j.jdent.2009.07.008.
  30. Briso AL, Toseto RM, Rahal V, et al. Effect of sodium ascorbate on tag formation in bleached enamel. J Adhes Dent 2012;14(1):19–23. DOI: 10.3290/j.jad.a21492.
  31. McKay DL, Blumberg JB. A review of the bioactivity and potential health benefits of chamomile tea (Matricaria recutita L.). Phytother Res 2006;20(7):519–530. DOI: 10.1002/ptr.1900.
  32. Basting RT, Rodrigues Jr AL, Serra MC. The effects of seven carbamide peroxide bleaching agents on enamel microhardness over time. J Am Dent Assoc 2003;134(10):1335–1342. DOI: 10.14219/jada.archive.2003.0047.
  33. Rice-Evans CA, Miller NJ, Bolwell PG, et al. The relative antioxidant activities of plant derived polyphenolic flavonoids. Free Radic Res 1995;22(4):375–383. DOI: 10.3109/10715769509145649.
  34. Chan EW, Soh EY, Tie PP, et al. Antioxidant and antibacterial properties of green, black, and herbal teas of Camellia sinensis. Pharmacognosy Res 2011;3(4):266–272. DOI: 10.4103/0974-8490.89748.
  35. Park EH, Bae WY, Eom SJ, et al. Improved antioxidative and cytotoxic activities of chamomile (Matricaria chamomilla) florets fermented by Lactobacillus plantarum KCCM 11613P. J Zhejiang Univ Sci B 2017;18(2):152–160. DOI: 10.1631/jzus.B1600063.
  36. Durgesh BH, Al Kheraif AA, Torky MA, et al. The impact of herbal mouth rinse on the bond strength of orthodontic brackets: an in vitro study. Oral Health Dent Manag 2014;13(4):1056–1059.
  37. Sadr Lahijani MS, Raoof Kateb HR, Heady R, et al. The effect of German chamomile (Marticaria recutita L.) extract and tea tree (Melaleuca alternifolia L.) oil used as irrigants on removal of smear layer: a scanning electron microscopy study. Int Endod J 2006;39(3):190–195. DOI: 10.1111/j.1365-2591.2006.01073.x.
  38. Valenzuela S, Pons-Fuster A, Lopez-Jornet P. Effect of a 2% topical chamomile application for treating burning mouth syndrome: a controlled clinical trial. J Oral Pathol Med 2016;45(7):528–533. DOI: 10.1111/jop.12412.
  39. Singh O, Khanam Z, Misra N, et al. Chamomile (Matricaria chamomilla L.): an overview. Pharmacogn Rev 2011;5(9):82–95. DOI: 10.4103/0973-7847.79103.
  40. Olsen ME, Bishara SE, Damon P, et al. Evaluation of scotchbond multipurpose and maleic acid as alternative methods of bonding orthodontic brackets. Am J Ortho Dentofacial Orthop 1997;111(5):4 98–501. DOI: 10.1016/S0889-5406(97)70286-5.
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