EFFECT OF ANTIOXIDANT TREATMENT AND DELAYED BONDING ON SHEAR BOND STRENGTH OF PORCELAIN LAMINATE VENEERS BONDED TO BLEACHED ENAMEL (IN VITRO STUDY) | ||
| Alexandria Dental Journal | ||
| Article 7, Volume 40, Issue 2, December 2015, Pages 173-179 PDF (3.23 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/adjalexu.2015.59148 | ||
| Authors | ||
| S Beltagui* ; S Bakry* ; S Hussein* ; M Mohy El Din* | ||
| Dentist, Faculty of Dentistry, Alexandria University, Egypt. | ||
| Abstract | ||
| Introduction: Porcelain laminate veneers are sometimes necessary after bleaching in patients requiring marked change in tooth color. Bonding following bleaching has been shown to be compromised. The use of an antioxidant agent and delayed bonding could improve bonding. Aim of the study: was to evaluate the effect of antioxidant treatment and delayed bonding, one week after bleaching, on the shear bond strength of porcelain laminate veneers bonded to bleached enamel in comparison with immediate bonding after bleaching. Materials and methods: Forty freshly extracted maxillary central incisors with flat enamel surfaces were prepared and divided into four groups (n=10/group). Three test groups were bleached with 40% hydrogen peroxide (Power Whitening) and one control group was left as unbleached enamel. Forty glass ceramic discs were fabricated using IPS e.max Press to be bonded to the enamel surface. Group A:antioxidant treated specimens. Bleached specimens were treated with an antioxidant agent, 10% sodium ascorbate, for 10 minutes then glass ceramic discs were bonded to the specimens. Group B:delayed bonded specimens. Bleached specimens were stored in artificial saliva for 7 days then glass ceramic discs were bonded to the specimens. Group C: immediate bonded specimens. Glass ceramic discs were immediately bonded to bleached specimens. Group D:control group. Glass ceramic discs were bonded to unbleached specimens. Dual cured resin cement (RelyX U200) was used for bonding. Following bonding, the specimens were thermocycled for 600 cycles corresponding to one clinical year service then tested for shear bond strength using a universal testing machine at a crosshead speed of 0.5 mm/min. Bond failure analysis was evaluated for the specimens using a stereomicroscope and random samples were chosen to be tested under a scanning electron microscope. Results: No significant difference was found between the control, delayed bonding and antioxidant treated group (p < 0.001). Immediately bonded group showed significantly lower mean bond strength with glass ceramic discs than all groups (p < 0.001). Conclusions: It is recommended to delay bonding for one week after bleaching or use 10% sodium ascorbate to reverse bleaching. | ||
| Keywords | ||
| antioxidant; delayed bonding; Shear bond strength; bleaching | ||
| References | ||
|
1. Griffiths CE, Bailey JR, Jarad FD, Youngson CC. An investigation into most effective method of treating stained teeth: An in vitro study. J Dent. 2008; 36: 54– 62.
2. Plotino G, Buono L, Grande NM, Pameijer CH, Somma F. Nonvital tooth bleaching: a review of the literature and clinical procedures. J Endod. 2008; 34: 394–407.
3. Sulieman M. An overview of tooth discoloration: extrinsic, intrinsic and internalized stains. Dent Update. 2005; 32: 463–71.
4. Sulieman M, Addy M, Rees J. Development and evaluation of a method in vitro to study the effectiveness of tooth bleaching. J Dent. 2003; 31: 415– 22.
5. 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.
6. Ma X, Li R, Sa Y, Liang S, Sun L, Jiang T, et al. Separate contribution of enamel and dentine to overall tooth colour change in tooth bleaching. J Dent. 2011; 39: 739–45.
7. Jarad FD, Griffiths CE, Jaffri M, Adeyemi AA, Youngson CC. The effect of bleaching, varying the shade or thickness of composite veneers on final colour: An in vitro study. J Dent. 2008; 36: 554–9.
8. Sung EC, Chan SM, Mito R, Caputo AA. Effect of carbamide peroxide bleaching on the shear bond strength of composite to dental bonding agent enhanced enamel. J Prosthet Dent. 1999; 82: 595–9.
9. Tashkandi E. Effect of surface treatment on the microshear bond strength to zirconia. Saudi Dent J. King Saud University; 2009; 21: 113–6.
10. Krejci I, Lutz F, Reimer M. Marginal adaptation and fit of adhesive ceramic inlays. J Dent. 1993; 21: 39–46.
11. Gökçe B, Çömlekoǧlu ME, Özpinar B, Türkün M, Kaya AD. Effect of antioxidant treatment on bond strength of a luting resin to bleached enamel. J Dent. 2008; 36: 780–5.
12. Rüttermann S, Braun A, Janda R. Shear Bond Strength and Fracture Analysis of Human vs. Bovine Teeth. PLoS One. 2013; 8.
13. Silva JMG da, Botta AC, Barcellos DC, Pagani C, Torres CRG. Effect of antioxidant agents on bond strength of composite to bleached enamel with 38% hydrogen peroxide. Mater Res. Materials Research; 2011; 14: 235–8.
14. Danesh-Sani S, Esmaili M. Effect of 10% sodium ascorbate hydrogel and delayed bonding on shear bond strength of composite resin and resin-modified glass ionomer to bleached enamel. J Conserv Dent. 2011; 14: 241.
15. García-Godoy F, Dodge WW, Donohue M, O’Quinn JA. Composite resin bond strength after enamel bleaching. Oper Dent. 18: 144–7.
16. Kaya AD, Türkün M, Arici M. Reversal of compromised bonding in bleached enamel using antioxidant gel. Oper Dent. 33: 441–7.
17. Titley KC, Torneck CD, Smith DC CR, Microscopy AA. Scanning electron microscopy observations on the penetration and structure on the resin tags in bleached and unbleached bovine enamel. J Endodont. 1991; 17: 72–5.
18. Türkün M, Kaya AD. Effect of 10% sodium ascorbate on the shear bond strength of composite resin to bleached bovine enamel. J Oral Rehabil. 2004; 31: 1184–91.
19. Türkün M, Celik EU, Kaya AD, Arici M. Can the hydrogel form of sodium ascorbate be used to reverse compromised bond strength after bleaching? J Adhes Dent. 2009; 11: 35–40.
20. Kimyai S, Valizadeh H. The effect of hydrogel and solution of sodium ascorbate on bond strength in bleached enamel. Oper Dent. Operative Dentistry, Inc; 2006; 31: 496–9.
21. Unlu N, Cobankara FK, Ozer F. Effect of elapsed time following bleaching on the shear bond strength of composite resin to enamel. J Biomed Mater Res B Appl Biomater. 2008; 84: 363–8.
22. Borges AB, Rodrigues JR M AL. The influence of bleaching agents on enamel bond strength of a composite resin according to the storage time. Rev Odontol. 2007; 36: 77–83.
23. Lai SCN, Tay FR, Cheung GSP, Mak YF, Carvalho RM, Wei SHY, et al. Reversal of compromised bonding in bleached enamel. J Dent Res. 2002; 81: 477–81.
24. Hegedüs C, Bistey T, Flóra-Nagy E, Keszthelyi G, Jenei A. An atomic force microscopy study on the effect of bleaching agents on enamel surface. J Dent. 1999; 27: 509–15.
25. Zhao H, Li X, Wang J, Qu S, Weng J, Zhang X. Characterization of peroxide ions in hydroxyapatite lattice. J Biomed Mater Res. 2000; 52: 157–63.
26. Torres CRG, Borges AFK& AB. The effects of antioxidant agents as neutralizers of bleaching agents on enamel bond strength. Brazilian J Oral Sci. Piracicaba Dental School - UNICAMP; 5: 971–6.
27. Braga RR, Meira JBC, Boaro LCC, Xavier TA. Adhesion to tooth structure: A critical review of “macro” test methods. Dent Mater. 2010; 26: 38–49.
28. Lin J, Shinya A, Gomi H, Shinya A. Effect of selfadhesive resin cement and tribochemical treatment on bond strength to zirconia. Int J Oral Sci. 2010; 2: 28– 34.
29. Viotti RG, Kasaz A, Pena CE, Alexandre RS, Arrais CA, Reis AF. Microtensile bond strength of new selfadhesive luting agents and conventional multistep systems. J Prosthet Dent. 2009; 102: 306–12. | ||
|
Statistics Article View: 141 PDF Download: 448 |
||
