Effects of Different Concentrations of Phosphoric Acid Etching on the Micro-Tensile Bond Strength of Fluorosed Enamel

doi:10.13701/j.cnki.kqyxyj.2017.01.012

Abstract

Abstract: Objective: To evaluate the effect of different concentrations of phosphoric acid etching on the micro-tensile bonding strength of fluorosed enamel. Methods:The specimens were divided into four groups: thirty health teeth in the control group and ninty fluorosed teeth in three experimental groups. The three experimental groups were divided mild group, moderated fluorosis group and severe fluorosis group by TFI standard. Each group was divided into three sub-groups by different concentrations of phosphoric acid treatment. The micro-tensile bonding strength (MTBS) was tested and the enamel surfaces were observed by SEM. Results:The MTBS in fluorosis group was lower than that in the control group (P<0.05). The bonding strength was significantly different when enamels were treated with different concentrations of phosphoric acid (P<0.05). For fluorosis teeth, the MTBS was the highest when treated with 40% acid. However, for the normal teeth, the MTBS was the highest when treated with 45% acid. Conclusion: The MTBS in the fluorosed group was lower than that of the control group. The bonding strength of dental fluorosis can be altered by etching with different concentrations of acid, but excessively high concentration of acid can conversely lead to an apparent decline of bonding strength.

Key words: Phosphoric, acid, Dental, fluorosis, Enamel, Bonding, strength

CLC Number:

R783.9

LV Lin-hu,ZHOU Hui,LI jia-ling,GUO Ling. Effects of Different Concentrations of Phosphoric Acid Etching on the Micro-Tensile Bond Strength of Fluorosed Enamel[J]. Journal of Oral Science Research, 2017, 33(1): 51-54.

References

[1] 张爱君.氟斑牙的形成机制[J].中国地方病防治杂志,2011,29(1)∶16-20
[2] Celik EU, Yildiz G, Yazkan B. Comparison of enamel microabrasion with a combined approach to the esthetic management of fluorosed teeth [J]. Oper Dent,2013,38(5)∶E134-143
[3] Auschill TM, Schmidt KE, Arweiler NB. Resin Infiltration for Aesthetic Improvement of Mild to Moderate Fluorosis: A Six-month Follow-up Case Report [J]. Oral Health Prev Dent,2015,13(4)∶317-322
[3] Toman M, Cal E, Türkün M, et al. Bond strength of glass-ceramics on the fluorosed enamel surfaces [J]. J Dent,2008,36(4)∶281-286
[4] Vamsilatha K, Venkata KM, Aileni KR, et al. Efficacy of New Adhesion Promoters on Compromised Hypocalcified Enamel [J] . J Clin Diagn Res,2015,9(7)∶ZC09-11
[5] Shida K, Kitasako Y, Burrow MF, et al. Micro-shear bond strengths and etching efficacy of a two-step self-etching adhesive system to fluorosed and non-fluorosed enamel [J]. Eur J Oral Sci,2009,117(2)∶182-186
[6] Suma S, Anita G, Chandra Shekar BR, et al.The effect of air abrasion on the retention of metallic brackets bonded to fluorosed enamel surface [J]. Indian J Dent Res,2012,23(2)∶230-235
[7] Ermis RB, De Munck J, Cardoso MV, et al. Bonding to ground versus unground enamel in fluorosed teeth [J]. Dent Mater,2007,23(10)∶1250-1255
[8] Silva-Benítez EL, Zavala-Alonso V, Martinez-Castanon GA, et al. Shear bond strength evaluation of bonded molar tubes on fluorotic molars [J]. Angle Orthod,2013,83(1)∶152-157
[9] 叶运莉,刘娅,张青碧,等.古蔺县地氟病区居民氟斑牙患病及影响因素分析[J].现代预防医学, 2013, 29(8)∶1411-1413
[10] Shafiei F, Jowkar Z, Fekrazad R, et al. Micromorphology analysis and bond strength of two adhesives to Er,Cr:YSGG laser-prepared vs. bur-prepared fluorosed enamel [J]. Microsc Res Tech,2014,77(10)∶779-784
[11] Torres-Gallegos I, A Martinez-Castaon G, Loyola-Rodriguez JP, et al. Effectiveness of bonding resin-based composite to healthy and fluorotic enamel using total-etch and two self-etch adhesive systems [J]. Dent Mater J,2012,31(6)∶1021-1027
[12] Zarif Najafi H, Moshkelgosha V, Khanchemehr A, et al. The Effect of Four Surface Treatment Methods on the Shear Bond Strength of Metallic Brackets to the Fluorosed Enamel [J]. J Dent (Shiraz),2015,16(3)∶251-259
[13] Waidyasekera PG, Nikaido T, Weerasinghe DD, et al. Bonding of acid-etch and self-etch adhesives to human fluorosed dentine [J]. J Dent,2007,35(12)∶915-922
[14] Sudsangiam S, van Noort R. Do dentine bond strength tests serve a useful purpose [J]. J Dent, 1999,13(1)∶57-67
[15] Fejerskov O, Richards A, DenBesten P. The effect of fluoride on tooth mineralization. In: Fejerskov O, Ekstrand, Burt B,editors. Fluoride in dentistry [J]. J. Copenhagen:Munksgaard, 1996,26(6)∶112-146
[16] Isci D, Sahin Saglam AM, Alkis H, et al. Effects of fluorosis on the shear bond strength of orthodontic brackets bonded with a self-etching primer [J]. Eur J Orthod,2011,33(2)∶161-166
[17] Porto IM, Saiani RA, Chan KL, et al. Organic and inorganic content of fluorotic rat incisors measured by FTIR spectroscopy [J]. Spectrochim Acta A Mol Biomol Spectrosc,2010,77(1)∶59-63
[18] Küükesmen C, Snmez H. Microleakage of class-v composite restorations with different bonding systems on fluorosed teeth [J]. Eur J Dent,2008,2(1)∶48-58