Original Article

Effect of Different Surface Treatments on Microtensile Bond Strength of Composite Resin to Normal and Fluorotic Enamel after Microabrasion


Objectives: This study aimed to determine the effect of surface treatments such as tooth reduction and extending the etching time on microtensile bond strength (µTBS) of composite resin to normal and fluorotic enamel after microabrasion.
Materials and Methods: Fifty non-carious anterior teeth were classified into two groups of normal and fluorotic (n=25) using Thylstrup and Fejerskov index (TFI=4-6). Teeth in each group were treated with five modalities as follows and restored with OptiBond FL and Z350 composite resin: 1-Etching (30 seconds), bonding, filling (B); 2-Tooth reduction (0.3mm), etching, bonding, filling (R-B); 3-Microabrasion (120 seconds), etching, bonding, filling (M-B); 4- Microabrasion, tooth reduction, etching, bonding, filling (M-R-B); and 5- Microabrasion, etching (60 seconds), bonding, filling (M-2E-B). Ten experimental groups (n=5) were designed; 150 rectangular samples (10 in each group) with a cross-sectional area of 1×1mm2 were prepared for µTBS test. Failure mode was determined under a stereomicroscope and one specimen was selected from each group for scanning electron microscopy (SEM) analysis. Data were analyzed using two-way ANOVA and Tukey’s test.
Results: The µTBS to normal enamel was higher than to fluorotic enamel in all groups except for group (R-B). The Maximum and minimum µTBS were noted in the group (normal, reduction, bonding) and (fluorosed, microabrasion, bonding), respectively.  Tooth reduction increased µTBS more effectively than extended etching time after microabrasion.
Conclusions: Fluorosis may reduce µTBS of composite resin to enamel. Microabrasion reduced the bond strength. Tooth reduction and extended etching time increased µTBS of composite resin to both normal and fluorotic enamel.


- Abanto Alvarez J, Rezende KM, Marocho SM, Alves FB, Celiberti P, Ciamponi AL. Dental fluorosis: exposure, prevention and management. Med Oral Patol Oral Cir Bucal. 2009 Feb;14(2): E103-7.

- Segura A, Donly KJ, Wefel JS. The effect of microabrasion on demineralization inhibition of enamel surfaces. Quintessence Int. 1997 Jul;28(7): 463-6.

- Ratnaweera PM, Fukagawa N, Tsubota Y, Fukushima S. Microtensile bond strength of porcelain laminate veneers bonded to fluorosed teeth. J Prosthodont. 2009 Apr;18(3):205-10.

- McKay FS. The study of mottled enamel (dental fluorosis). J Am Dent Assoc. 1952 Feb;44(2):133-7.

- Donly KJ, O'Neill M, Croll TP. Enamel microabrasion: A microscope evaluation of the “abrasion effect”. Quintessence Int. 1992 Mar;23(3): 175-9.

- Al-Sugair MH, Akpata ES. Effect of fluorosis on etching of human enamel. J Oral Rehabil. 1999 Jun; 26(6):521-8.

- Duan Y, Chen X, Wu J. clinical comparison of bond failure using different enamel preparations of severely fluorotic teeth. J Clin Orthod. 2006 Mar; 40(3):152-4.

- Ermis RB, De Munck J, Cardoso MV, Coutinho E, Van Landuyt KL, Poitevin A, et al. Bonding to ground versus unground enamel in fluorosed teeth. Dent Mater. 2007 Oct;23(10):1250-5.

- Küçükeşmen C, Sönmez H. Microleakage of Cl V composite restorations with different bonding system on fluorosed teeth. Eur J Dent. 2008 Jan;2(1):48-58.

- Perdiago J, Geraldeli S, Carmo AR, Dutra HR. In vivo influence of residual moisture on microtensile bond strength of one bottle adhesives. J Esthet Restor Dent. 2002;14(1):31-8.

- Weerasinghe DS, Nikaido T, Wettasinghe KA, Abayakoon JB, Tagami J. Micro-shear bond strength and morphological analysis of a self-etghing primer adhesive system to fluorosed enamel. J Dent. 2005 May;33(5):419-26.

- Croll TP, Segura A, Donly KJ. Enamel microabrasion: New consideration in 1993. Pract Periodontics Aesthet Dent. 1993 Oct;5(8):19-28.

- Fejerskov O, Silverstone LM, Melsen B, Moller IJ. Histological features of fluorosed human dental enamel. Caries Res. 1975;9(3):190-210.

- Opinya GN, Pameijer CH. Tensile bond strength of fluorosed Kenyan teeth using the acid etch technique. Int Dent J. 1986 Dec;36(4):225-9.

- Summit JB, Robbins JW, Hilton TJ, Schwartz RS, Santos J. Fundamentals of operative dentistry, a contemporary approach. 3rd ed., Chicago, Quintessence, 2006:8.

IssueVol 13, No 6 (2016) QRcode
SectionOriginal Article
Fluorosis Dental Enamel Microabrasion Dental Bonding Composite Resins

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
How to Cite
Mohammadi Basir M, Rezvani MB, Tabatabai Ghomsheh E, Malek Hosseini Z. Effect of Different Surface Treatments on Microtensile Bond Strength of Composite Resin to Normal and Fluorotic Enamel after Microabrasion. Front Dent. 2017;13(6):431-437.