Influence of Er: Yag Laser on Shear Bond Strength of Self-etching Adhesives to Bovine Enamel: In vitro Study
Daphne Câmara Barcellos, Alessandra Buhler Borges, Carlos Rocha Gomes Torres, Sergio Eduardo de Paiva Gonçalves, Marcella Batista Pavanello, Ana Carolina Souza
Citation Information :
Barcellos DC, Borges AB, Torres CR, de Paiva Gonçalves SE, Pavanello MB, Souza AC. Influence of Er: Yag Laser on Shear Bond Strength of Self-etching Adhesives to Bovine Enamel: In vitro Study. World J Dent 2011; 2 (1):11-15.
The aim of this study was to evaluate the influence of the enamel treatment with Er:YAG laser on the bond strength of self-etching adhesives.
Materials and methods
One-hundred bovine incisors were ground to obtain flat enamel surfaces. The bond area was delimited with 3 mm diameter adhesive tape. Specimens were divided in two groups: Group L: Enamel surface received Er:YAG laser application (Kavo KEY 3) at 300 mJ/6 Hz in sweeping mode for 30 seconds; Group N: Enamel surface received no additional treatment. Each group was divided into five subgroups according to self-etching adhesive: S&E (Self & Etch), FB (Futurabond NR), XE (Xeno III), OU (One-Up bond F), CL (Clearfil SE Bond). Cylinders of Z250 composite were fabricated on the bonding area using a teflon matrix. The teeth were stored in water at 37°C/ 24 hours and submitted to shear testing at a speed of 1 mm/min.
Results
The results were analyzed by two-way ANOVA and Tukey's test, obtaining p-value = 0.001. The mean values (±SD) in MPa for each group/subgroup were: N/FB—19.65(±3.87)a; N/CL—19.55(±3.78)a; N/OU—15.57(±2.85)ab; N/XE—15.32(±4.00)b; L/CL— 13.91(±2.54)b; L/OU—13.16(±2.17)bc; L/XE—9.74(±1.65)cd; N/S&E—8.83(±2.63)d; L/FB—8.30(±2.27)d; L/S&E—6.56(±1.55)d.
Conclusion
It was concluded that the enamel surface treatment with Er:YAG laser reduced the bond strength significantly for most of the self-etching adhesives tested.
Dentistry for 21st century: Erbium: Yag laser for teeth. J Am Dent Assoc 1997;128:1-6.
Microleakage of class V composite restorations prepared conventionally with those prepare with an Er:YAG laser: A pilot study. Pediatr Dent 1993;15:425-26.
The effects of Er:YAG laser on enamel bonding of composite materials. SPIE Proc 1880;229-30.
Shear strength of composite bonded to Er:YAG laser-prepared dentin. J Dent Res 1996;75:599-605.
Removal of hard dental tissue (cavity preparation) with Er:YAG laser. In: 6th International Congress on Lasers in dentistry. Proceedings. Hawaii 1998;12-15.
Effects of a self-etching primer on enamel shear bond strengths and SEM morphology. Am J Dent 1997;10:141-46.
Bonding to ground dentin by Phenyl-P self-etching primer. J Dent Res 1994;73:1212-20.
Effect of two etching times on the sealing ability of Clearfil Liner Bond 2 in Class V restorations. Am J Dent 1997;10:66-70.
Influence of selfetching primer on the resin adhesion to enamel and dentin. Am J Dent 2001;14:205-10.
Bond strength related with the substratum and the etch. J Dent Res 1999;78:966.
Effect of 4-acryloxyethyltrimellitic acid in a self-etching primer on bonding to ground dentin. Dent Mater J 1996;15:132-43.
Experimental studies of the application of the Er:YAG laser on dental hard substances: Measurements of the ablation rate (I). Lasers Surg Med 1989;9:338-44.
Ultrastructural changes of enamel and dentin following Er:YAG laser radiation on teeth. Proc SPIE 1990;1200:408-15.
Effects of Er:YAG laser on enamel bonding of composite materials. Proc SPIE 1993;1880:163-68.
Wet versus dry enamel ablation by Er:YAG laser. J Prosthet Dent 1992;67(6):847-51.
Comparative study of influence on tensile bond strength of a composite to dentin using Er:YAG laser, air abrasion or turbine for preparation of cavities. J Clin Laser Med Surg 2001;19(4):199-202.
Effect of Er:YAG laser irradiation distance on superficial dentin morphology. Am J Dent. 2006;19(4):217-21.
Effects of Er:YAG laser on enamel bonding of composite materials. Lasers in orthopedic, Dental and Veterinary Medicine II Spie 1993;1880:163-68.
Differences in bonding to acid-etched or Er:YAG-laser-treated enamel and dentin surfaces. J Prosthet Dent 2000;84(3):280-88.
In vitro study of the Nd:YAG laser effect on human dental enamel: Optical and scanning electron microscope analysis. J Clin Laser Med Surg 1999;17(4):171-77.
Caries—preventive effect of Er:YAG laser irradiation with or without water mist. J Clin Laser Med Surg 2000;18(2):61-65.
Acid resistance of lased human enamel with Er:YAG laser. J CLin Laser Med Surg 1991;9(33):215-17.
Principles of Biochemistry. São Paulo: Savier, 1993.
Harper's Biochemistry. São Paulo: Atheneu, 1994.
pKa value and buffering capacity of acidic monomers commonly used in self-etching primers. J Adhes Dent 2003;8(3):143-50.
Inter-crystallite nanoretention of self etching adhesives an enamel imaged by transmission electron microscopy. Eur J Oral Sci 2002;110(6):464-70.
Aggressiveness of contemporary selfetching adhesives. Etching effects on unground enamel (Part II). Copenhagew Dent Mater 2001;17(5):430-44.
Effect Of self-etching primer application method on enamel bond strength. Amer J Dent 2002;15(2):412-16.
Interfacial ultrastructural of resin-enamel region of three adhesive systems. Amer J Dent 1998;11(1):13-16.
Bond strength to enamel and dentin conditioned by Er:YAG laser and self-etching adhesive. J Dent Res In: General Session of the IADR, 80/Annual Meeting of the AADR, 31/Annual Meeting of the CADR, San Diego; 2002.
