Title of article :
Comparative Study of the Shear Bond Strength of Flowable Composite in Permanent Teeth Treated with Conventional Bur and Contact or Non-Contact Er:YAG Laser
Author/Authors :
Parhami، Parisa نويسنده School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran , , Pourhashemi، Seyed Jalal نويسنده Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran , , Ghandehari Motlagh، Mehdi نويسنده School of Dentistry, Pediatric Dentistry , , Mighani، Ghasem نويسنده Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran , , Chiniforush، Nasim نويسنده ,
Issue Information :
فصلنامه با شماره پیاپی سال 2014
Pages :
6
From page :
140
To page :
145
Abstract :
Introduction:The aim of this study was to evaluate and compare the in vitro effect of the Erbium-Doped Yttrium Aluminum Garnet (Er:YAG) laser with different radiation distances and high-speed rotary treatment on the shear bond strength of flowable composite to enamel of human permanent posterior teeth . Methods : freshly extracted human molar teeth with no caries or other surface defects were used in this study (n=45). The teeth were randomly divided into 3 groups. Group 1: treated with non-contact Er:YAG Laser and etched with Er:YAG laser, Group 2: treated with contact Er:YAG Laser and etched with Er:YAG laser, Group 3 (control): treated with diamond fissure bur and etched with acid phosphoric 37 % . Then the adhesive was applied on the surafces of the teeth and polymerized using a curing light appliance. Resin cylinders were fabricated from flowable composite. Shear bond strength was tested at a crosshead speed of 0.5 mm/min. Results: The amount of Shear Bond Strength (SBS) in the 3 treatment groups was not the same (P < 0.05).The group in which enamel surfaces were treated with diamond fissure bur and etched with acid (conrtol group) had the highest mean shear bond strength (19.92±4.76) and the group in which the enamel surfaces were treated with contact Er:YAG laser and etched with Er:YAG laser had the lowest mean shear bond strength (10.89±2.89). Mann-whitney test with adjusted P-value detected significant difference in shear bond strength between the control group and the other 2 groups (P < 0.05). Conclusion: It was concluded that both contact and non-contact Er:YAG laser treatment reduced shear bond strength of flowable resin composite to enamel in comparison with conventional treatment with high speed rotary. Different Er:YAG laser distance irradiations did not influence the shear bond strength of flowable composite to enamel.
Journal title :
Journal of Lasers in Medical Sciences
Serial Year :
2014
Journal title :
Journal of Lasers in Medical Sciences
Record number :
1986050
Link To Document :
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