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:: Volume 28, Issue 1 (Spring 2010) ::
J Dent Sch GYEAR__, 28(1): 1-6 Back to browse issues page
A comparative study of Acid and Laser Etching on Micro Shear Bond Strength of Enamel
Zahra Jaberi Ansari Corresponding Author: Dr. * , Reza Fekrazad Dr., Saeedeh Feizi Dr., Farnaz Younesian
Associate Professor , zjansari@dent.sbmu.ac.ir
Abstract:   (6317 Views)

Background and Aim: With the increase of laser application in different fields of dentistry, further research is required to evaluate it's efficiency in dental therapy. This study evaluated the effect of Er,Cr:YSGG laser conditioning of enamel on micro shear bond strength of composite ressin to human enamel following two different tooth preparation tools (Diamond Disk Versus Er, Cr: YSGG laser)

Materials & Methods: In this invitro study, 125 human third molars were randomly assigned into 5 groups. Buccal and lingual enamel slices were prepared as below: A) laser-ablated without etching, B) laser-ablated and laser-etched, C) laser-ablated and acid-etched, D) cut by diamond disk and laser-etched and E) cut by diamond disk and acid-etched. Tubs of Z100 composite resin (3M, Dental Product/ USA) were bonded to conditioned enamel surfaces after applying two layers of Single Bond (3M ESPE, Dental product/ USA) Shear bond strength was measured by Micro-Tensile tester (Bisco Inc/USA) at a cross-head speed of 0.5 mm/min. Data were analyzed by one-way ANOVA,and Tukey tests.

Results: Mean shear bond strengths in groops were : A= 23.14 ± 6.53 MPa,B= 23.77 ± 5.56 MPa,C= 23.51 ± 4.89 MPa,D= 19.30 ± 5.56 MPa and E= 28.99 ± 6.40 MPa ,respectively.The differences between (E,A),(E,B),(D,B),(C,D) and (D,E) were significant (P<0.05).

Conclusion: Micro shear bond strength of groups prepared by diamond disk and acid-etched were higher than groups prepared and etched by Er,Cr:YSGG laser.Therefore, re-etching with acid phosphoric is necessary if the laser used for tooth preparation or etching.

J Dent Sch 2010 28(1): 1 

Keywords: Micro Shear Bond Strength, Er, Cr:YSGG laser, Enamel
Full-Text [PDF 225 kb]   (1320 Downloads)    
Type of Study: Original Article | Subject: Special
Received: 2010/03/16
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Jaberi Ansari Z, Fekrazad R, Feizi S, Younesian F. A comparative study of Acid and Laser Etching on Micro Shear Bond Strength of Enamel. J Dent Sch. 2010; 28 (1) :1-6
URL: http://jds.sbmu.ac.ir/article-1-770-en.html

Volume 28, Issue 1 (Spring 2010) Back to browse issues page
مجله دانشکده دندانپزشکی دانشگاه علوم پزشکی شهید بهشتی Shahid Beheshti University Dental Journal
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