Comparison between shear bond strength of composite resin following surface conditioning with Er Cr YSGG laser and acid etch on the enamel surface in primary canines

Abstract

 Comparison between shear bond strength of composite resin following surface conditioning with Er Cr YSGG laser and acid etch on the enamel surface in primary canines

 

 

  Dr. Mahmodian J., ¹ Dr. Afshar H.,² Dr. D arvish H.,³ Dr. FekrAzad R.⁴

 ^ 

  ¹ Professor, Department of Pediatric Dentistry , School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran. ² Associate P rofessor, Department of Pediatric Dentistry ,^ School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran. ³ Dentist, Specialist in Pediatric Dentistry. ⁴ Assistant Professor, AJA University of Medical Sciences , Laser in Dentistry Research Center, School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran.

  

  (Received 22 June, 2010 Accepted 24 Jan, 2011)

 

  Abstract

  

  Background and Aim : In recent years with the introduction of laser in dentistry, numerous researches have been conducted to evaluate its efficacy for improving resin material bond on the enamel and dentin. Based on the available literature, no research has been performed on resin shearing bond strength by preparing the tooth surface with YSGG laser on the enamel of the primary teeth. The present study seeks to determine and compare resin shearing bond strength between two groups of surface preparation with acid etch and laser.

  Materials and Methods : Twenty primary canine teeth which were extracted for orthodontic purposes were collected and were halved with a diamond disc. Each of the halves was mounted in transparent acrylic resin. The teeth were then randomly divided into two groups in group 1, surface preparation was done with YSGG laser and in group 2, the teeth were prepared with acid etching. Next, the composite was put on the tooth surface by a plastic matrix and cured. The shearing bond strength was measured with instron. The collected data were analyzed using Student’s t-test and Kolmogorov-Smirnov statistical methods.

  Results : The average bond strength was 27.87 ± 6.136 mpa in the laser group (group 1) and 21.55 ± 5.62 mpa in the acid etch group (group 2) demonstrating a statistically significant difference between the two groups (p<0/05).

  Conclusion : It may be concluded that resin bond strength is significantly higher in group 1 (YSGG group) compared with Group 2 (acid etch group).

  Key words: YSGG laser – Shearing bond strength – Acid etching – Primary teeth – Composite resin

 

  Corresponding Author: Dr. Afshar H., Associate P rofessor, Department of Pediatric Dentistry ,^ School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran.

  e.mail: hoafshar@yahoo.com