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:: Volume 22, Issue 2 (Foll Text in Persian 2010) ::
J Iran Dent Assoc 2010, 22(2): 120-126 Back to browse issues page
Evaluation of monomer elution from two dentin bonding agents cured with halogen and LED lights
Hasan Kermanshah, Masomeh Hasani-Tabatabaei *1, Hasan Sereshti, Mehdi Azadi
1- , hasanita@sina.tums.ac.ir
Abstract:   (13270 Views)

 Evaluation of monomer elution from two dentin bonding agents cured with halogen and LED lights

 

  Dr. Kermanshah H .,1 Dr. Hasani-Tabatabaei M ., 2 Dr. Sereshti H .,3 Dr. Azadi M .4

  1 Assistant Professor, Department of Restorative, School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran. 2 Associate P rofessor, Department of Restorative Dentistry, School of Dentistry. Tehran University of Medical Sciences. Tehran, Iran . 3 Assistant Professor, School of Chemistry, College of Sciences, Tehran University.

  Tehran, Iran. 4 Dentist. .

  (Received 31 Oct, 2009 Accepted 19 July, 2010)

 Abstract

  

  Background and Aim : Polymerization of resin-based dental materials is not complete and the release of unreacted monomers has undesirable effects on biocompatibility and integrity of material. The aim of this study was to evaluate the type and effect of dentin bonding agents, type of light curing unit, the distance between the tip of curing unit and surface of bonding agents on monomer leaching.

  Materials and Methods : This experimental study used 40 sound extracted teeth, with prepared cavities about 3x3x2 and 3x3x4 mm on the smooth surfaces. A self-etch bonding (Clearfil SE Bond Curary, Japan) and one etch and rinse (Scotch Bond multipurpose, USA) were applied on cavities according to the manufacturer’s instruction. The bonding agents were cured with halogen (Optilux 501, Colten) and LED (Ultalume 2, Vivadent) lights. The samples were saved in pure methanol with 37 ° C for 24h. Liquids were studied with gas chromatography (GC) for detection of different monomers. Data were analyzed using 3-Way ANOVA and Independent T-tests.

  Results : The type of bonding agent had significant effect on monomer release. Scotch Bond released more monomer than Clearfil SE Bond (P=0.001). The effect of light curing unit on monomer leaching was not significant, but the samples of Scotch Bond with more distance released more monomer. Only HEMA monomer was detected from dentin bonding agents in this study.

  Conclusion : Scotch Bond released more HEMA than Clearfil SE Bond. Halogen and LED lights had no significant effect on monomer leaching. More distance between the tips of light causes less degree of polymerization.

 Key words: Bonding – Monomer - Polymerization.

  

  Corresponding Author: Dr. Hasani-Tabatabaei M . , Associate P rofessor, Department of Restorative Dentistry, School of Dentistry. Tehran University of Medical Sciences. Tehran, Iran .

  

  e.mail: hasanita@sina.tums,ac.ir

 

Keywords: Bonding, Monomer, Polymerization
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Type of Study: Research | Subject: Restorative Dentistry
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Kermanshah H, Hasani-Tabatabaei M, Sereshti H, Azadi M. Evaluation of monomer elution from two dentin bonding agents cured with halogen and LED lights. J Iran Dent Assoc 2010; 22 (2) :120-126
URL: http://jida.ir/article-1-747-en.html


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Volume 22, Issue 2 (Foll Text in Persian 2010) Back to browse issues page
Journal of Iranian Dental Association

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