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:: Volume 24, Issue 3 (7-2012) ::
J Iran Dent Assoc 2012, 24(3): 139-145 Back to browse issues page
Comparison of Temperature Rise in Silorane-Based and Methacrylate-Based Composites Cured by LED and Argon Laser
Masomeh Hasani Tabatabaei1 , Mohammad Etrati Khosroshahi2 , Ayub Pahlavan1 , Sakineh Arami3 , Sara Valizadeh * 4
1- Associate Professor, Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran
2- Professor, Department of Biomedical Engineering, Amirkabir University of Technology. Tehran, Iran
3- Assistant Professor, Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran
4- Operative Dentist , valizadeh.sara@yahoo.com
Abstract:   (10743 Views)

  Background and Aim : Temperature rise occurs during photoactivation of dental composites due to the exothermic polymerization reaction and different curing units. The aim of this study was evaluation of temperature rise in two kinds of composites with different curing units .

  Materials and Methods : In this experimental study, five samples of each composite resin (Filtek Z250, Filtek P90) were placed in two-millimeter deep Teflon molds which were 4mm in diameter. Curing was done from top surface with LED, high power LED and argon laser and temperature was recorded by a thermometer placed under the samples. After reaching room temperature, samples were cured and the temperature was recorded again. The time of maximum temperature was also recorded. The data were analyzed by two-way ANOVA and Tukey HSD .

  Results : Composites and curing units had statistically significant influence on the temperature rise (p<0.001) Silorane-based composites showed significantly higher temperature rise than methacrylate-based ones. A significantly lower rise in temperature occurred when illuminationwas performed by argon laser. There was no significant difference in temperature rise between the two types of LEDs. The type of composite had no effect on the time of maximum temperature and in all samples the maximum temperature was recorded at the beginning of irradiation . 

  Conclusion : Silorane-based composites showed higher temperature rise than methacrylate-based ones. Argon laser revealed less heat than LEDs. The maximum temperature rise was recorded at the beginning of irradiation .

 

Keywords: Polymerization, Temperature, Gas Laser, Filtek Silorane, Methacrylate
Full-Text [PDF 168 kb]   (2902 Downloads)    
Type of Study: Original | Subject: Restorative Dentistry
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Hasani Tabatabaei M, Etrati Khosroshahi M, Pahlavan A, Arami S, Valizadeh S. Comparison of Temperature Rise in Silorane-Based and Methacrylate-Based Composites Cured by LED and Argon Laser. J Iran Dent Assoc 2012; 24 (3) :139-145
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Volume 24, Issue 3 (7-2012) Back to browse issues page
Journal of Iranian Dental Association

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