Journal of Iranian Dental Association
J Iran Dent Assoc
Medical Sciences
http://jida.ir
23
journal23
2383-3041
10.52547/jida
en
jalali
1391
4
1
gregorian
2012
7
1
24
3
online
1
fulltext
en
Comparison of Temperature Rise in Silorane-Based and Methacrylate-Based Composites Cured by LED and Argon Laser
Restorative Dentistry
Restorative Dentistry
Original
Original
<p align="center"></p>
<p> <strong><i> Background and Aim </i></strong><strong>: </strong>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 .</p>
<p> <strong><i> Materials </i></strong><strong><i>and </i></strong><strong><i>Methods </i></strong><strong>: </strong>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 .</p>
<p><i> <strong><i> Results </i></strong><strong>: </strong>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 <i>.<strong> </strong></i></i></p>
<p><i> <strong><i> Conclusion </i></strong><strong>: </strong>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 . </i></p>
<p></p>
Polymerization , Temperature , Gas Laser , Filtek Silorane , Methacrylate
139
145
http://jida.ir/browse.php?a_code=A-10-1-620&slc_lang=en&sid=1
Masomeh
Hasani Tabatabaei
2300319475328460020133
2300319475328460020133
No
Associate Professor, Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran
Mohammad
Etrati Khosroshahi
2300319475328460020134
2300319475328460020134
No
Professor, Department of Biomedical Engineering, Amirkabir University of Technology. Tehran, Iran
Ayub
Pahlavan
2300319475328460020135
2300319475328460020135
No
Associate Professor, Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran
Sakineh
Arami
2300319475328460020136
2300319475328460020136
No
Assistant Professor, Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran
Sara
Valizadeh
valizadeh.sara@yahoo.com
2300319475328460020137
2300319475328460020137
Yes
Operative Dentist