%0 Journal Article
%T Comparison of temperature rise in the pulp chamber with different light curing units: An in-vitro study
%A Rajesh Ebenezar A
%A Anilkumar R
%A Indira R
%A Ramachandran S
%J Journal of Conservative Dentistry
%D 2010
%I Medknow Publications
%X Aims/Objectives : This in vitro study was designed to measure and compare the temperature rise in the pulp chamber with different light curing units. Materials and Methods : The study was done in two settings-in-vitro and in-vivo simulation. In in-vitro setting, 3mm and 6mm acrylic spacers with 4mm tip diameter thermocouple was used and six groups were formed according to the light curing source- 3 Quartz-Tungsten-Halogen (QTH) units and 3 Light-Emitting-Diode (LED) units. For the LED units, three modes of curing like pulse-cure mode, fast mode and ramp mode were used. For in-vivo simulation, 12 caries free human third molar tooth with fused root were used. K-type thermocouple with 1 mm tip diameter was used. Occlusal cavity was prepared, etched, rinsed with water and blot dried; bonding agent was applied and incremental curing of composite was done. Thermal emission for each light curing agent was noted. Results : Temperature rise was very minimal in LED light cure units than in QTH light cure units in both the settings. Temperature rise was minimal at 6mm distance when compared to 3 mm distance. Among the various modes, fast mode produces the less temperature rise. Temperature rise in all the light curing units was well within the normal range of pulpal physiology. Conclusion : Temperature rise caused due to light curing units does not result in irreversible pulpal damage.
%K LED units
%K QTH units
%K temperature rise
%U http://www.jcd.org.in/article.asp?issn=0972-0707;year=2010;volume=13;issue=3;spage=132;epage=135;aulast=Rajesh