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http://dx.doi.org/10.5395/JKACD.2002.27.6.561

EFFECT OF LIGHT SOURCE AND SHADE ON DEPTH OF CURE OF COMPOSITES  

Na, Joon-Sok (Dept. of Conservative Dentistry, College of Dentistry, DSRI, Chonnam National University)
Jeong, Sun-Wa (Dept. of Dentistry, College of Medicine, Seonam University)
Hwang, Yun-Chan (Dept. of Conservative Dentistry, College of Dentistry, DSRI, Chonnam National University)
Kim, Sun-Ho (Dept. of Conservative Dentistry, College of Dentistry, DSRI, Chonnam National University)
Yun, Chang (Dept. of Conservative Dentistry, College of Dentistry, DSRI, Chonnam National University)
Oh, Won-Mann (Dept. of Conservative Dentistry, College of Dentistry, DSRI, Chonnam National University)
Hwang, In-Nam (Dept. of Conservative Dentistry, College of Dentistry, DSRI, Chonnam National University)
Publication Information
Restorative Dentistry and Endodontics / v.27, no.6, 2002 , pp. 561-568 More about this Journal
Abstract
Purpose of this research is estimating polymerization depth of different source of light. XL 3000 for halo-gen light, Apollo 95E for plasma arc light and Easy cure for LED light source were used in this study. Different shade (B1 & A3) resin composites (Esthet-X, Dentsply, U.S.A.) were used to measure depth of cure. 1, 2, and 3 mm thick samples were light cured for three seconds, six seconds or 10 seconds with Apollo 95E and they were light cured with XL-3000 and Easy cure for 10 seconds, 20 seconds, or 40 seconds. Vicker's hardness test carried out after store samples for 24 hours in distilled water. Results were as following. 1. Curing time increases from al1 source of lights, oui$.$ing depth increased(p<0.05). 2. Depth (that except 1mm group and 2mm group which lighten to halogen source of light) deepens in all groups, Vickers hardness decreased(p<0.05). 3. Vicker's hardness of A3 shade composite was lower in all depths more than B1 shade composites in group that do polymerization for 10 seconds and 20 seconds using halogen source of light(p<0.05), but group that do polymerization lot 40 seconds did not show difference(p>0.05). 4. Groups that do polymerization using Plasma arc and LED source of light did not show Vicker's hardness difference according to color at surface and 1mm depth(p>0.05), but showed difference according to color at 2mm and 3mm depth(p<0.05). The results showed that Apollo 95E need more polymerization times than manufacturer's recommendation (3 seconds), and Easy cure need polymerization time of XL-3000 at least.
Keywords
Curing depth; Plasma Arc; LED light;
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