A survey of the effectiveness of dental light-curing units and a comparison of light testing devices

被引:21
作者
Dunne, SM
Davies, BR
Millar, BJ
机构
[1] Department of Conservative Dentistry, King's College, School of Medicine and Dentistry, London SE5 9RW, Caldecot Road
关键词
D O I
10.1038/sj.bdj.4809107
中图分类号
R78 [口腔科学];
学科分类号
1003 [口腔医学];
摘要
The aims of this study were to: 1. survey the light output from 49 light-curing units in clinical use; 2. measure the effect on depth of : cure of composite resin caused by a range of light outputs; 3. assess the relationship between radiometer meter readings and depth of cure of composite resin in a human tooth model and a Heliotest. The mean meter reading produced by the 49 lights surveyed using a lampChecker radiometer was 4.4 (+/- 2.4 SD), range 0.3 to 10.0. The manufacturer of the radiometer considers optimal light output to provide a meter reading within the range 5.0 to 7.0. Lights of very low output (0.7 +/- 0.1 SD) were found to be capable of curing, after 20 seconds, a 1.9 (+/- 0.3 SD) mm thickness of composite resin. However, only approximately 50% of this thickness can be considered fully cured. Increasing the cure time from 20 seconds to 60 seconds increased the mean depths of cure by a factor of approximately 1.4. The mean depths of cure of composite resin placed in the Heliotest were greater than those observed in the natural tooth model, by a factor of approximately 1.3. Correlation coefficients of meter readings and depth of cure were greater for the Efos Cure Rite and Demetron 100 radiometers than the lampChecker unit.
引用
收藏
页码:411 / 416
页数:8
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