Factors Affecting the Energy Delivered to Simulated Class I and Class V Preparations(11)

On 2010年08月11日 by Richard B.T. Price Resource：JCDA.com Hits：

ghts in private practice.⁴⁷ It is recognized that only one unit of each type of curing light was used in this study and that longer exposure times would deliver more energy. However, the irradiance delivered by each light was considered representative for the brand, and the curing lights selected for this study were thought to be representative of the wide variety of currently available models. Also, the exposure times used were those recommended by the manufacturers for curing a 2-mm increment of shade A3.5 or darker.

Conclusions

In this study, there was no difference between dentists and fourth-year dental students in their ability to deliver energy to a simulated preparation. However, the amount of energy delivered by individual operators varied widely, with a range from 2.6 J/cm² up to 20.4 J/cm². Furthermore, individual operators delivered different amounts of energy to Class I and Class V preparations with the same light units. Across all operators and light-curing units, significantly lower energy density was delivered to the Class V preparation than to the Class I preparation.

THE AUTHORS

	Dr. Price is a professor in the department of dental clinical sciences, Dalhousie University, Halifax, Nova Scotia.
	Mr. Felix is a research assistant in the department of dental clinical sciences, Dalhousie University, Halifax, Nova Scotia.
	Dr. Whalen is an assistant professor in the department of chemistry, Dalhousie University, Halifax, Nova Scotia.

Acknowledgements: The authors would like to thank Mr. J. Fahey for his statistical support. The manufacturers of the curing lights used in this study are acknowledged for their kind donations. This project was supported by Dalhousie University.

Dr. Price and Mr. Felix are the inventors of the Managing Accurate Resin Curing (MARC) device. Dalhousie University owns and has applied for a patent for this device. Dalhousie University has licensed the MARC device to BlueLight analytics inc., Halifax, NS.

Correspondence to: Dr. Richard Price, Department of dental clinical sciences, Dalhousie University, Halifax, NS B3H 1W2.

This article has been peer reviewed.

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