Improvement in working environment of wet rotary cast trimmer by means of light-emitting diode light bulbs

Abstract

Purpose:The aim of the present study was to evaluate the irradiance of light-emitting diode (LED) light bulbs seated around the abrasive grinding disc of a wet laboratory cast trimmer for the enhancement of environmental brightness. Methods: A total of 12 LED light bulbs were set up along the inner framework of a rotary cast trimmer. The irradiance of the bulbs was determined with a spectral radiometer. Results: The spectral irradiance mean of 12 LED light bulbs in the cast trimmer was 37.3 µW/cm 2 and the value was significantly greater than that of the control. The irradiance median of the 9787 LED light bulb varied from 640.3 µW/cm 2 for 0 mm distance to 79.4 µW/cm 2 for 200 mm distance. Analysis revealed that irradiance was not statistically affected by the bulb-sensor vertical distances within 50 mm. Conclusion:The working environment, especially brightness, around a dental stone cast placed on the trimmer stage can be improved considerably through the use of the LED light bulbs.