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KMID : 0358920010280030363
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Journal of the Korean Academy of Pedodontics
2001 Volume.28 No. 3 p.363 ~ p.368
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A CLINICAL STUDY ON THE MAINTENANCE OF LIGHT INTENSITY OF VISIBLE-LIGHT CURING MACHINES FOR THE POLYMERIZATION OF COMPOSITE RESINS
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Lee Dong-Soo
Jeong Tae-Sung
Kim Shin
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Abstract
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It is well known that numerous factors influence the light output of curing units, but many dentists are un aware that the output of their curing lights are inadequate. This study was conducted to evaluate the light in tensity of visible-light curing units in some private dental clinics and hospital dental clinics. In order to determine the maximum light intensity of the curing units, lamps, filters and fiber optic bundles, they were replaced with new ones and light intensity was remeasured. Light intensity was measured by employing a digital radiometer (EFOS model #8000, USA). Light intensity ranged in (below ; 17.8%, : 46.6%, above ; 35.6%). The replacement of the components increased the light intensity, with maximum increases of 94.8% for lamps, 82.3% for filters, 200.8% for fiber optics and 361.5% for all three parts. According to the manufacturer of radiometer, curing light is considered as unsuitable for use with a reading of above by the radiometer. Applying these criteria to the present study, 64.4% of the curing units required repair or replacement. The results of this study indicated that the light intensities of the curing units used in dental practice were lower than optimum level.
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KEYWORD
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Light intensity, Light curing units, Radiometer, Maintenance
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