| Summary: | Neðst á síðunni er hægt að nálgast greinina í heild sinni með því að smella á hlekkinn View/Open OBJECTIVES: The aim of this study was to evaluate the quality of curing lights used in dental offices, using depth of cure (DOC) and light intensity measurements. METHODS: A random sample of 10% of dental offices in Iceland were visited and their curing lights tested. Light intensity of the curing lights was determined with a curing radiometer. Furthermore, two different resin composites, Tetric Ceram (TC) and Heliomolar (HM), were cured for 20 seconds. Depth of cure was recorded with scraping method in compliance with ISO standards. Associations between measured light output and DOC were calculated. RESULTS: 37 curing lights were tested, 20 QuartzTungsten Halogen lamps and 17 LED's. Output from four curing light units (11%) measured below 200 mW/cm2. 19% of the lights had output below the recommended 300 mW/cm2. The mean light output was 527 mW/cm2. The mean DOC for LED lights measured 2,11 mm and 1,90 mm for halogen lights. This difference was, however, not significant (t-test). The mean DOC for HM was 1,66 mm and 2,35 mm for TC. This difference was significant (p<0.05). A significant correlation was observed between light intensity and depth of cure with Pearson’s r=0,78 for HM and r=0,92 for TC (p<0.001). RESULTS: A regression model was built with the outcome variable „depth of cure”. Independent variables: „light intensity”; „type of material”; and „type of light” (LED; QTH) were entered into the model. The variables: „light intensity”; and „type of material” reached significance in the model (p<0,001), while the variable describing either a LED light or a halogen type light failed to reach significance. CONCLUSION: 81% of curing lights tested showed light intensity equal to or over 300mW/cm2. Curing radiometer can be used to evaluate depth of cure for both QTH and LED lights as no statistical difference was recorded for the type of light. Markmið: Mikilvægi plastfyllingarefna fer hratt vaxandi í ...
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