Effect of Various Curing Lights on the Degree of Cure of Orthodontic AdhesivesAmerican Journal of Orthodontics and Dentofacial Orthopedics
Format of Original3 p.
AbstractIntroduction: The purpose of this study was to compare the percentage degree of cure (%DC) of orthodontic adhesive resins irradiated with 3 types of light sources of various intensities: plasma arc, halogen, and light-emitting diode (LED). Methods: Twenty maxillary incisor stainless steel brackets (0.018-in slot) were divided into 4 groups of 5 brackets each. A standardized amount of composite resin was applied to each bracket base, simulating its clinical application. The brackets were light-cured with a halogen light for 20 seconds (10 seconds each from the incisal and cervical bracket edges), an LED light for 20 seconds (10 seconds per edge), a plasma light for 10 seconds (5 seconds per edge), and an LED light for 10 seconds (5 seconds per edge). The %DC was assessed by using micro-multiple internal reflectance Fourier transform infrared spectroscopy, and the results were analyzed with 1-way ANOVA. Results: Overall, the LED and the halogen lights, with the 20-second regimen, produced higher %DC. No significant difference was found in %DC between the plasma light and the 10-second LED light, whereas both showed lower %DC compared with 20 seconds of halogen or LED light. Conclusions: Significant variations in %DC are associated with the various light-curing units, which must be considered in selecting the light source and the irradiation time.
Citation InformationMarkus Niepraschk, Christos Rahiotis, T. Gerard Bradley, Theodore Eliades, et al.. "Effect of Various Curing Lights on the Degree of Cure of Orthodontic Adhesives" American Journal of Orthodontics and Dentofacial Orthopedics (2007) ISSN: 1097-6752
Available at: http://works.bepress.com/t_bradley/9/