Abstract
Both visible light and chemical cured composite resins have been used in practice for rebuilding of the endodontically treated tooth.In this study, a new type of curing method, dual cure, was fundamentally evaluated. After the irradiation of light to the dual-cured and light-cured resin specimens, their degree of conversion were measured at several depth of the resin specimens by a Fourier transform infrared spectrometer having a microscope and the obtained values were compared with one another.The results were as follows:1. The maximum degree of conversion in dual-cured composite resin was 83% when irradiated for 90 seconds only from the top of the specimen and 92% in visible light-cured one for 90 seconds, 30 seconds from the top and 30 seconds each from the side walls bilaterally.2. There was an inhibition area of polymerization due to the existence of oxygen, up to about 1mm depth from the top of the specimens in both composite resins.3. The maximum degree of conversion in dual-cured resin without the irradiation, actually chemical cure only, amounted to 76% at all depth of the specimens.4. The irradiation from above only showed the highest degree of conversion at the shallow area in both dual-cured and visible light-cured resins. On the other hand, lateral irradiation resulted in the comparatively high degree of conversion at the wide area up to the deep layer.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
