00000ctm a22000003a 4500 UP-1685523046126152618 Buklod 20080909135506.0 m |o d | cr ||||||||||| 080909s xx d r |||| u| (iLib)UPMNL-00005127836 UPDent eng LG 993.5 1987 D4 F37 Fernandez, Stella Maris D. A qualitative analysis of the curing depth of visible light cured composite resin as determined by a color dye Stella Maris D. Fernandez, Ma. S. Rosanna G. Simpas. 34 leaves Seminar Paper--Doctor of Dental Medicine--University of the Philippines Manila. Class III cavity preparations were done on maxillary central incisors to receive visible light-cured composite fillings on either the mesial or distal surface. The teeth were then sectioned mesiodistally, passing the center of the restoration, and then immersed in a solution of copper phthalocyanine Astra Blue dye. The specimen were then examined under a stereo-microscope to locate areas of incomplete polymerization, as indicated by the blue-stained regions. It was found that visible light-cured composite fillings were completely polymerized to a depth of 3 mm., and that prolonging the exposure time from 20 seconds to 40 seconds did not show significant improvement in the degree of curing of the visible light-cured composite resin. Dental resins Curing. Composite resins. Acrylic resins. Materials testing. Simpas, Ma. S. Rossanna G. Macasaet, Avelino A. (Adviser). UPMNL DENT LG 993.5 1987 D4 F37 Thesis