G I Brinsden

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T o simulate the bluish-white fluorescence of natural teeth under ultraviolet light,‘-’ dental manufacturers use fluorophors of proprietary composition. Uranium oxides were often used in the past in combination with cerium to impart a realistic fluorescence to dental porcelain.* Uranium is no longer used as a result of increased awareness of possible(More)
1. The surface yielded by the acrylic resin formed against tinfoil provided better retention for the rubber base than any other surface tested. 2. Wax consistently gave the worst results in spite of careful boiling out. 3. The use of wax or asbestos spacers would not degrade the resin surface if tinfoil, or presumably the more easily obtainable aluminum(More)
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