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| Keywords: DentalResearch 005.jpg Dr Raphael L Bowen director of the American Dental Association Health Foundation ADAHF Paffenbarger Research Center PRC at NBS consults with a volunteer patient in the center's 5-year clinical trial of an adhesive material to bond composite restorations to dentin and enamel Bowen who invented a dental resin known as BIS-GMA also is developing glass inserts for composite restorations which will improve their wear resistance and reduce leakage around such restorations National Institute of Standards and Technology 5/1/1973 National Institute of Standards and Technology PD-USGov-NIST PD-USGov National Bureau of Standards National Institute of Standards and Technology Plastics Rubber industry Dentistry | ||||
