Accession Number : AD0430427


Title :   INACTIVATION OF STANNOUS FLUORIDE BY CALCIUM PYROPHOSPHATE,


Corporate Author : SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX


Personal Author(s) : Shannon,Ira L ; Gibson,William A


Report Date : Dec 1963


Pagination or Media Count : 8


Abstract : A total of 240 extracted human teeth utilized in studying the compatibility of stannous fluoride with calcium pyrophosphate in water-glycerin solutions. The ability of 0.4% stannous fluoride solutions containing calcium pyrophosphate to protect against acid decalcification decreased significantly after 28 days. Over this period the protection afforded dropped from 44.2 to 14.4%. The presence of glycerin interfered with the protective performance of fresh solutions and led to a decrease in effectiveness with time that was not seen with purely aqueous solutions. These findings reaffirm that, while the performance of stannous fluoride was not significantly affected by the presence of stannous pyrophosphate, the incorporation of calcium pyrophosphate led to a significant degeneration in the ability of stannous fluoride to protect the enamel surface from acid decalcification. (Author)


Descriptors :   *TEETH , *INTERFERENCE , DISEASES , FLUORIDES , CALCIUM COMPOUNDS , TIN COMPOUNDS , PHOSPHATES , ALCOHOLS


Distribution Statement : APPROVED FOR PUBLIC RELEASE