Final answer:
Stannous fluoride does not contain abrasives and cannot substitute for them in dentifrices; rather, it is used for its antimicrobial properties and ability to prevent dental caries. Abrasives are responsible for plaque removal and tooth polishing. Stannous fluoride contributes to enamel strength and decay prevention.
Step-by-step explanation:
The statement that stannous fluorides contain abrasives and can be used as substitutes for dentifrices is false. Abrasives, which make up a significant part of toothpaste, are utilized mainly to remove plaque and help in the polishing of teeth. They include compounds like aluminum hydroxide, calcium carbonate, and silica. On the other hand, stannous fluoride, which is an active ingredient in some toothpastes, is valued for its efficacy in preventing dental caries and controlling gingivitis due to its antimicrobial properties. However, stannous fluoride itself does not act as an abrasive.
Fluoride, a key component in toothpaste, chemically interacts with the enamel in the teeth and is essential for cavity prevention and the remineralization process. Moreover, stannous fluoride strengthens enamel against acids produced by oral microbes and has a bacteriostatic effect, reducing acid production that leads to tooth decay. While stannous fluoride can contribute to some surface staining, it is primarily used for its beneficial effects on dental enamel and is not a substitute for the abrasive components necessary for the mechanical cleaning process achieved by abrasives in dentifrices.