There is a definite relationship between the dietary consumption of su
crose and the incidence of dental caries. Noncaloric sucrose substitut
es for use in the sweetening of foods, beverages, and medicines may be
either synthetic compounds or natural products. In the United States,
four potently sweet artificial sweeteners are approved, namely, sacch
arin, aspartame, acesulfame potassium, and sucralose. Highly sweet pla
nt constituents are used in Japan and some other countries, including
the diterpene glycoside stevioside and-the protein thaumatin. Recent p
rogress in a research project oriented towards the discovery and evalu
ation of novel potentially noncariogenic sweeteners from plants has fo
cused on substances in the sesquiterpenoid, diterpenoid, triterpenoid,
steroidal saponin, and proanthocyanidin structural classes. The feasi
bility of using Mongolian gerbil electrophysiological and behavioral a
ssays to monitor the sweetness of plant extracts, chromatographic frac
tions, and pure isolates has been investigated. An in vivo cariogenici
ty study on the commercially available natural sweeteners stevioside a
nd rebaudioside A has been carried out. (C) 1998 John Wiley & Sons, In
c.