3 links
Dental Caries
dental.mu.edu
Offers photo gallery showing various types of decay and describes treatment options.
European Organisation for Caries Research
orca-caries-research.org
ORCA promotes research into dental caries and related dieseases.
MedlinePlus: Dental Caries
nlm.nih.gov
Definition, causes, incidence, risk factors, symptoms and treatment.