MedlinePlus: Dental Caries 
Definition, causes, incidence, risk factors, symptoms and treatment.
http://www.nlm.nih.gov/medlineplus/ency/article/001055.htmTooth Decay and Cavity Prevention 
A collection of information, publications and news from NIDCR.
http://www.nidr.nih.gov/health/newsandhealth/caries.asp
European Organisation for Caries Research 
ORCA promotes research into dental caries and related dieseases.
http://www.orca-caries-research.org/
Dental Caries 
Offers photo gallery showing various types of decay and describes treatment options.
http://www.dental.mu.edu/oralpath/lesions/caries/caries.htm
Dental Caries Clinical Resources 
Features links to medical resources on the causes, diagnosis and treatment of dental carries. Includes information on diagnostic guidelines and clinical trials.
http://cchs-dl.slis.ua.edu/clinical/oral/tooth/tooth-cavities.htm
Dental Cavities 
The University of Maryland Medical Center offers an overview with information on the causes, treantment and prevention of tooth decay.
http://www.umm.edu/ency/article/001055.htm
Moving From a Mechanical Approach to a Preventive Model 
Information provided by the University of Illinois at Chicago School of Dentistry, Department of Periodontics. Features a review of the professional literature and includes information on general dental health.
http://www.uic.edu/classes/peri/peri343/
Teeth: Dental Caries and Pulp Disease 
Find information on the incidence, etiology and histopathology of carious lesions.
http://www.usc.edu/hsc/dental/opath/Chapters/Chapter08_Main.html