The American Dental Association
Please see http://www.ada.org/public/topics/alpha.asp for more information about a huge variety of dental topics including proper care of your gums and teeth, dental anxiety, and a wide range of dental services.
The Academy of General Dentistry
Please see http://www.agd.org/consumer/resources.asp for more information about a variety of dental topics.
None of the above are intended to be taken as medical or dental advice. Please consult a physician or dentist for proper care. There is no substitute for one-on-one clinical evaluation and treatment by a qualified practitioner.