Teeth

Dental Problems
The exact cause of dental disease in rabbits is unclear, although it is likely to be multifactorial and involve the following:
 * Inadequate teeth wear due to insufficient coarse fiber in the diet.
 * Nutritional deficiency, including calcium, vitamin D, vitamin A, magnesium and protein.
 * Genetic disposition&mdash;Netherland Dwarfs and lop-eared rabbits with flat faces seem to be especially susceptible.

Here are some more links to read about dental problems in rabbits.
 * Rabbit Welfare Association & Fund, Dental Problems in Rabbits
 * Dana Krempels, Ph.D., Dental Disease in Rabbits: A Simple Overview
 * Kathy Smith, Dental Challenges
 * MediRabbit, Common dental disorders of rabbits
 * VeterinaryPartner.com, Susan Brown, DVM, Rabbit Dental Disease
 * San Diego House Rabbit Society, Open Wide!
 * Examiner.com, Phyllis O'Beollain, Dental disease in rabbits: what to expect
 * Angela M. Lennox, DVM, Diplomate ABVP (Avian), Brief Overview of Dental Disease in Pet Rabbits
 * Fight for Fibre, Gallery

Drooling
The medical term for drooling is ptyalism.

See the links below for more information about drooling in rabbits.
 * MediRabbit, Differential Diagnosis for Ptyalism
 * MediRabbit, Esther van Praag, Ph.D., Excessive secretion of saliva and coughing

Malocclusion
Malocclusion occurs when a rabbit's teeth do not meet each other properly. See the main article for more details.

Molar Spurs
A good picture of what dental spurs look like in a rabbit that will require filing aka "floating" can be seen here.