What is dental health like in animals?
If this is in comparison to humans, the animals are more or less free from the two common dental diseases by which teeth are lost in humans. These are dental caries (dental decay)  and periodontal disease (gum disease). 

Common to both the diseases is the biofilm which forms on the teeth known as dental plaque.

If the plaque is colonised by acidogenic (acid producing) micro organisms cavities are produced in the presence of refined carbohydrates.

The gum disease is produced by bacterial toxins from the plaque causing inflammation of the surrounding gum resulting in loss of supporting structures of the tooth including bone resulting in loosening and loss of teeth. 

In animals in the wild, plaque accumulation is effectively controlled by the coarse unprocessed diet which has a very good scrubbing effect. Besides wild animals are not exposed to refined carbohydrates like sugars. 

Hence wild animals do not have these two diseases. However domesticated animals on human diet are prone to similar diseases. 

In wild animals severe attrition (wear) and fracture of teeth are more common. 

Wild animals will not survive long without adequate number of functional teeth.