RE: Why are cats so prone to tooth resorption?

Rob Davis — Sat, 02 May 2020 09:13:27 GMT

The reported prevalence varies between around 25-75% in various studies. The differenced probably reflects the population sampled and the methods employed to diagnose. There is not doubt it is very common and is massively underdiagnosed and treated.

Aetiology sadly remains obscure. There is evidence of TR in 800 year old cat skulls and in wild felines, so it is not a new phenomenon (and it is important to remember that although more common in cats, it is seen in dogs too), although the prevalence appears to have increased since the 1960s. Many theories have been researched including viral infections, periodontal disease and both too low and too high dietary Calcium levels, but as yet we don't know.

As we don't know the cause, we don't currently have any useful means of prevention.

Previously treatment of early lesions with fluoride and more advanced lesions with restorations have been attempted but neither of these halt the progressive odontoclastic resorption so are no longer recommended. There was a small study showing that alendronate may be beneficial a few years ago, but I am not aware of any follow up work in this area.

Extraction remains the optimal treatment. In type 1 lesions the roots must be totally extracted. Crown amputations may be performed with type 2 lesions. It is only possible to distinguish these with radiography.

If you would like more detailed information there is a good article here.