Welcome to the forum
@PipMiles .
Completely off topic but I was just switching between Facebook and the forum, and I think we just met over there as well on a 'sensor too cold' message.
Very deja-vu-ish confusion seeing the same name at the same time in both places!
And more on topic, no experience myself, I had lost many of my teeth well before diabetes. But diabetics are more prone to tooth decay. High numbers not only increase glucose in blood, but also in other body fluids like tears and saliva.
So if you've had diabetes for a long time, your teeth have had a harder time than if you hadn't had diabetes.