Glucotoxicity as far as I’m aware has long been known to cause oral hygiene problems. This strikes me on first thought as another medicinal solution to a dietary problem (in the case of insulin resistant diabetes). In fact, carbohydrates in general, although they may not all taste sweet (owing to the lack of fructose) begin breaking down into glucose before we’ve even swallowed them, contributing measurably to tooth decay, but that’s a wider discussion.
Personally I think it’s better to address the root cause of the diabetes rather than once again papering over the cracks.