huh. idk about this personally but that seems like an interesting idea? :?
i looked it up quickly and found that flying squirrels
use deer antlers for a calcium supplement, but it also stated on the page NOT to feed any flying squirrel food to sugar gliders because they have completely different nutritional needs.
what kind of food are you feeding your gliders at the moment? the staple diet should already have enough calcium for them to prevent any lack of minerals, which would nix the need for another supplement.
if you just want something for them to chew on, i myself got a kong toy
for ferrets & let them have at it. it's a fun foraging toy, and safe for them to chew on, as even many dogs can't destroy it.