Aren’t those teeth a symptom of too much Blue Meth?
I’m not sure if he does meth or not, although I can’t see why he would not.
Cocaine use will also have a similar effect, especially considering that users will often smear the powder on their teeth and gums to numb them, where the cocaine will have a similar effect as it does on the septum where it dissolves it.
Also smoking cocaine will cause degenerative effects on the tissues that the smoke contacts.