if you smoke enough marijuana to get a dry mouth (and don't brush your teeth because you are stoned) then i guess it can have an indirect effect on cavity formation. certainly people who use meth (crystal) tend to get the worst teeth every. as the doctor said if you get dry mouth or "cotton mouth" it is important to try and keep your mouth as lubricated as possible as a dry mouth is a breeding ground for bacteria and can lead to a number of dental problems. but its not something i would be overly concerned about.
does marijuana induce cavities? . i've heard that dry mouth from marijuana can be a factor for cavities. is that true?