Why does crack cocaine make your teeth fall out?

1) Cocaine contains a lot of powerful, acidic chemicals. Since crack cocaine is smoked, the harmful chemical compounds of the drug come in direct contact with the teeth and gums. Prolonged use can result in damage to the enamel, bone and nerve endings which weakens or kills the tooth resulting in broken or dead teeth. There is no way to prevent this except by abstaining from use.

2) The burning crack pipe doesn't help either

3) It doesn't. Bad oral hygeine caused by people not taking care of themselves while they are addicts is what causes the teeth to fall out. If cocaine is rubbed on the gums, it may contribute to the problem, but it is not usually used that way.