Dentists are increasingly seeing the side effects of vaping in their patients' mouths including stained teeth, gum disease, bad breath, tooth decay, and in extreme cases wounds from exploding e-cigarettes. 

Dental clinicians said the impacts of e-cigarette use was especially increasing among young people and teenagers as their use soared amid a thriving black market. 

Pitt Street Dental Centre principal surgeon Michael Cai said the impact of vaping on teeth was just as horrible as smoking and said he’d seen two patients after their vapes exploded, leaving chemical burns on their mouths and gums.