Electronic Nicotine Delivery Systems (ENDS)

Board takeaway

• Ask adolescents and caregivers about vaping, document use and exposure, and counsel prevention and cessation.
• Exposure: Vaping produces an aerosol that can contain nicotine and toxic chemicals, even when it contains fewer toxicants than cigarette smoke.
• Uncertainty about a specific dental effect does not make vaping safe.

What ENDS deliver

• Battery-powered disposable, cartridge, tank/mod, and pod devices heat liquid into an aerosol that can expose bystanders.
• Liquids contain variable propylene glycol, glycerol, nicotine, flavors, and additives; some contain marijuana/THC/CBD oils. Incomplete disclosure complicates assessment; toxins may include formaldehyde and acetaldehyde.

Youth initiation and dependence

• Nicotine can harm the developing brain and cause dependence. Parental smoking/dependence are strong factors associated with smoking initiation.
• Concealable designs, sweet flavors, and advertising attract youth, including never-smokers.
• Youth vaping is associated with subsequent cigarette use; avoid asserting individual causation. Source prevalence/advertising surveys are historical.

Systemic and exposure safety

• Propylene glycol can irritate eyes/airways; the source also describes childhood asthma concern with prolonged exposure.
• Concentrated refill liquids pose poisoning risk. Older cited lethal-dose estimates are not safe limits or triage thresholds; no poisoning algorithm is provided.
• EVALI outbreak: vitamin E acetate was associated with lung injury; THC appeared in most FDA-tested samples described. The source retains uncertainty about multiple contributors.
• Secondhand aerosol contains potentially toxic/carcinogenic compounds. Similar cotinine responses in one exposure study do not establish equal overall toxicity to cigarette smoke.

Oral findings and evidence strength

• Cross-sectional/self-reported associations: gingival pain/bleeding, tongue/cheek pain, fractured teeth, dental problems, and unpleasant taste.
• Adult associations: worse periodontal measures, gingival inflammation/disease, and dry mouth; pediatric extrapolation is uncertain.
• Reported lesions: nicotinic stomatitis, hairy tongue, angular cheilitis.
• Explosions can cause burns, ulcers, fractures, avulsion, palatal perforation, and soft-tissue injury.
• Caries association is largely anecdotal. Proposed mechanisms: sugars/flavorings, S. mutans adhesion, and biofilm formation.
• Literature review supports the policy; insufficient/inconclusive evidence also requires expert/consensus opinion.

Clinical counseling and policy actions

• Counsel cessation. The 2024 source describes mixed cessation evidence. No e-cigarette is FDA-approved as a cessation aid; marketing authorization is separate.
• Support ENDS restrictions wherever children live, learn, play, work, or visit.
• Advocate restrictions on advertising/promotion/sales to those under 21, child-friendly flavor bans, and limits on cessation use.
• Oppose unregulated nicotine water/lollipops, tobacco lozenges, and heated tobacco substitutes; distinguish regulated nicotine replacement therapy.
• Support research on emissions, secondhand exposure, prevention, and addiction.
• Historical regulation: under-18 sales ban, free-sample restrictions, addiction warnings. Current federal sales age is 21, including ENDS (FDA Tobacco 21).

Common board traps

Answer aloud

How should you counsel a teenager who believes vaping is safe?

Vaping produces an aerosol rather than harmless water vapor.

• It can contain nicotine, irritants, and potentially toxic chemicals; nicotine can cause dependence and harm the developing brain.
• Reported oral problems include irritation, dry mouth, periodontal changes, and injury from device explosions, although pediatric evidence varies.
• Document the teen's and caregivers' use, explain exposure risks, counsel cessation, and support a vape-free environment.

Does vaping cause caries?

The policy does not establish that vaping causes caries.

• Suggested mechanisms include sugars and flavorings, increased S. mutans adhesion, and biofilm formation, but the clinical caries association is largely anecdotal.
• Explain that uncertainty while assessing the patient's actual caries risk and counseling against vaping because of its other established concerns.