Tobacco Use Effects on Oral Health

Tobacco consumption in both smoked and smokeless forms exerts a multifaceted impact on the oral cavity, manifesting in elevated risk of dental caries, periodontal disease, mucosal lesions and impaired wound healing. The introduction of carcinogenic compounds and reactive free radicals disrupts local immune responses and diminishes salivary flow and buffering capacity. Nicotine and other substances promote vascular constriction, reducing tissue perfusion and delaying repair, while chemical irritation fosters leukoplakia, erythroplakia and malignancies of the lip, tongue and oral mucosa. Alterations in the oral microbiome further encourage overgrowth of acidogenic and proteolytic organisms, exacerbating tooth decay and gum inflammation. These effects are observed globally, with variations in prevalence according to product type, regional patterns of use and socioeconomic context. Public health measures focused on cessation, early detection and microbiome restoration are essential to mitigate this preventable burden.

Research from Nature Portfolio

Recent studies have applied quantitative synthesis methods to assess the health impacts of chewing tobacco, revealing a moderate association with lip and oral cavity cancer, pharyngeal malignancies and stroke, though evidence for cardiovascular outcomes such as ischaemic heart disease remains inconclusive. Conservative risk estimates underscore the need for strengthened policy interventions and targeted research to refine exposure–response relationships. In parallel, high-resolution sequencing of the supragingival microbiome in cigarette and alternative tobacco smokers has demonstrated type-specific dysbiosis, with increased abundance of Streptococcus mutans and Lactobacilli in heavy smokers and enrichment of periodontopathogens in users of non-conventional products. These findings implicate shifts in microbial community structure as a key driver of caries susceptibility and suggest avenues for microbiota-based preventive therapies.

Tobacco Use Effects on Oral Health publication trend

The graph below shows the total number of articles in tobacco use effects on oral health across all publications each year (not limited to Nature Index journals).

Technical terms

Dental caries: A progressive demineralisation of tooth enamel and dentine caused by acid production from bacterial metabolism.

Periodontitis: A chronic inflammatory condition characterised by destruction of the supporting structures of teeth, including gingiva, periodontal ligament and alveolar bone.

Supragingival microbiome: The community of microorganisms that colonise the tooth surfaces above the gingival margin.

Smokeless tobacco: Non-combustible tobacco products, such as chewing tobacco or snuff, used orally or nasally.

Oral dysbiosis: An imbalance in the composition or function of the oral microbial community that promotes disease.

References

1. Health effects associated with chewing tobacco: a Burden of Proof study. Nature Communications (2024).
2. Supragingival microbiome alternations as a consequence of smoking different tobacco types and its relation to dental caries. Scientific Reports (2022).
3. Correlation between tobacco smoking and dental caries: A systematic review and meta-analysis. Tobacco Induced Diseases (2019).
4. The effect of smoking on caries-related microorganisms. Tobacco Induced Diseases (2019).
5. Tobacco use and caries increment in young adults: a prospective observational study. BMC Research Notes (2019).