Oral candidiasis prevalence · Adult e-cigarette (ENDS) users (general oral health; predominantly natural dentition)
E-cigarette users may have a higher prevalence of oral Candida colonization than non-smokers (narrative synthesis; ungraded).
1 finding from 1 review
Narrative synthesis: e-cigarette users showed a higher prevalence of Candida spp. (e.g., C. albicans) and increased fungal species compared with non-smokers (Ralho, Camoni [32,28]); no pooled estimate reported.
2 studies
GRADE not reported
Dental caries and cariogenic bacteria (Streptococcus mutans, Lactobacilli) · Adult e-cigarette (ENDS) users (general oral health; predominantly natural dentition)
E-cigarette use is associated with more cariogenic bacteria and increased dental caries risk compared with non-smokers (narrative synthesis; ungraded).
1 finding from 1 review
Narrative synthesis: e-cigarette use linked to increased cariogenic bacteria (S. mutans, Lactobacilli) and worsening dental caries, with flavored e-liquids noted as a caries risk factor (Zieba, Camoni, Yang…
3 studies
GRADE not reported
Self-reported gingivitis · Adult e-cigarette (ENDS) users (general oral health; predominantly natural dentition)
E-cigarette use is associated with self-reported gingivitis compared with non-smokers (single included review; ungraded).
1 finding from 1 review
Peri-implant clinical and radiographic parameters (plaque index, probing depth, bone loss, pro-inflammatory profile) · Adult e-cigarette (ENDS) users with dental implants (incl. male implant-supported prosthesis patients)
Among dental implant patients, e-cigarette users show worse peri-implant parameters (more plaque, worse clinical and radiographic outcomes) than non-smokers (narrative synthesis; ungraded).
1 finding from 1 review
Oral microbiota composition (dysbiosis; increased periodontal/opportunistic pathogens) · Adult e-cigarette (ENDS) users (general oral health; predominantly natural dentition)
E-cigarette use is associated with oral microbiota dysbiosis and increased pathogenic bacteria compared with non-smokers (narrative synthesis; ungraded).
1 finding from 1 review
Plaque index / periodontal health (relative harm vs conventional smoking) · Adult e-cigarette (ENDS) users (general oral health)
E-cigarette users tend to have a lower plaque index and less periodontal harm than traditional cigarette smokers, although still worse than non-smokers (narrative synthesis; ungraded).
1 finding from 1 review
Plaque index (PI) / oral hygiene · Adult e-cigarette (ENDS) users (general oral health; predominantly natural dentition)
E-cigarette users tend to have a higher plaque index (more biofilm accumulation) than non-smokers (narrative synthesis of systematic reviews; ungraded).
1 finding from 1 review
Narrative synthesis: e-cigarette users exhibited a higher plaque index than non-smokers across included reviews (Shabil, Vamos, Youssef, Thiem, Figueredo, Yang [24,25,27,29,30,31]); the umbrella review reported no…
6 studies
GRADE not reported
Periodontitis / periodontal disease and periodontal parameters · Adult e-cigarette (ENDS) users (general oral health; predominantly natural dentition)
E-cigarette users appear more likely to develop periodontal disease and worse periodontal parameters than non-smokers (narrative synthesis; ungraded).
1 finding from 1 review
Narrative synthesis: e-cigarette use associated with increased risk of periodontal and gingival disease and worse periodontal parameters vs non-smokers (Tattar, Shabil, Figueredo, Yang [23,24,30,31]); no pooled…
7 studies
GRADE not reported
Enamel/dental hard-tissue changes and e-liquid cariogenic properties (demineralization, colour change, pH, sugar content, metals) · Oral bacteria (streptococci), dental hard tissue (enamel/dentin) and e-liquids studied in vitro/ex vivo (with a few clinical microbiome…
In vitro evidence suggests e-liquids are often acidic and sugar-containing and can alter enamel/dentin colour and properties, supporting a plausible cariogenic effect, but findings are heterogeneous and not pooled (ungraded, narrative).
1 finding from 1 review
Cariogenic and commensal oral bacteria (S. mutans and commensal streptococci growth, adhesion, biofilm) · Oral bacteria (streptococci), dental hard tissue (enamel/dentin) and e-liquids studied in vitro/ex vivo (with a few clinical microbiome…
Most in vitro studies indicate e-cigarette aerosol/e-liquid (especially flavored/high-concentration) disrupts normal oral flora and favors cariogenic S. mutans growth and biofilm, plausibly increasing caries risk; not pooled (ungraded, narrative).
1 finding from 1 review