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
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
Serum IgG antibody response (immunogenicity) · Animal caries models (mice, rats, hamsters) challenged/colonized with Streptococcus mutans; one transgenic-plant antigen-expression system
Anticaries vaccines elicited increased serum IgG antibody responses across the animal studies (ungraded narrative synthesis; no pooled estimate).
1 finding from 1 review
no estimate extracted
Studies not reported
GRADE not reported
Caries experience (mean DMFT) · 12-year-old children across European countries (national/regional epidemiological surveys, 2011-2022)
Across European countries the overall pooled mean DMFT in 12-year-olds was 2.10 (95% CI 1.63 to 2.57), with very high between-country heterogeneity (I2=100%); not GRADE-rated.
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
Early childhood caries (ECC) - incidence/risk · Preschool children aged <=71 months (caries outcome assessed at 3-6 years)
Children exposed to secondary smoking from infancy have a higher incidence of early childhood caries by age 3 (RR 1.45; low certainty).
1 finding from 1 review
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
Development of >=1 new carious lesion (caries incidence) · Animal caries models (mice, rats, hamsters) challenged/colonized with Streptococcus mutans; one transgenic-plant antigen-expression system
In preclinical animal models, anticaries vaccines significantly reduced dental caries risk (pooled RR 0.53, 95% CI 0.46 to 0.62; random-effects), but the evidence is ungraded and limited to short-term animal studies.
1 finding from 1 review
RR 0.53 [0.46, 0.62]
Studies not reported
GRADE not reported
Relative abundance of Veillonella spp. · Individuals assessed for dental caries, predominantly children with early childhood caries (ECC) or severe ECC (age about 1 to 4 years)
Evidence on whether Veillonella spp. relative abundance is higher or lower in children with dental caries than caries-free controls is inconsistent across 7 small observational studies; no pooled estimate was produced and the evidence is ungraded.
1 finding from 1 review
Dental caries (self-reported history) · Japanese adults (present-study direct-to-consumer genetic testing cohort); self-reported disease cases vs controls
Gene-based analysis found ADGRL2 significantly associated with dental caries (FDR q<0.05); ungraded.
1 finding from 1 review
Early childhood caries (ECC) · Preschool children (<6 years)
After excluding one study, nocturnal breastfeeding was associated with higher ECC risk (RR 3.05, 95% CI 2.40 to 3.87; I²=33%).
2 findings from 1 review
Number of ibuprofen tablets required · Adults with a symptomatic necrotic tooth or localised acute apical abscess (no signs of spreading infection or systemic involvement)
Postoperative systemic antibiotics… showed no clear difference in number of ibuprofen tablets required compared with matched placebo, partial or total chemo-mechanical debridement and…; GRADE not reported.
1 finding from 1 review
Incidence of new ICLs (mean number of new lesions per subject) · Patients undergoing fixed orthodontic treatment with fixed (multibracket) appliances, followed for development of new ICLs
Patients developed on average about 2.29 new ICLs during fixed orthodontic treatment (95% CI 1.12-3.46; very low certainty; very high heterogeneity).
1 finding from 1 review
Percussion pain at 24 hours · Adults with a symptomatic necrotic tooth or localised acute apical abscess (no signs of spreading infection or systemic involvement)
Postoperative systemic antibiotics… showed no clear difference in percussion pain at 24 hours compared with matched placebo, partial or total chemo-mechanical debridement and…; GRADE not reported.
2 findings from 1 review
Pain at 24 hours · Adults with a symptomatic necrotic tooth or localised acute apical abscess (no signs of spreading infection or systemic involvement)
It is very uncertain whether postoperative systemic antibiotics… changes pain at 24 hours compared with matched placebo, partial or total chemo-mechanical debridement and… (very low certainty).
1 finding from 1 review
Spontaneous space closure · Children and adolescents after extraction of a mandibular permanent first molar (before eruption of the second molar)
In the maxilla, spontaneous space closure occurred in about 85% of cases (9 studies; prevalence not GRADE-rated).
3 findings from 1 review
Swelling (mean) · Adults with a symptomatic necrotic tooth or localised acute apical abscess (no signs of spreading infection or systemic involvement)
Postoperative systemic antibiotics… showed no clear difference in swelling at 48 hours compared with matched placebo, partial or total chemo-mechanical debridement and…; GRADE not reported.
4 findings from 1 review
SMD 0.04 [-0.47, 0.55]
2 studies · 61 participants
GRADE not reported
SMD 0.27 [-0.23, 0.78]
2 studies · 62 participants
Very low
SMD 0.02 [-0.49, 0.52]
2 studies · 61 participants
Very low
Show 1 more finding
Early childhood caries (ECC) · Preschool children (<6 years)
After excluding Peres et al. (2017), breastfeeding for less than 24 months was associated with fewer caries (RR 0.49, 95% CI 0.39 to 0.62; I²=6%).
2 findings from 1 review
Incidence of new ICLs (proportion of tooth surfaces developing new lesions) · Patients undergoing fixed orthodontic treatment with fixed (multibracket) appliances, followed for development of new ICLs
About 15% of tooth surfaces developed new ICLs during fixed orthodontic treatment (pooled 0.15, 95% CI 0.08-0.26; very low certainty; extreme heterogeneity).
1 finding from 1 review