Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,315 questions · 23,557 findings · 2,311 reviews

No studies found 4,183 · 17.8%GRADE not reported 3,930 · 16.7%Very low 5,371 · 22.8%Low 5,787 · 24.6%Moderate 3,320 · 14.1%High 966 · 4.1%

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Veillonella spp. abundance

Future caries · Children without a previous history of caries

Veillonella spp. predicted future caries among children without a caries history, but no quantitative effect estimate was reported.

1 finding from 1 review

Anticaries vaccine or antibody (DNA, recombinant protein, nanoparticle-adjuvanted, live-vector, plant-based, or passive IgY immunization) targeting S. mutans vs Control (unvaccinated / empty vector / PBS / placebo animals)

Streptococcus mutans colonization reduction (narrative; no CFU data reported) · Animal caries models (mice, rats, hamsters) challenged/colonized with Streptococcus mutans; one transgenic-plant antigen-expression system

Anticaries vaccines produced a sustained reduction in Streptococcus mutans colonization on teeth in animal models (ungraded narrative synthesis; no pooled estimate).

1 finding from 1 review

Dental caries (ECC/severe ECC) as exposure/grouping vs Caries-free controls

Relative abundance of S. mutans in saliva · Individuals assessed for dental caries, predominantly children with early childhood caries (ECC) or severe ECC (age about 1 to 4 years)

A few small studies report Streptococcus mutans relative abundance in caries versus caries-free children without pooling; the evidence is ungraded and not meta-analyzed.

1 finding from 1 review

Composite resin vs Amalgam restoration

Restoration failure · Permanent posterior teeth (molars/premolars) receiving direct restoration

There was no statistically significant difference in failure risk between composite resin and amalgam restorations in permanent posterior teeth (pooled RR 0.96, 95% CI 0.68 to 1.34; 13 studies; not GRADE-rated, with very high heterogeneity, I2 = 97%).

1 finding from 1 review

Anticaries vaccine or antibody (DNA, recombinant protein, nanoparticle-adjuvanted, live-vector, plant-based, or passive IgY immunization) targeting S. mutans vs Control (unvaccinated / empty vector / PBS / placebo animals)

Salivary / secretory IgA (SIgA) antibody response (immunogenicity) · Animal caries models (mice, rats, hamsters) challenged/colonized with Streptococcus mutans; one transgenic-plant antigen-expression system

Anticaries vaccines, particularly via mucosal (intranasal) routes, elicited increased salivary/secretory IgA responses in the animal studies (ungraded narrative synthesis; no pooled estimate).

1 finding from 1 review

Electronic cigarette use vs Non-smokers (non-users)

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

Electronic cigarette use vs Non-smokers (non-users)

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

Electronic cigarette use vs Non-smokers (non-users)

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

Anticaries vaccine or antibody (DNA, recombinant protein, nanoparticle-adjuvanted, live-vector, plant-based, or passive IgY immunization) targeting S. mutans vs Control (unvaccinated / empty vector / PBS / placebo animals)

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

All European countries pooled (overall) vs None (overall pooled prevalence)

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