Findings

What do systematic reviews say?

Refine by population, intervention, comparison or outcome
More filters
Evidence found and GRADE certainty

2,745 questions · 4,389 findings · 203 reviews · Oral Health

No studies found 39 · 0.9%GRADE not reported 3,844 · 87.6%Very low 198 · 4.5%Low 137 · 3.1%Moderate 134 · 3.1%High 37 · 0.8%

Overweight vs Normal Weight or Non‐Obese

Caries experience (mean DMFT) · Brazilian children/adolescents in permanent dentition (BMI classified by CDC 2000 growth charts)

Overweight may make little or no difference to caries experience (DMFT) in the permanent dentition (very low certainty).

1 finding from 1 review

Oral cancer patients (cases) vs Healthy controls

Mean number of missing teeth in OC cases vs controls · Adults in case-control studies (oral cancer patients vs healthy controls)

The mean number of missing teeth did not differ significantly between oral cancer patients and controls (SMD 0.59, 95% CI -0.04 to 1.22); ungraded.

1 finding from 1 review

Probiotics vs placebo or control

Lactobacillus count (CFU/mL) · Children and/or adolescents (<18 years) without background systemic disease

Probiotics may make little to no difference to Lactobacillus count versus control (MD -0.78 CFU/mL, 95%CI -1.65 to 0.09; very low certainty).

1 finding from 1 review

CO2 laser combined with fluoride vs Fluorides alone (monotherapy)

Enamel demineralization (QLF ΔF) · Human enamel specimens under cariogenic challenge (in situ / ex vivo)

Evidence on a synergistic effect of combining CO2 laser with fluoride versus fluoride alone is mixed: one ex-vivo study found combined treatment superior while another found no synergy (ungraded, 2 ex-vivo studies, no pooled estimate).

1 finding from 1 review

M2 Demirjian stages F-G vs M2 Demirjian stages E-D

Spontaneous space closure · Children and adolescents with maxillary permanent first molar extraction

In the maxilla, M2 Demirjian stages F-G were not associated with a statistically significant difference in space closure odds.

1 finding from 1 review

Remineralizing orthodontic adhesives vs Conventional/control orthodontic adhesive (e.g., Transbond XT) or negative control

Ion release · Human teeth with early enamel lesions surrounding orthodontic brackets

No meta-analysis was conducted; most studies reported increased ion release over time, but few reported peak values.

1 finding from 1 review

Second molar at Demirjian stage E-F at extraction vs Second molar at Demirjian stage G-H at extraction

Spontaneous space closure · Children and adolescents after extraction of a mandibular permanent first molar (before eruption of the second molar)

In the mandible, Demirjian stage E-F vs G-H was not significantly associated with space closure (OR 4.44; not GRADE-rated).

1 finding from 1 review

Overweight/obesity (combined) vs Normal Weight or Non‐Obese

Dental caries prevalence · Brazilian children/adolescents in permanent dentition (BMI classified by WHO 2006 Z-score)

A meta-analysis of 2 studies (permanent dentition, WHO 2006 Z-score) was rated very low certainty; the pooled effect was not shown in the article.

1 finding from 1 review

Second molar at Demirjian stage A-D at extraction vs Second molar at Demirjian stage F-H at extraction

Spontaneous space closure · Children and adolescents after extraction of a mandibular permanent first molar (before eruption of the second molar)

In the mandible, earlier Demirjian stage A-D (vs F-H) increases odds of space closure (OR 3.11; low certainty).

1 finding from 1 review

Slum / urban-disadvantaged setting vs Non-slum urban / general-urban / national population

Pattern of dental service utilisation and barriers · Adult residents of slums and non-slum urban settings of LMICs

Dental service use is low, episodic and pain-driven, with widespread self-care and cost/funding barriers; ungraded.

1 finding from 1 review

Transbond Plus self etching primer (3M Unitek) vs Conventional three-step bonding system (3M Transbond XT)

White spot lesion incidence · Orthodontic patients of any age with fixed braces (new DLs assessed at debond)

The self-etch primer system had higher WSL incidence than the conventional system, with certainty not graded.

1 finding from 1 review

Genome-wide common variants (aggregate additive; LD score regression) vs Not applicable (variance-component estimate)

Periodontal disease - SNP-based heritability · Japanese adults (present-study cohort)

SNP-based heritability of periodontal disease was low (h2=0.0519, SE 0.0182); ungraded.

1 finding from 1 review

Grape seed extract (GSE) and its proanthocyanidin fractions vs Untreated or vehicle control (some studies vs positive antimicrobial controls, e.g. chlorhexidine/fluoride)

Biofilm morphological changes · Streptococcus mutans (in vitro cultures and biofilms)

Grape seed extract alters S. mutans biofilm morphology (2 studies; ungraded).

1 finding from 1 review

GG genotype vs GA+AA genotypes

Dental caries · Children (<18 years) with vs without dental caries

After removing Zhang 2006, the recessive model at BsmI(rs1544410) remained non-significant (OR 0.86); ungraded.

2 findings from 1 review

Slum / urban-disadvantaged setting vs Non-slum urban / general-urban / national population

Frequency of mouth cleaning · Adult residents of slums and non-slum urban settings of LMICs

Twice-daily cleaning (recommended) is uncommon; most clean once, in the morning; ungraded.

1 finding from 1 review

Opal Seal fluoride-releasing adhesive vs Conventional/control orthodontic adhesive (e.g., Transbond XT) or negative control

White spot lesion rate and volume · Orthodontic patients of any age with fixed braces (new DLs assessed at debond)

Opal Seal showed no significant difference in WSL rate or volume, with certainty not graded.

1 finding from 1 review