Findings

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Evidence found and GRADE certainty

3,971 questions · 9,849 findings · 853 reviews

No studies found 1,150 · 11.7%GRADE not reported 3,387 · 34.4%Very low 1,963 · 19.9%Low 1,809 · 18.4%Moderate 1,207 · 12.3%High 333 · 3.4%

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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 with maxillary permanent first molar extraction

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

1 finding from 1 review

Fixed orthodontic treatment with fixed (multibracket) appliances (exposure) vs None (single-group prevalence/incidence estimate)

Incidence of new ICLs (proportion of subjects developing new lesions) · Patients undergoing fixed orthodontic treatment with fixed (multibracket) appliances, followed for development of new ICLs

About 48% of patients developed new ICLs during fixed orthodontic treatment (pooled incidence 0.48, 95% CI 0.33-0.63; very low certainty; very high heterogeneity).

1 finding from 1 review

Fixed orthodontic treatment with fixed (multibracket) appliances (exposure) vs None (single-group prevalence/incidence estimate)

Prevalence of ICLs (proportion of tooth surfaces affected) · Patients (permanent dentition) during or after fixed orthodontic treatment with fixed (multibracket) appliances

About 22% of tooth surfaces showed ICLs during/after fixed orthodontic treatment (pooled 0.22, 95% CI 0.14-0.33; very low certainty; extreme heterogeneity).

1 finding from 1 review

Fixed orthodontic treatment with fixed (multibracket) appliances (exposure) vs None (single-group prevalence/incidence estimate)

Prevalence of ICLs (proportion of subjects affected) · Patients (permanent dentition) during or after fixed orthodontic treatment with fixed (multibracket) appliances

Around 57% of patients had ICLs during or after fixed orthodontic treatment (pooled prevalence 0.57, 95% CI 0.48-0.65; very low certainty; very high heterogeneity).

1 finding from 1 review

Non-syndromic cleft lip and palate (CLP) status and its oral microbiota (exposure/grouping) vs Children and adolescents aged 0-18 years without CLP (controls)

Periodontal conditions (gingival inflammation, bleeding on probing, probing depth, clinical attachment loss) · Children and adolescents aged 0-18 years with non-syndromic cleft lip and palate (CLP)

Narrative synthesis of 6 studies suggests children/adolescents with CLP have poorer periodontal status (higher gingival and plaque indices, deeper probing, more bleeding and attachment loss) and harbor periodontopathogens; no pooled estimate and the evidence is ungraded.

1 finding from 1 review

Teledentistry diagnosis using DSLR or smartphone extra-oral photographs vs Visual or clinical examination

d/D dft/DFT or dmft/DMFT score differences · Children and adults with primary or permanent dentition

Eight studies calculated caries-score differences; six reported no significant difference, one underestimation, and one overestimation with teledentistry.

1 finding from 1 review

Oral cancer patients (cases) vs Healthy controls

Periodontitis (clinical attachment loss) · Adults in case-control studies (oral cancer patients vs healthy controls)

Clinical attachment loss was significantly greater in oral cancer patients than controls (SMD 1.94, 95% CI 0.22-3.66), though heterogeneity was very high (I2=96.7%); ungraded.

1 finding from 1 review

High-frequency sugar consumption (three or more times daily) vs Low sugar intake (fewer than three times daily)

Dental caries prevalence · Nigerian individuals, including children and adults, with primary or permanent dentition

High-frequency sugar consumption was associated with 18% higher but non-significant odds of dental caries in Nigeria (OR 1.18, 95% CI 0.87 to 1.59; I2=36%; ungraded).

1 finding from 1 review

Low-power CO2 laser irradiation (LLLT, 0.5 to 2 W) vs Placebo (placebo laser or placebo agent) or no treatment

White spot lesion incidence · High caries-risk patients: fixed-orthodontic-appliance patients and children with partially erupted permanent molars

Low-power CO2 laser (LLLT) is associated with a lower incidence of new white spot lesions than placebo (OR 0.21, CI 0.15 to 0.30; ungraded, 3 RCTs, considerable heterogeneity I2=71%).

1 finding from 1 review

Teledentistry diagnosis using DSLR or smartphone extra-oral photographs vs Visual or clinical examination

Specificity for dental caries diagnosis · Children and adults with primary or permanent dentition

Specificity ranged from 83% to 100% across 13 studies; no meta-analysis or GRADE rating was reported.

1 finding from 1 review

TT+CC (homozygous) genotypes vs CT (heterozygous) genotype

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

Over-dominant model (CC+TT vs CT) at FokI(rs10735810) showed no significant association with caries (OR 0.83); ungraded.

1 finding from 1 review

A allele vs G allele

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

FokI(rs2228570) allelic model: A vs G was not significantly associated with dental caries (OR 1.07); ungraded.

1 finding from 1 review

Nd:YAG laser vs No anticaries intervention (untreated enamel)

Enamel acid resistance (cross-sectional microhardness) · Human enamel in pits and fissures (in situ / ex vivo)

Nd:YAG laser increased enamel acid resistance versus untreated enamel in pits and fissures (ungraded, 1 ex-vivo study, no pooled estimate).

1 finding from 1 review

Prenatal vitamin D deficiency (low maternal 25(OH)D during pregnancy) vs Adequate prenatal vitamin D (sufficient maternal 25(OH)D)

Dental caries in children · Children aged 4 to 6 years whose mothers' prenatal vitamin D status was assessed

Among children aged 4-6 years, prenatal vitamin D deficiency is associated with significantly higher odds of dental caries (OR 1.44, 95% CI 1.32-1.56); ungraded.

1 finding from 1 review

Silver diamine fluoride (SDF) vs Atraumatic restorative treatment (ART) with glass ionomer cement (GIC) or glass ionomer material

Caries arrestment at the tooth level · Children and adults with active dental caries (aged 1-50; mostly preschool/school children with primary dentition)

Pooling two trials, SDF and ART/glass ionomer cement showed no clear difference in tooth-level caries arrestment (OR 1.22, wide CI; ungraded subgroup).

1 finding from 1 review

Er:YAG laser irradiation of sound enamel before acid challenge vs No anticaries intervention (untreated enamel)

Calcium ions released in acidic solution · Human tooth enamel specimens, sound/intact (in vitro)

Er:YAG laser irradiation did not significantly change calcium ions released into acidic solution versus untreated control (SMD -0.40, 95% CI -0.96 to 0.15; 6 in vitro studies, I2=80%; ungraded).

1 finding from 1 review