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Each row is one question a systematic review asked: who, what, compared with what, and which outcome, with the effect it found and how certain that is. Every word you type has to appear somewhere in the question, and the closest matches are ranked first.

Limit to evidence status or GRADE (optional)

5,762 questions in 263 reviews · Dental caries

current versions
No studies 321 · 5.6%Ungraded 4,450 · 77.2%Very low 455 · 7.9%Low 297 · 5.2%Moderate 200 · 3.5%High 39 · 0.7%

Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.

QuestionEffectEvidenceStatus / GRADE
Conventional bitewing radiography, D-speed film vs Histological validation of dental tissues (gold standard)
Diagnostic accuracy for proximal caries detection (caries detection level) · Extracted permanent posterior teeth with proximal surfaces (in vitro) · Caries detection level
Systematic review and meta-analysis of diagnostic studies of proximal surface caries. (2021)
Sensitivity 0.19 [0.13, 0.28]2 studiesUngraded
Clear aligners (Invisalign / thermoformed aligners) vs Fixed appliances
Full-mouth bleeding score (FMBS) · Adolescents/teenagers undergoing orthodontic treatment · 12 months, Adolescents
Impact of Aligners and Fixed Appliances on Oral Health during Orthodontic Treatment: A Systematic Review and… (2021)
MD -20.44 [-22.98, -17.90]1 studyUngraded
TaqI (rs731236 T>C) polymorphism in the VDR gene (C allele / variant genotype) vs C allele vs T allele (allele contrast model)
Dental caries susceptibility (risk of dental caries) · Children and adults (no age limit) assessed for dental caries susceptibility · Dentition: Mixed dentition caries
Association Between the TaqI (rs731236 T>C) Gene Polymorphism and Dental Caries Risk: A Meta-analysis. (2021)
OR 1.26 [0.87, 1.82]2 studies · 270 participantsUngraded
Resin infiltration vs Fluoride varnish
Optical/esthetic improvement (DIAGNOdent reading) · Patients (mainly children) with white spot lesions (WSL) · 3 to 6 months, Severe lesions, DIAGNOdent score >14 (Gozetici et al. 2019)
Efficacy of resin infiltration to mask post-orthodontic or non-post-orthodontic white spot lesions or… (2021)
MD 13.15 [3.98, 22.32]1 study · 40 participantsUngraded
Sealant or coating agent (with or without fluoride release) applied to teeth with fixed appliances vs No sealant (untreated control teeth)
Initiation of white spot lesions (WSL), visual-tactile assessment · Patients of any age (11-40 years) receiving comprehensive/fixed orthodontic treatment with fixed appliances · 3-27 months follow-up
Efficacy of sealants and bonding materials during fixed orthodontic treatment to prevent enamel… (2021)
RR 0.70 [0.53, 0.93]6 studies · 2314 participantsVery low
Ulcerative colitis (UC) vs Healthy controls without IBD
Periodontal disease (periodontitis) coincidence · Patients with ulcerative colitis (UC) and controls without IBD; adults, both sexes · Ulcerative colitis (UC) vs healthy controls
Oral Health Status in Patients with Inflammatory Bowel Diseases: A Systematic Review. (2021)
OR 3.25 [2.23, 4.74]5 studiesUngraded
Early childhood caries (ECC) vs ECC-free children (caries-free controls)
Iron deficiency anemia (IDA) · Preschool children (<6 years) · Overall
Iron deficiency and early childhood caries: a systematic review and meta-analysis. (2021)
OR 2.74 [2.41, 3.11]5 studies · 8764 participantsUngraded
Higher number of lost teeth (per one additional lost tooth) vs Fewer lost teeth (continuous, per-tooth increment)
All-cause mortality (ACM) · Adults (any age) with a known number of remaining teeth, followed prospectively in cohort studies · Adjusted for age/sex
Lower Number of Teeth Is Related to Higher Risks for ACVD and Death-Systematic Review and Meta-Analyses of… (2021)
HR 1.02 [1.01, 1.04]5 studies · 4421245 participantsUngraded
Conventional bitewing radiography (E-speed film) vs Cavity preparation or biopsy (operative validation)
Diagnostic accuracy for occlusal caries detection at the dentin caries detection level (D0-2 versus D3-4) · Human permanent posterior teeth (premolars and molars) in patients, occlusal (pit-and-fissure) surfaces
Systematic review and meta-analysis of diagnostic methods for occlusal surface caries. (2021)
AUC 0.902 studiesUngraded
Digital bitewing radiography, phosphor plate (PSP) vs Histological validation of dental tissues (gold standard)
Diagnostic accuracy for proximal caries detection (dentin detection level) · Extracted permanent posterior teeth with proximal surfaces (in vitro) · Dentin detection level
Systematic review and meta-analysis of diagnostic studies of proximal surface caries. (2021)
DOR 26.06 [7.29, 93.21]2 studiesUngraded
Visual or visual-tactile classification systems (any system: ICDAS, ERK, Nyvad, Downer, Lussi, UniViSS, or unspecified) vs Reference standard (histology, excavation, radiographs/microCT, or tooth separation)
Specificity for detection of enamel caries · Asymptomatic children or adults presenting for clinical examination (in vivo studies), or extracted teeth of children… · Up to 3 months between index test and reference standard (in vivo studies), Approximal surface
Visual or visual‐tactile examination to detect and inform the diagnosis of enamel caries (2021) · Cochrane
Specificity 0.83 [0.74, 0.89]NRUngraded
Higher number of lost teeth (per one additional lost tooth) vs Fewer lost teeth (continuous, per-tooth increment)
Atherosclerotic cardiovascular disease (ACVD)-related events (morbidity and mortality) · Adults (any age) with a known number of remaining teeth, followed prospectively in cohort studies · Adjusted for age/sex
Lower Number of Teeth Is Related to Higher Risks for ACVD and Death-Systematic Review and Meta-Analyses of… (2021)
HR 1.01 [1.00, 1.03]7 studies · 4546574 participantsUngraded
Visual or visual-tactile classification systems (any system: ICDAS, ERK, Nyvad, Downer, Lussi, UniViSS, or unspecified) vs Reference standard (histology, excavation, radiographs/microCT, or tooth separation)
Diagnostic accuracy on surfaces with pit and fissure sealants · Asymptomatic children or adults presenting for clinical examination (in vivo studies), or extracted teeth of children… · Up to 3 months between index test and reference standard (in vivo studies), Pit and fissure sealants
Visual or visual‐tactile examination to detect and inform the diagnosis of enamel caries (2021) · Cochrane
Pre-specified heterogeneity investigation of surfaces with previously applied pit and fissure sealants: no studies reported the inclusion of sealants.0 studiesNo studies
Digital bitewing radiography, sensor-based (CCD/CMOS) vs Direct visual examination after tooth separation or bioptical cavity preparation
Diagnostic accuracy for proximal caries detection (dentin detection level) · Patients with permanent posterior teeth, proximal surfaces assessed clinically (in vivo) · Dentin detection level
Systematic review and meta-analysis of diagnostic studies of proximal surface caries. (2021)
DOR 24.4 [0.44, 1359.98]1 studyUngraded
Observed population vs Not applicable
Mean dmft · Five-year-old preschool children in Sharjah · Males
Oral Health of Children and Adolescents in the United Arab Emirates: A Systematic Review of the Past Decade. (2021)
MEAN 6.411 study · 403 participantsUngraded
Soft drink consumption vs Reference consumption not stated
Mean DMFT · School children aged 11-17 years in Sharjah · Overall
Oral Health of Children and Adolescents in the United Arab Emirates: A Systematic Review of the Past Decade. (2021)
Regression coefficient 0.31 [0.14, 0.47]1 study · 803 participantsUngraded
Micro-invasive treatment (resin infiltration or sealing) vs Non-invasive / control treatment
Radiographic proximal caries lesion progression · Patients with non-cavitated proximal (approximal) caries lesions (primary or permanent dentition) · Longest available follow-up, Caries risk: high
Infiltration and sealing for managing non-cavitated proximal lesions: a systematic review and meta-analysis. (2021)
OR 0.14 [0.07, 0.28]3 studiesUngraded
Dental caries (ascertained mostly by WHO criteria/DMFT; also CAST, ICDAS, or clinical examination) vs None (descriptive prevalence meta-analysis)
Dental caries prevalence · General Pakistani population (all ages and both sexes; predominantly children and adolescents) · Province: Punjab
Prevalence of dental caries in Pakistan: a systematic review and meta-analysis. (2021)
Prevalence 55.445 [44.174, 66.44]13 studiesUngraded
Incarcerated mother vs Comparison children
Dental caries prevalence · Preschool children of incarcerated mothers in UAE prison nurseries · Overall
Oral Health of Children and Adolescents in the United Arab Emirates: A Systematic Review of the Past Decade. (2021)
Prevalence 89.81 studyUngraded
Cerebral palsy (oral health status) vs Age- and gender-matched healthy children
Oral health status (caries, gingivitis, calculus, treatment indices) · Children with cerebral palsy in the United Arab Emirates (Dubai)
Oral Health of Children and Adolescents in the United Arab Emirates: A Systematic Review of the Past Decade. (2021)
Al Hashmi et al. (Dubai) reported caries in 53% of children with cerebral palsy (mean DMFT 2.83) and gingivitis in 58.8%, similar to matched controls, but a significantly higher calculus index (0.56 vs 0.07) and more…1 studyUngraded
Digital bitewing radiography, sensor-based (CCD/CMOS) vs Direct visual examination after tooth separation or bioptical cavity preparation
Diagnostic accuracy for proximal caries detection (caries detection level) · Patients with permanent posterior teeth, proximal surfaces assessed clinically (in vivo) · Caries detection level
Systematic review and meta-analysis of diagnostic studies of proximal surface caries. (2021)
AUC 0.821 studyUngraded
Systemic sclerosis (SSc / scleroderma) vs SSc-free individuals (controls)
Maximum interincisor distance (mouth opening) · Adults (general and hospital populations assessed in case-control studies)
Oral manifestations of patients with systemic sclerosis: a meta-analysis for case-controlled studies. (2021)
SMD -1.061 [-1.546, -0.576]4 studiesUngraded
Cerebral palsy vs Healthy age- and sex-matched controls
Mean DMFT · Children with cerebral palsy in Dubai · Overall
Oral Health of Children and Adolescents in the United Arab Emirates: A Systematic Review of the Past Decade. (2021)
MEAN 2.831 studyUngraded
Resin infiltration vs Untreated control (natural remineralization)
Optical/esthetic improvement (visual-tactile assessment) · Patients with post-orthodontic white spot lesions (WSL) · 4 weeks to 6 months, Spectroscopy delta-E (Knosel et al. 2013)
Efficacy of resin infiltration to mask post-orthodontic or non-post-orthodontic white spot lesions or… (2021)
SMD 0.63 [0.26, 1.01]1 study · 115 participantsUngraded
COE with vital rinsing (toluidine blue/tolonium chloride) vs Reference standard: examination and clinical evaluation by a physician/clinician with specialist knowledge or training (long-term follow-up accepted for those screened negative)
Outcome NR · Apparently healthy adults not reporting symptoms of OPMD or OSCC, attending an organised screening or surveillance…
Clinical assessment for the detection of oral cavity cancer and potentially malignant disorders in… (2021) · Cochrane
No eligible study evaluated COE with vital rinse as a stand-alone screen against the reference standard in this version.0 studiesNo studies
Observed population vs Not applicable
Restorative index · Preschool children attending Al Ain pediatric dentistry department · Overall
Oral Health of Children and Adolescents in the United Arab Emirates: A Systematic Review of the Past Decade. (2021)
Proportion 6.41 study · 176 participantsUngraded
Surgery +/- radiotherapy + (adjuvant) chemotherapy vs Surgery +/- radiotherapy alone (observation or adjuvant radiotherapy only)
Disease-free survival, adjuvant concurrent chemoradiation vs adjuvant radiotherapy (pooled) · People receiving curative-intent treatment for oral cavity and oropharyngeal (squamous cell) cancer
Interventions for the treatment of oral cavity and oropharyngeal cancer: chemotherapy (2021) · Cochrane
HR 0.84 [0.72, 0.97]4 studiesUngraded
Highest plaque category vs Lowest plaque category
DMFT (association with plaque) · Children aged 5-6 years in Ajman schools · Highest versus lowest plaque category
Oral Health of Children and Adolescents in the United Arab Emirates: A Systematic Review of the Past Decade. (2021)
ARR 4.77 [3.67, 6.19]1 study · 1036 participantsUngraded
Early childhood caries (ECC) vs ECC-free children (caries-free controls)
Serum ferritin level · Preschool children (<6 years) · Overall
Iron deficiency and early childhood caries: a systematic review and meta-analysis. (2021)
WMD -5.80 [-11.97, 0.37]5 studies · 832 participantsUngraded
Conventional bitewing radiography (D-speed film) vs Cavity preparation or biopsy (operative validation)
Diagnostic accuracy for occlusal caries detection at the dentin caries detection level (D0-2 versus D3-4) · Human permanent posterior teeth (premolars and molars) in patients, occlusal (pit-and-fissure) surfaces
Systematic review and meta-analysis of diagnostic methods for occlusal surface caries. (2021)
DOR 11.79 [2.43, 57.24]2 studiesUngraded
Visual or visual-tactile classification systems (any system: ICDAS, ERK, Nyvad, Downer, Lussi, UniViSS, or unspecified) vs Reference standard (histology, excavation, radiographs/microCT, or tooth separation)
Sensitivity for detection of enamel caries · Asymptomatic children or adults presenting for clinical examination (in vivo studies), or extracted teeth of children… · Up to 3 months between index test and reference standard (in vivo studies), Non-histology reference standard (excavation, radiographs, separation)
Visual or visual‐tactile examination to detect and inform the diagnosis of enamel caries (2021) · Cochrane
Sensitivity 0.78 [0.48, 0.93]NRUngraded
Observed population vs Not applicable
Enamel dissolution prevalence · Five-year-old preschool children in Sharjah · Overall
Oral Health of Children and Adolescents in the United Arab Emirates: A Systematic Review of the Past Decade. (2021)
Prevalence 55.01 study · 403 participantsUngraded
Laser fluorescence (DIAGNOdent 2190/pen) vs Direct visual examination after tooth separation or bioptical cavity preparation
Diagnostic accuracy for proximal caries detection (dentin detection level) · Patients with permanent posterior teeth, proximal surfaces assessed clinically (in vivo) · Dentin detection level
Systematic review and meta-analysis of diagnostic studies of proximal surface caries. (2021)
DOR 2.18 [0.24, 19.95]3 studiesUngraded
Fluorescence-based devices vs Dental imaging (analog or digital radiographs)
Difference in specificity · Children or adults asymptomatic or suspected of enamel caries; extracted teeth · Analysis 1: fully within-person comparison
Enamel Caries Detection and Diagnosis: An Analysis of Systematic Reviews. (2021)
Difference in specificity -0.03 [-0.14, 0.06]19 studies · 2849 participantsUngraded
Digital bitewing radiography, sensor-based (CCD/CMOS) vs Histological validation of dental tissues (gold standard)
Diagnostic accuracy for proximal caries detection (dentin detection level) · Extracted permanent posterior teeth with proximal surfaces (in vitro) · Dentin detection level
Systematic review and meta-analysis of diagnostic studies of proximal surface caries. (2021)
AUC 0.904 studiesUngraded
Electrical conductance devices (electronic caries monitor (ECM) and/or CarieScan Pro), used as an adjunct to clinical oral examination vs Reference standard: histology or enhanced visual examination (with or without radiographs)
Outcome NR · Children/adolescents/adults or extracted teeth; target condition = non-cavitated enamel caries on PROXIMAL… · Up to 3 months between index test and reference standard (in vivo studies)
Electrical conductance for the detection of dental caries (2021) · Cochrane
No eligible studies. All included studies assessed occlusal surfaces only ('All studies assessed the use of the electrical conductance devices on occlusal surfaces.'); proximal surfaces were a planned surface subgroup…0 studiesNo studies
Observed population vs Not applicable
Exposed dentin prevalence · Five-year-old preschool children in Sharjah · Overall
Oral Health of Children and Adolescents in the United Arab Emirates: A Systematic Review of the Past Decade. (2021)
Prevalence 3.71 study · 403 participantsUngraded
Radiographic imaging methods (any: analogue radiographs, digital radiographs, or CBCT) vs Reference standard (histology, excavation, or enhanced visual examination)
Sensitivity for detection and diagnosis of early (enamel) caries · Asymptomatic children, adolescents, or adults presenting for clinical examination (in vivo studies), or extracted… · Up to 3 months between index test and reference standard (in vivo studies), Setting: in vitro (non-CBCT)
Imaging modalities to inform the detection and diagnosis of early caries (2021) · Cochrane
Sensitivity 0.44 [0.37, 0.50]NRUngraded
Coating material (bonding material or sealant) WITH fluoride release vs Coating material WITHOUT fluoride release
White spot lesions assessed by laser fluorescence (DIAGNOdent) · Patients of any age (11-40 years) receiving comprehensive/fixed orthodontic treatment with fixed appliances
Efficacy of sealants and bonding materials during fixed orthodontic treatment to prevent enamel… (2021)
Laser fluorescence (DIAGNOdent) was assessed in 3 studies comparing coating with vs without fluoride release, but meta-analysis could not be performed (results reported using incompatible continuous/categorical formats…3 studiesUngraded
Frequent carbohydrate / sugary food intake vs Infrequent carbohydrate intake
Dental caries (presence) · Individuals in East Africa assessed for dental caries
Prevalence of Dental Caries and Associated Factors in East Africa, 2000-2020: Systematic Review and… (2021)
OR 1.575 [1.13, 3.051]11 studies · 5651 participantsUngraded
Maternal smoking during pregnancy vs No maternal smoking during pregnancy
Dental caries · Children
Correlation Between Maternal Smoking During Pregnancy and Dental Caries in Children: A Systematic Review and… (2021)
OR 1.57 [1.47, 1.67]6 studiesUngraded
Systemic sclerosis (SSc / scleroderma) vs SSc-free individuals (controls)
Number of teeth · Adults (general and hospital populations assessed in case-control studies)
Oral manifestations of patients with systemic sclerosis: a meta-analysis for case-controlled studies. (2021)
SMD -0.947 [-2.131, 0.237]3 studiesUngraded
Conventional bitewing radiography (E-speed film) vs Histological validation (serial sectioning, grinding, hemisection, or microradiography)
Diagnostic accuracy for occlusal caries detection at the dentin caries detection level (D0-2 versus D3-4) · Extracted human permanent posterior teeth (premolars and molars), occlusal (pit-and-fissure) surfaces
Systematic review and meta-analysis of diagnostic methods for occlusal surface caries. (2021)
Specificity 0.95 [0.53, 0.997]2 studiesUngraded
Emirati nationality vs Non-Emirati nationality
Mean dmft, overall · Preschool children in Abu Dhabi nurseries · Overall
Oral Health of Children and Adolescents in the United Arab Emirates: A Systematic Review of the Past Decade. (2021)
MEAN 1.681 study · 186 participantsUngraded
Optical coherence tomography (OCT) vs Reference standard: histology, or enhanced visual examination with or without radiographs (also operative excavation, tooth separation, or microcomputed tomography)
Specificity for detection of enamel/early caries · Children or adults presenting asymptomatically or suspected of having enamel caries (clinical/in vivo studies);… · Up to 3 months between index test and reference standard (in vivo; in vitro no limit if stored appropriately)
Transillumination and optical coherence tomography for the detection and diagnosis of enamel caries (2021) · Cochrane
Specificity 0.83 [0.68, 0.91]10 studiesUngraded
Radiographic imaging methods (any: analogue radiographs, digital radiographs, or CBCT) vs Reference standard (histology, excavation, or enhanced visual examination)
Specificity for detection and diagnosis of early (enamel) caries · Asymptomatic children, adolescents, or adults presenting for clinical examination (in vivo studies), or extracted… · Up to 3 months between index test and reference standard (in vivo studies), Sensitivity analysis: low dentine-caries prevalence <15%
Imaging modalities to inform the detection and diagnosis of early caries (2021) · Cochrane
Specificity 0.91 [0.87, 0.94]NRUngraded
TaqI (rs731236 T>C) polymorphism in the VDR gene (C allele / variant genotype) vs CC genotype vs CT/TT genotype (recessive model)
Dental caries susceptibility (risk of dental caries) · Children and adults (no age limit) assessed for dental caries susceptibility · Dentition: Permanent tooth caries
Association Between the TaqI (rs731236 T>C) Gene Polymorphism and Dental Caries Risk: A Meta-analysis. (2021)
OR 1.44 [1.03, 2.00]3 studies · 1271 participantsUngraded
Visual examination (VE) vs Cavity preparation or biopsy (operative validation)
Diagnostic accuracy for occlusal caries detection at the 1/3 dentin caries detection level (Ekstrand; D0-2 versus D3-4) · Human permanent posterior teeth (premolars and molars) in patients, occlusal (pit-and-fissure) surfaces
Systematic review and meta-analysis of diagnostic methods for occlusal surface caries. (2021)
AUC 0.773 studiesUngraded
Emirati nationality vs Non-Emirati nationality
Dental caries prevalence · Preschool children in Abu Dhabi nurseries · Overall
Oral Health of Children and Adolescents in the United Arab Emirates: A Systematic Review of the Past Decade. (2021)
Prevalence 411 study · 186 participantsUngraded
Surgery +/- radiotherapy + (adjuvant) chemotherapy vs Surgery +/- radiotherapy alone (observation or adjuvant radiotherapy only)
Overall survival, adjuvant concurrent chemoradiation vs adjuvant radiotherapy · People receiving curative-intent treatment for oral cavity and oropharyngeal (squamous cell) cancer
Interventions for the treatment of oral cavity and oropharyngeal cancer: chemotherapy (2021) · Cochrane
HR 0.84 [0.72, 0.98]4 studies · 1097 participantsModerate