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Evidence found and GRADE certainty

3,556 questions · 10,375 findings · 429 reviews · Oral Health

No studies found 1,344 · 13%GRADE not reported 6,832 · 65.9%Very low 1,228 · 11.8%Low 613 · 5.9%Moderate 290 · 2.8%High 68 · 0.7%

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Supraomohyoid neck dissection vs Modified radical neck dissection

Adverse events associated with treatment · Adults with oral cavity or oropharyngeal cancer
1 finding from 1 review

Carious dentin before cavity sealing vs Carious dentin after cavity sealing

MMP-2 expression/activity · Human ex vivo carious dentin under sealed cavities

MMP-2 shows no difference before vs after cavity sealing; the evidence is very uncertain (very low certainty).

1 finding from 1 review

Malocclusion vs No malocclusion

Poor oral health-related quality of life (OHRQoL) · Adolescents (10-19 years)

Malocclusions probably have a negative effect on OHRQoL in adolescents, after adjustment for confounders (moderate certainty).

1 finding from 1 review

Amalgam (AAG) vs Resin-modified glass ionomer cement (RMGIC)

Secondary caries · Patients requiring dental restoration; deciduous (primary) teeth

Over 2 or more years in deciduous teeth, amalgam probably had a higher risk of secondary caries than RMGIC (RR 2.46, 95% CI 1.42-4.27; moderate certainty).

1 finding from 1 review

Irradiated carious dentin vs Non-irradiated carious dentin

MMP-20 expression · Human ex vivo carious dentin (head/neck radiotherapy)

MMP-20 shows no difference between irradiated and non-irradiated carious dentin; the evidence is very uncertain (very low certainty).

1 finding from 1 review

PET-CT following chemoradiotherapy (neck dissection only if no/incomplete response) vs Planned neck dissection before or after chemoradiotherapy

Locoregional recurrence · Adults with oral cavity or oropharyngeal cancer with nodal disease (stage N2 or N3)

PET-CT following chemoradiotherapy (neck dissection only if… showed no clear difference in locoregional recurrence compared with planned neck dissection before or after chemoradiotherapy (moderate certainty).

1 finding from 1 review

Elective neck dissection (at time of primary tumour resection) vs Therapeutic (delayed) neck dissection

Locoregional recurrence · Adults with oral cavity cancer (tongue or floor of mouth) and clinically negative neck nodes

Elective neck dissection (at time of primary tumour resection) probably leads to lower locoregional recurrence compared with therapeutic (delayed) neck dissection (moderate certainty).

1 finding from 1 review

Full-time clear plastic (removable) retainer vs Any type of fixed (bonded) retainer

Adverse effects on oral health: gingival bleeding (lower arch) · People who had received fixed appliance orthodontic treatment

It is very uncertain whether full-time clear plastic (removable) retainer changes adverse effects on oral health: gingival bleeding (lower arch) compared with any type of fixed (bonded) retainer (very low certainty).

1 finding from 1 review

Herbal mouthwash vs Blank control

Plaque · People undergoing orthodontic treatment (any age; 9 to 34 years in included studies)

Herbal mouthwash reduced several plaque-related indices, but certainty is very low.

1 finding from 1 review

Giomer (GIONOMER) vs Resin-modified glass ionomer cement (RMGIC)

Secondary caries · Patients requiring dental restoration; deciduous (primary) teeth

Over 2 or more years in deciduous teeth, the difference in secondary caries between giomer and RMGIC is uncertain (RR 1.66, 95% CI 0.49-5.61; low certainty).

1 finding from 1 review

CPP-ACP enamel pre-treatment for prevention of white spot lesions before bonding metallic orthodontic brackets vs No enamel pre-treatment before bonding, or treatment with another material

Shear bond strength (SBS) of metallic orthodontic brackets · Extracted permanent human teeth (enamel); sound or demineralized

CPP-ACP enamel pre-treatment before bonding did not significantly affect the shear bond strength of metallic orthodontic brackets (MD 1.163 MPa, 95% CI -0.321 to 2.648; ungraded).

1 finding from 1 review

Elective radical (comprehensive) neck dissection vs Elective selective neck dissection

Recurrence · Adults with oral cavity cancer

It is very uncertain whether elective radical (comprehensive) neck dissection changes recurrence compared with elective selective neck dissection (very low certainty).

1 finding from 1 review

Gum chewing (sugar-free) vs No chewing gum

Salivary flow rate (unstimulated) · Elderly (>60 years) and medically compromised adults with xerostomia / dry mouth

In elderly and medically compromised people with xerostomia, chewing sugar-free gum daily for two or more weeks produces a small but statistically significant increase in unstimulated whole salivary flow rate versus no gum (SMD 0.44, 95% CI 0.22 to 0.66); certainty of evidence was not formally graded.

1 finding from 1 review

38% SDF (one-time application) vs Information unavailable

New coronal carious lesions or fillings on permanent (first) molars (caries prevention) · Children with dental caries in permanent (first) molars

One-time 38% SDF gave a 57% prevented fraction for caries in children's permanent first molars (single study; ungraded).

1 finding from 1 review

Full-time clear plastic (removable) retainer vs Any type of fixed (bonded) retainer

Stability: Little's Irregularity Index (lower arch) · People who had received fixed appliance orthodontic treatment

It is very uncertain whether full-time clear plastic (removable) retainer changes stability: Little's Irregularity Index (lower arch) compared with any type of fixed (bonded) retainer (very low certainty).

1 finding from 1 review

OHI + 38% SDF (applied every 12 months) vs oral health instruction plus water

new root-surface carious lesions or restorations · community-dwelling older adults with root caries

SDF had a 28% preventative fraction at 24 months; no pooled estimate or GRADE rating was reported.

1 finding from 1 review