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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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Bulk-fill composite resin with 7-second dentine etching vs Bulk-fill composite resin with 15-second dentine etching

Treatment failure (annual failure rate) · Children (aged 5-8 years) with Class-II caries in primary molars, no pulp therapy

Etching dentine for 7 s rather than 15 s lowered bulk-fill composite failure (5.8% vs 16.9% annual failure) in one RCT; low quality of evidence (ungraded).

1 finding from 1 review

Higher parental education (tertiary) vs Parental high school (secondary) education

Early childhood caries (ECC) · Healthy children under 6 years in South Africa

Parental tertiary education (vs high-school education) was associated with about 1.8 times higher odds of early childhood caries in South Africa (OR 1.77, 95% CI 1.22-2.57; 2 studies; not GRADE-rated).

1 finding from 1 review

Chlorhexidine rinse (0.12% and 0.2%, pre- and post-extraction) vs placebo or no treatment

Adverse events · Adults (>18 years) having permanent tooth extraction (predominantly mandibular third molars)
1 finding from 1 review
  • Local interventions for the management of alveolar osteitis (dry socket) 2022 · Cochrane All outcomes
    Follow-up: median 7 days
    3 trials reported no adverse events. 1 study reported adverse events (alterations in taste, bad taste, staining) in 24/62 in chlorhexidine group versus 0/40 in placebo group, Peto OR = 8.42 (95% CI 3.31 to 21.39). A…
    6 studies
    GRADE not reported

Iodine tampon vs Saline irrigation (monoject syringe)

Presence of dry socket · Adults (>18 years) having permanent tooth extraction (predominantly mandibular third molars)
1 finding from 1 review

Antiretroviral therapy (any, including cART) vs No antiretroviral medication (treatment-naive)

Angular cheilitis prevalence · Children and adolescents (<18 years) living with HIV (CLWH)

No significant difference in angular cheilitis between CLWH with and without ART (very low certainty).

1 finding from 1 review

Fluoride-free nano-/micro-hydroxyapatite (nHA) dentifrice vs Control (regular fluoride) dentifrice

Caries lesion initiation/progression (ICDAS score, laser fluorescence/DIAGNOdent, photographic pixels, enamel acid resistance) · Patients (children and adults, age 3-40 years) with initial enamel caries lesions (non-orthodontic and orthodontic)

No meta-analysis was possible for the 5 in vivo RCTs (high heterogeneity); narratively nHA showed generally no significant difference versus fluoridated dentifrice, and the evidence was not graded (ungraded).

1 finding from 1 review
  • Efficacy of nano-hydroxyapatite on caries prevention-a systematic review and meta-analysis. 2022 All outcomes
    Median follow-up 6 months (range 6-12 months) · In vivo (clinical); non-orthodontic and orthodontic patients
    No meta-analysis was performed for the in vivo studies owing to high heterogeneity (population, control group, outcomes, follow-up periods, risk of bias) and differing statistical designs (e.g., non-inferiority);…
    5 studies · 420 participants
    GRADE not reported

Antiretroviral therapy (any, including cART) vs No antiretroviral medication (treatment-naive)

Ulcerative stomatitis prevalence · Children and adolescents (<18 years) living with HIV (CLWH)

Ulcerative stomatitis was significantly more prevalent in treatment-naive CLWH than in those on ART (very low certainty).

1 finding from 1 review

Hypnosis vs relaxation

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · People aged 12 years and over with painful TMD lasting 3 months or longer

Hypnosis showed no clear difference in pain intensity compared with relaxation; GRADE not reported.

1 finding from 1 review
  • Psychological therapies for temporomandibular disorders (TMDs) 2022 · Cochrane All outcomes
    Treatment completion
    Not pooled (clinical heterogeneity). Abrahamsen 2011: MD -1.00 (95% CI -2.27 to 0.27), n=38 (hypnosis 19, relaxation 19); Stam 1984: MD not reported, n=27 (hypnosis 12, relaxation 15).
    2 studies · 65 participants
    GRADE not reported

Habit reversal vs waiting list control

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · People aged 12 years and over with painful TMD lasting 3 months or longer

Habit reversal treatment led to lower pain intensity compared with waiting-list control; GRADE not reported.

1 finding from 1 review

Metal-free single crowns (full-contour zirconia) vs Composite strip crown

Treatment failure (annual failure rate) · Children (aged 3-5.5 years) with early childhood caries in anterior primary teeth (>=2 carious surfaces), no pulp therapy

Zirconia crowns failed less than composite strip crowns (3.3% vs 15% annual failure) in one RCT; low quality of evidence (ungraded).

1 finding from 1 review

Alvogyl vs no treatment

Pain (VAS) · Adults (>18 years) with established dry socket following permanent tooth extraction
1 finding from 1 review

Povidone iodine vs Ozonated water

Reduction in level of contamination by particles <=5 um (droplet nuclei) at >=2 m from patient's oral cavity · Dental patients undergoing aerosol-generating procedures (AGPs) and the dental healthcare providers treating them

It is very uncertain whether povidone iodine changes reduction in level of contamination by particles <=5 um (droplet… compared with ozonated water (very low certainty).

2 findings from 1 review

Living with HIV and undergoing antiretroviral therapy (ART/HAART) vs Healthy HIV-negative controls

Acute necrotizing ulcerative gingivitis/periodontitis (WHO clinical stage 3) · Children or adolescents

No eligible studies reported acute necrotizing ulcerative gingivitis/periodontitis.

1 finding from 1 review

Periodontal treatment (subgingival instrumentation, with or without antimicrobials/surgery) vs usual care or no treatment

Percentage of bleeding on probing (BOP) · People with diabetes mellitus (type 1 or type 2, mostly type 2) and periodontitis, at least 16 years of age

Periodontal treatment (subgingival instrumentation, with or without… led to lower bleeding on probing (BOP) compared with no active intervention/usual care; GRADE not reported.

1 finding from 1 review

Baby-led weaning (BLW) vs Other models of complementary feeding

Overweight/obesity risk · Healthy children aged 6–24 months in Western industrialized countries

BLW was associated with lower overweight/obesity risk in observational studies, but the certainty was very low.

1 finding from 1 review