Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,127 questions · 1,590 findings · 132 reviews · Oral Health

No studies found 189 · 11.9%GRADE not reported 1,166 · 73.3%Very low 130 · 8.2%Low 69 · 4.3%Moderate 25 · 1.6%High 11 · 0.7%

NobelActive external connection implants vs NobelActive internal connection implants

Marginal bone level change · Adults with missing teeth who received osseointegrated root-formed oral implants, functionally loaded and followed for at least 1 year

NobelActive external connection implants showed no clear difference in marginal bone level change compared with nobelActive internal connection implants; GRADE not reported.

1 finding from 1 review

Removable appliance with palatal crib associated with high-pull chincup vs no treatment

Mandibular ramus growth · Children and adolescents (over 80% aged 16 years or younger at treatment start) with anterior open bite (lack of vertical overlap or…
1 finding from 1 review
  • Orthodontic and orthopaedic treatment for anterior open bite in children 2014 · Cochrane All outcomes
    End of treatment (12 months)
    Cephalometric data (SNA, Co-A, SNB, Ar-Go, Ar.GoMe, Co-Gn, ANB) were reported to be not significantly different between groups; effects were dento-alveolar rather than skeletal. No pooled estimate (Almeida 2005).
    1 study
    GRADE not reported

Branemark turned titanium screws vs IMZ TPS titanium cylinders

Implant failure · Adults with missing teeth who received osseointegrated root-formed oral implants, functionally loaded and followed for at least 1 year

Branemark turned titanium screws showed no clear difference in implant failure compared with IMZ TPS titanium cylinders; GRADE not reported.

1 finding from 1 review

NobelReplace Select Tapered implants vs NobelReplace implants

Implant failure · Adults with missing teeth who received osseointegrated root-formed oral implants, functionally loaded and followed for at least 1 year

NobelReplace Select Tapered implants showed no clear difference in implant failure compared with nobelReplace Groovy implants; GRADE not reported.

1 finding from 1 review

Higher circulating 25-hydroxyvitamin D (25(OH)D) concentration vs Lower circulating 25-hydroxyvitamin D (25(OH)D) concentration

Sporadic colorectal adenoma recurrence · Adults (general population)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for Sporadic colorectal adenoma recurrence: OR 0.87 (95% CI 0.57 to 1.33), not statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

1 finding from 1 review

Higher circulating 25-hydroxyvitamin D (25(OH)D) concentration vs Lower circulating 25-hydroxyvitamin D (25(OH)D) concentration

Ischaemic heart disease · Adults (general population)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for Ischaemic heart disease: HR 0.72 (95% CI 0.65 to 0.81), statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

1 finding from 1 review

Maxillary sinus lift (augmentation) with long implants vs Short implants (5 to 8.5 mm) without sinus augmentation

Patient preference · Patients with missing teeth and an atrophic posterior maxilla, with residual bone height between 4 and 9 mm below the maxillary sinus
1 finding from 1 review

ITI SLA standard (regular neck) implants vs ITI SLActive implants

Implant failure · Adults with missing teeth who received osseointegrated root-formed oral implants, functionally loaded and followed for at least 1 year

ITI SLA standard (regular neck) implants showed no clear difference in implant failure compared with ITI SLActive implants; GRADE not reported.

1 finding from 1 review

Higher maternal circulating 25-hydroxyvitamin D (25(OH)D) concentration vs Lower maternal circulating 25-hydroxyvitamin D (25(OH)D) concentration

Small‐for‐gestational age · pregnant women and their infants..

Meta-analysis of observational studies (higher vs lower maternal 25(OH)D) for Small for gestational age: OR 0.54 (95% CI 0.44 to 0.67), statistically significant. Umbrella review outcome-level evidence grade: Suggestive.

1 finding from 1 review

Higher circulating 1,25-dihydroxyvitamin D (1,25(OH)2D) concentration vs Lower circulating 1,25-dihydroxyvitamin D (1,25(OH)2D) concentration

Prostate cancer · Participants in observational studies

The meta-analysis of observational studies reported a OR of 0.99 (95% CI 0.87 to 1.12) for higher versus lower circulating vitamin D concentration.

1 finding from 1 review

Higher circulating 25-hydroxyvitamin D (25(OH)D) concentration vs Lower circulating 25-hydroxyvitamin D (25(OH)D) concentration

Breast cancer · Adults (general population)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for Breast cancer (Premenopausal): RR 1.01 (95% CI 0.97 to 1.06), not statistically significant. Umbrella review outcome-level evidence grade: Substantial effect unlikely.

3 findings from 1 review

Ankylos Plus (Dentsply) implants vs Seven (Sweden & Martina) implants

Marginal bone level change · Adults with missing teeth who received osseointegrated root-formed oral implants, functionally loaded and followed for at least 1 year

Ankylos Plus (Dentsply) implants showed no clear difference in marginal bone level change compared with seven (Sweden & Martina) implants; GRADE not reported.

1 finding from 1 review

Higher circulating 25-hydroxyvitamin D (25(OH)D) concentration vs Lower circulating 25-hydroxyvitamin D (25(OH)D) concentration

All cause mortality · people with chronic kidney disease (predialysis (GFR 15 to 60 mL/min/1.73 m²), HD, PD, transplant recipients)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for All cause mortality, Patients with chronic kidney disease: RR 0.86 (95% CI 0.81 to 0.92), statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

1 finding from 1 review

Higher circulating 25-hydroxyvitamin D (25(OH)D) concentration vs Lower circulating 25-hydroxyvitamin D (25(OH)D) concentration

Metabolic syndrome (prevalent) · Adults (general population)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for Metabolic syndrome (prevalent): OR 0.49 (95% CI 0.38 to 0.64), statistically significant. Umbrella review outcome-level evidence grade: Suggestive.

1 finding from 1 review

Higher circulating 25-hydroxyvitamin D (25(OH)D) concentration vs Lower circulating 25-hydroxyvitamin D (25(OH)D) concentration

Cognitive function · Adults (general population)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for Cognition: OR 0.42 (95% CI 0.34 to 0.53), statistically significant. Umbrella review outcome-level evidence grade: Suggestive.

1 finding from 1 review

Higher maternal circulating 25-hydroxyvitamin D (25(OH)D) concentration vs Lower maternal circulating 25-hydroxyvitamin D (25(OH)D) concentration

Pre‐eclampsia · pregnant women and their infants..

Meta-analysis of observational studies (higher vs lower maternal 25(OH)D) for Pre-eclampsia: OR 0.56 (95% CI 0.39 to 0.80), statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

1 finding from 1 review

Southern regular implants vs Southern wide implants

Implant failure · Adults with missing teeth who received osseointegrated root-formed oral implants, functionally loaded and followed for at least 1 year

Southern regular implants showed no clear difference in implant failure compared with southern wide implants; GRADE not reported.

1 finding from 1 review

Turned (smoother) implant surfaces vs Roughened implant surfaces

Early implant failure · Adults with missing teeth who received osseointegrated root-formed oral implants, functionally loaded and followed for at least 1 year

Turned (smoother) implant surfaces showed no clear difference in early implant failure compared with roughened implant surfaces (low certainty).

1 finding from 1 review

Astra TiO2-blasted titanium screws vs Branemark turned titanium screws

Implant failure · Adults with missing teeth who received osseointegrated root-formed oral implants, functionally loaded and followed for at least 1 year

Astra TiO2-blasted titanium screws showed no clear difference in implant failure compared with branemark turned titanium screws; GRADE not reported.

1 finding from 1 review

Higher maternal circulating 25-hydroxyvitamin D (25(OH)D) concentration vs Lower maternal circulating 25-hydroxyvitamin D (25(OH)D) concentration

Head circumference (mm) · pregnant women and their infants..

Meta-analysis of observational studies (higher vs lower maternal 25(OH)D) for Head circumference: WMD 0.05 (95% CI -0.24 to 0.34), not statistically significant. Umbrella review outcome-level evidence grade: Suggestive.

1 finding from 1 review