Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

104 questions · 140 findings · 19 reviews

No studies found 11 · 7.9%GRADE not reported 103 · 73.6%Very low 14 · 10%Low 2 · 1.4%Moderate 5 · 3.6%High 5 · 3.6%

Country-level periodontal disease prevalence (Global Burden of Disease) vs Low vs high periodontal disease prevalence

Oral health-related quality of life · people aged 60 years and older living in the community

OHRQoL did not differ significantly by country-level periodontal disease prevalence; no pooled estimate was reported in the text (ungraded).

1 finding from 1 review

Country-level income (World Bank income classification) vs Higher- vs lower-income country categories

Oral health-related quality of life · people aged 60 years and older living in the community

Community-dwelling older adults in higher-income countries had better OHRQoL than those in lower-income countries (77.9, 95% CI 70.2 to 85.6 vs 66.9, 95% CI 56.7 to 77.0); the difference by income was statistically significant (ungraded).

2 findings from 1 review

Country-level income inequality (Gini index) vs Lower vs higher income inequality categories

Oral health-related quality of life · people aged 60 years and older living in the community

Older adults in countries with relative income equality (low Gini index) had markedly higher OHRQoL (91.3, 95% CI 90.0 to 92.6) than those in less equal countries; the difference by Gini index was statistically significant (ungraded).

4 findings from 1 review
Show 1 more finding

Human Development Index (HDI) vs Higher vs lower HDI categories

Oral health-related quality of life · people aged 60 years and older living in the community

Older adults in higher-HDI countries had better OHRQoL (high 79.9, 95% CI 74.4 to 85.5; very high 78.4, 95% CI 71.1 to 85.8) than those in medium-HDI countries (63.5, 95% CI 54.3 to 72.7); the difference by HDI was statistically significant (ungraded).

3 findings from 1 review

Country-level unemployment rate vs Higher vs lower unemployment-rate categories

Oral health-related quality of life · people aged 60 years and older living in the community

OHRQoL did not differ significantly across country-level unemployment-rate categories; no pooled estimate was reported in the text (ungraded).

1 finding from 1 review

Health expenditure per capita vs Higher vs lower per-capita health expenditure categories

Oral health-related quality of life · people aged 60 years and older living in the community

OHRQoL did not differ significantly across per-capita health-expenditure categories; no pooled estimate was reported in the text (ungraded).

1 finding from 1 review

Country-level edentulism prevalence (Global Burden of Disease) vs Low vs high edentulism prevalence

Oral health-related quality of life · people aged 60 years and older living in the community

OHRQoL did not differ significantly by country-level edentulism prevalence; no pooled estimate was reported in the text (ungraded).

1 finding from 1 review

Out-of-pocket health expenditure vs Lower vs higher out-of-pocket expenditure categories

Oral health-related quality of life · people aged 60 years and older living in the community

Lower out-of-pocket health expenditure was associated with better OHRQoL (83.9, 95% CI 75.2 to 92.6 vs 67.5, 95% CI 58.5 to 76.5); the difference was statistically significant (ungraded).

2 findings from 1 review

Country-level dental caries prevalence (Global Burden of Disease) vs Low vs high dental caries prevalence

Oral health-related quality of life · people aged 60 years and older living in the community

Lower country-level dental caries prevalence was associated with better OHRQoL (low-prevalence pooled mean 81.5, 95% CI 76.5 to 86.6, higher than high-prevalence countries); statistically significant (ungraded).

1 finding from 1 review

Dental fluorosis (assessed by TFI or WHO criteria) vs Individuals without dental fluorosis

Oral health-related quality of life · Indian children and young adults

Two studies found dental fluorosis significantly associated with poorer OHRQoL; narrative, ungraded.

1 finding from 1 review

Dental caries vs Caries-free controls

Oral health-related quality of life · Indian children aged 3-5 years

In children aged 3-5 years, early childhood caries was significantly associated with poorer OHRQoL (narrative; 3 studies); ungraded.

1 finding from 1 review

Disability (developmental, intellectual, or sensory) vs Persons without disabilities

Oral health-related quality of life · Persons with disabilities (children and adults with autism, Down syndrome, cerebral palsy, hearing impairment, or multiple disabilities)…

Persons with disabilities in Saudi Arabia report poorer overall oral health-related quality of life and greater oral-health impact than those without disabilities, synthesized narratively without a pooled estimate (ungraded).

1 finding from 1 review

Dental cavity liner (e.g. calcium hydroxide, glass ionomer, resin-modified glass ionomer, or flowable composite) placed under the restoration vs No cavity liner or a different liner material

Oral health-related quality of life · Patients with deep caries lesions in mature or immature permanent (posterior) teeth, with no symptoms or reversible pulpitis

No included study reported oral health-related quality of life (a planned outcome), so no evidence is available.

1 finding from 1 review

Partial pulpotomy vs Full (complete) pulpotomy

Oral health-related quality of life · Mature permanent (molar) teeth with deep caries and symptoms indicative of irreversible pulpitis (spontaneous pain)

No included study reported oral health-related quality of life (a planned outcome), so no evidence is available.

1 finding from 1 review

Light vibrational forces (LVF) vs Conventional orthodontic appliance treatment

Oral health-related quality of life · Adolescents and adults with malocclusion undergoing orthodontic treatment with fixed or removable appliances
1 finding from 1 review

Routine scale and polish every 6 months vs Routine scale and polish every 12 months

Oral health-related quality of life · Dentate adults without severe periodontitis, regularly attending for dental care in primary care (UK general dental practice)

Routine scale and polish every 6 months showed no clear difference in oral health-related quality of life (OHIP-14) compared with routine scale and polish every 12 months (high certainty).

1 finding from 1 review

Routine scale and polish at a fixed interval vs No scheduled scale and polish treatment

Oral health-related quality of life · Dentate adults without severe periodontitis, regularly attending for dental care in primary care (UK general dental practice)

Planned, regular routine scale and polish (6-monthly; 12-monthly… showed no clear difference in oral health-related quality of life (OHIP-14) compared with no scheduled scale and polish treatment (high certainty).

1 finding from 1 review

Biofunctional Prosthetic System (BPS): closed-mouth two stage-two step final impression with addition silicone elastomer vs Conventional complete denture technique (CCD): open-mouth two stage-two step conventional technique using elastomer

Oral health-related quality of life · Completely edentulous people
1 finding from 1 review