Findings

What do systematic reviews say?

104 questions · 140 findings · 19 reviews

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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%

Single-stage alginate impression (simplified method) vs Two stage-two step zinc-oxide eugenol (ZoE) traditional method

Oral health-related quality of life · Completely edentulous people

It is very uncertain whether single-stage alginate impression (simplified method) changes participant-reported oral health-related quality of life (OHIP-EDENT) compared with two stage-two step zinc-oxide eugenol (ZoE) traditional method (very low certainty).

1 finding from 1 review

Final‐impression techniques and materials for making complete and removable partial dentures 2018 · Cochrane All outcomes
6 months
MD 0.5 [-2.67, 3.67]
1 study · 39 participants
Very low

Single-stage alginate impression (simplified method) vs Two stage-two step elastomer (silicone, polysulfide, or polyether) conventional method

Oral health-related quality of life · Completely edentulous people

It is very uncertain whether single-stage alginate impression (simplified method) changes participant-reported oral health-related quality of life (OHIP-EDENT) compared with two stage-two step elastomer (silicone, polysulfide, or polyether)… (very low certainty).

1 finding from 1 review

Final‐impression techniques and materials for making complete and removable partial dentures 2018 · Cochrane All outcomes
1 month
MD 0.05 [-2.37, 2.47]
2 studies · 98 participants
Very low

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

Malocclusions and quality of life among adolescents: a systematic review and meta-analysis. 2023 All outcomes
Schools and dental clinics (multiple countries)
Impaired OHRQoL, qualitative synthesis: relative effect not estimable across the 13 studies (13,864 participants); moderate quality of evidence (GRADE).
13 studies · 13864 participants
Moderate

Alginate (two stage-two step final/wash impression) vs Silicone elastomer (two stage-two step)

Oral health-related quality of life · Completely edentulous people

Alginate (two stage-two step final/wash impression) may leads to higher participant-reported oral health-related quality of life… compared with silicone elastomer (two stage-two step) (low certainty).

1 finding from 1 review

Final‐impression techniques and materials for making complete and removable partial dentures 2018 · Cochrane All outcomes
2 weeks
MD 7.20 [2.71, 11.69]
1 study · 144 participants
Low