Findings

What do systematic reviews say?

6 questions · 10 findings · 1 reviews

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No studies found 2 · 20%GRADE not reported 4 · 40%Very low 1 · 10%Low 3 · 30%Moderate 0 · 0%High 0 · 0%

Direct composite resin restoration vs Amalgam restoration

Restoration failure · People with permanent or adult posterior teeth requiring restoration (parallel-group trials involved children aged 6 to 12 years)

Direct composite resin restoration may leads to higher restoration failure rate compared with amalgam restoration (low certainty).

3 findings from 1 review

Direct composite resin fillings versus amalgam fillings for permanent posterior teeth 2021 · Cochrane All outcomes
Follow-up: 5 to 7 years
RR 1.89 [1.52, 2.35]
2 studies · 921 participants
Low
Direct composite resin fillings versus amalgam fillings for permanent posterior teeth 2021 · Cochrane All outcomes
Follow-up >= 3 years · Parallel-group and split-mouth trials combined
RR 1.65 [1.13, 2.40]
8 studies
GRADE not reported
Direct composite resin fillings versus amalgam fillings for permanent posterior teeth 2021 · Cochrane All outcomes
Follow-up >= 3 years · Split-mouth trials
RR 1.33 [0.84, 2.11]
6 studies
GRADE not reported

Direct composite resin restoration vs Amalgam restoration

Fracture of restorations · People with permanent or adult posterior teeth requiring restoration (parallel-group trials involved children aged 6 to 12 years)

Direct composite resin restoration showed no clear difference in fracture of restorations compared with amalgam restoration (low certainty).

1 finding from 1 review

Direct composite resin fillings versus amalgam fillings for permanent posterior teeth 2021 · Cochrane All outcomes
Follow-up: 5 to 7 years
RR 0.87 [0.46, 1.64]
2 studies · 921 participants
Low

Direct composite resin restoration vs Amalgam restoration

Harms (toxicity and postoperative sensitivity) · People with permanent or adult posterior teeth requiring restoration (parallel-group trials involved children aged 6 to 12 years)

1 finding from 1 review

Direct composite resin fillings versus amalgam fillings for permanent posterior teeth 2021 · Cochrane All outcomes
Follow-up: 2 weeks to 7 years
SoF (Harms, follow-up 2 weeks to 7 years): See comments; 3 studies; certainty very low (⊕⊝⊝⊝). Comments: data were reported for physical development, neurological and psychological effects, neurobehavioural and…
3 studies
Very low

Direct composite resin restoration vs Amalgam restoration

Secondary caries · People with permanent or adult posterior teeth requiring restoration (parallel-group trials involved children aged 6 to 12 years)

Direct composite resin restoration showed no clear difference in secondary caries compared with amalgam restoration; GRADE not reported.

3 findings from 1 review

Direct composite resin fillings versus amalgam fillings for permanent posterior teeth 2021 · Cochrane All outcomes
Follow-up >= 3 years · Parallel-group and split-mouth trials combined
RR 1.93 [0.98, 3.80]
7 studies
GRADE not reported
Direct composite resin fillings versus amalgam fillings for permanent posterior teeth 2021 · Cochrane All outcomes
Follow-up >= 3 years · Split-mouth trials
RR 1.30 [0.34, 4.97]
5 studies
GRADE not reported
Direct composite resin fillings versus amalgam fillings for permanent posterior teeth 2021 · Cochrane All outcomes
Follow-up: 5 to 7 years
RR 2.14 [1.67, 2.74]
2 studies · 921 participants
Low

Direct composite resin restoration vs Amalgam restoration

Allergic reaction · People with permanent or adult posterior teeth requiring restoration (parallel-group trials involved children aged 6 to 12 years)

The review found no eligible studies for this question.

1 finding from 1 review

Direct composite resin fillings versus amalgam fillings for permanent posterior teeth 2021 · Cochrane All outcomes
We did not find any eligible studies that evaluated allergic reaction or injury (no studies reported on outcomes of relevance to allergic reaction).
0 studies
No studies found

Direct composite resin restoration vs Amalgam restoration

Harms: injury · People with permanent or adult posterior teeth requiring restoration (parallel-group trials involved children aged 6 to 12 years)

The review found no eligible studies for this question.

1 finding from 1 review

Direct composite resin fillings versus amalgam fillings for permanent posterior teeth 2021 · Cochrane All outcomes
We did not find any eligible studies that evaluated allergic reaction or injury (no studies reported on outcomes of relevance to injury).
0 studies
No studies found