Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,410 questions · 8,901 findings · 1,091 reviews

No studies found 1,687 · 19%GRADE not reported 1,469 · 16.5%Very low 1,969 · 22.1%Low 2,060 · 23.1%Moderate 1,302 · 14.6%High 414 · 4.7%

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Full-time clear plastic (removable) retainer vs Any type of fixed (bonded) retainer

Survival of retainers (failure, lower arch) · People who had received fixed appliance orthodontic treatment

It is very uncertain whether full-time clear plastic (removable) retainer changes survival of retainers (failure, lower arch) compared with any type of fixed (bonded) retainer (very low certainty).

1 finding from 1 review

Fibre-reinforced composite fixed (bonded) retainer vs Multistrand / spiral wire fixed (bonded) retainer

Survival of retainers (failure, lower arch) · People who had received fixed appliance orthodontic treatment

Fibre-reinforced composite fixed (bonded) retainer showed no clear difference in survival of retainers (failure, lower arch) compared with multistrand / spiral wire fixed (bonded) retainer (low certainty).

1 finding from 1 review

Part-time clear plastic (removable) retainer vs Any type of fixed (bonded) retainer

Survival of retainers (failure, lower arch) · People who had received fixed appliance orthodontic treatment

It is very uncertain whether part-time clear plastic (removable) retainer changes survival of retainers (failure, lower arch) compared with any type of fixed (bonded) retainer (very low certainty).

1 finding from 1 review

Hawley removable retainer vs Clear plastic removable retainer

Stability: Little's Irregularity Index (lower arch) · People who had received fixed appliance orthodontic treatment

It is very uncertain whether hawley removable retainer changes stability: Little's Irregularity Index (lower arch) compared with clear plastic removable retainer (very low certainty).

1 finding from 1 review

Fibre-reinforced composite fixed (bonded) retainer vs Multistrand / spiral wire fixed (bonded) retainer

Adverse effects on oral health: bleeding on probing (lower arch) · People who had received fixed appliance orthodontic treatment

The review found no eligible studies for this question.

1 finding from 1 review

Hawley removable retainer vs Clear plastic removable retainer

Survival of retainers (failure/how many failed) · People who had received fixed appliance orthodontic treatment

It is very uncertain whether hawley removable retainer changes survival of retainers (failure, upper and lower arches) compared with clear plastic removable retainer (very low certainty).

1 finding from 1 review

Hawley removable retainer vs Clear plastic removable retainer

Patient satisfaction: comfort (VAS, upper and lower arches) · People who had received fixed appliance orthodontic treatment

The review found no eligible studies for this question.

1 finding from 1 review

Early childhood caries / severe early childhood caries vs Caries-free controls

Stunting · Children aged ≤6 years (early childhood)

One Nepalese cross-sectional study found caries severity significantly correlated with chronic malnutrition/stunting (HAZ; p<0.0001), especially in rural children; ungraded, no effect size reported.

3 findings from 1 review

CAD/CAM nitinol fixed (bonded) retainer vs Multistrand / spiral wire fixed (bonded) retainer

Adverse effects on oral health: Gingival Index (lower arch) · People who had received fixed appliance orthodontic treatment

CAD/CAM nitinol fixed (bonded) retainer showed no clear difference in adverse effects on oral health: Gingival Index (lower arch) compared with conventional/analogue multistrand fixed (bonded) retainer (low certainty).

1 finding from 1 review

Doxycycline vs prednisolone

Quality of life (DLQI) adjusted for baseline DLQI, disease severity, age, Karnovsky score, baseline versus week 52. A lower score is more favourable. · bullous pemphigoid
1 finding from 1 review