Findings

What do systematic reviews say?

7 questions · 7 findings · 2 reviews · Orthodontics

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No studies found 1 · 14.3%GRADE not reported 0 · 0%Very low 5 · 71.4%Low 1 · 14.3%Moderate 0 · 0%High 0 · 0%

Hyperbaric oxygen (following replantation) vs control

Tooth survival · People with avulsed and replanted permanent (front) teeth

It is very uncertain whether hyperbaric oxygen (following replantation) changes tooth survival at 12 months compared with control (very low certainty).

1 finding from 1 review

Interventions for treating traumatised permanent front teeth: avulsed (knocked out) and replanted 2019 · Cochrane All outcomes
12 months
RR 1.21 [1.07, 1.36]
1 study · 69 participants
Very low

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

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

It is very uncertain whether CAD/CAM nitinol fixed (bonded) retainer changes survival of retainers (failure, lower arch) compared with conventional/analogue multistrand fixed (bonded) retainer (very low certainty).

1 finding from 1 review

Retention procedures for stabilising tooth position after treatment with orthodontic braces 2023 · Cochrane All outcomes
12 months · lower arch
RR 1.29 [0.67, 2.49]
1 study · 41 participants
Very low

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

Retention procedures for stabilising tooth position after treatment with orthodontic braces 2023 · Cochrane All outcomes
12 months · lower arch
RR 3.42 [1.38, 8.47]
1 study · 77 participants
Very low

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

Retention procedures for stabilising tooth position after treatment with orthodontic braces 2023 · Cochrane All outcomes
12 months · lower arch
RR 1.01 [0.84, 1.21]
7 studies · 1337 participants
Low

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

Retention procedures for stabilising tooth position after treatment with orthodontic braces 2023 · Cochrane All outcomes
12 months · lower arch
RR 0.44 [0.20, 0.98]
1 study · 57 participants
Very low

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

Survival: mean survival time (lower arch, months) · People who had received fixed appliance orthodontic treatment

The review found no eligible studies for this question.

1 finding from 1 review

Retention procedures for stabilising tooth position after treatment with orthodontic braces 2023 · Cochrane All outcomes
12 months · lower arch
No RCTs at 12-month follow-up; 2 RCTs at 24 months: earlier failures with fibre-reinforced composite (MD -1.48, 95% CI -1.88 to -1.08; very low-certainty)
0 studies
No studies found

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

Retention procedures for stabilising tooth position after treatment with orthodontic braces 2023 · Cochrane All outcomes
12 months · upper and lower arches
RR 0.60 [0.43, 0.83]
1 study · 111 participants
Very low