Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

41 questions · 45 findings · 6 reviews

No studies found 12 · 26.7%GRADE not reported 19 · 42.2%Very low 7 · 15.6%Low 3 · 6.7%Moderate 4 · 8.9%High 0 · 0%

Low‐level laser therapy vs Placebo (sham) laser therapy

Mucositis severity (mild to moderate) · People with cancer receiving chemotherapy or radiotherapy (or both) who have oral mucositis

Low level laser therapy led to higher mucositis severity (mild to moderate) compared with sham (placebo) laser treatment; GRADE not reported.

1 finding from 1 review

Low‐level laser therapy vs Control (no laser device used)

Maximum pain (verbal rating scale, VRS) · People requiring retreatment of periapical lesions (failed root canal therapy)

It is very uncertain whether low energy level laser therapy (LLLT) changes maximum pain (verbal rating scale, VRS) compared with control (no laser device used) (very low certainty).

1 finding from 1 review

Low-level laser therapy (LLLT) + calcium hydroxide vs Calcium hydroxide (CH)

Radiological failure · Children with extensive decay involving the dental pulp in primary teeth

Low-level laser therapy (LLLT) + calcium hydroxide showed no clear difference in radiological failure compared with calcium hydroxide (CH); GRADE not reported.

1 finding from 1 review