Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,749 questions · 17,858 findings · 1,266 reviews

No studies found 4,359 · 24.4%GRADE not reported 2,348 · 13.1%Very low 4,634 · 25.9%Low 4,000 · 22.4%Moderate 2,052 · 11.5%High 465 · 2.6%

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Elective neck dissection (at time of primary tumour resection) vs Therapeutic (delayed) neck dissection

Locoregional recurrence · Adults with oral cavity cancer (tongue or floor of mouth) and clinically negative neck nodes

Elective neck dissection (at time of primary tumour resection) probably leads to lower locoregional recurrence compared with therapeutic (delayed) neck dissection (moderate certainty).

1 finding from 1 review

Elective radical (comprehensive) neck dissection vs Elective selective neck dissection

Recurrence · Adults with oral cavity cancer

It is very uncertain whether elective radical (comprehensive) neck dissection changes recurrence compared with elective selective neck dissection (very low certainty).

1 finding from 1 review

Elective neck dissection (at time of primary tumour resection) vs Therapeutic (delayed) neck dissection

Mortality (overall survival) · Adults with oral cavity cancer (tongue or floor of mouth) and clinically negative neck nodes

Elective neck dissection (at time of primary tumour resection) probably leads to lower mortality (overall survival) compared with therapeutic (delayed) neck dissection (moderate certainty).

1 finding from 1 review

Sentinel node biopsy (neck dissection only if biopsy positive) vs Elective neck dissection

Disease-free survival · Adults with oral cavity or oropharyngeal cancer

Sentinel node biopsy (neck dissection only if biopsy positive) showed no clear difference in disease-free survival (new disease, progression, and mortality) compared with elective neck dissection (low certainty).

1 finding from 1 review

Superselective neck dissection vs Elective selective neck dissection

Locoregional recurrence · Adults with oral cavity cancer (tongue or floor of mouth) and clinically negative neck nodes
1 finding from 1 review

Elective neck dissection (at time of primary tumour resection) vs Therapeutic (delayed) neck dissection

Disease-free survival · Adults with oral cavity cancer (tongue or floor of mouth) and clinically negative neck nodes

Elective neck dissection (at time of primary tumour resection) probably leads to lower disease-free survival (new disease, progression, and mortality) compared with therapeutic (delayed) neck dissection (moderate certainty).

1 finding from 1 review

Surgery plus radiotherapy vs Radiotherapy alone

Adverse events associated with treatment · Adults with oral cavity or oropharyngeal cancer
1 finding from 1 review

Light-emitting diode (LED) photobiomodulation vs Conventional orthodontic appliance treatment

Side effects or other adverse events · Adolescents and adults with malocclusion undergoing fixed orthodontic appliance treatment

The review found no eligible studies for this question.

1 finding from 1 review

PET-CT following chemoradiotherapy (neck dissection only if no/incomplete response) vs Planned neck dissection before or after chemoradiotherapy

Adverse events associated with treatment · Adults with oral cavity or oropharyngeal cancer with nodal disease (stage N2 or N3)
1 finding from 1 review

Light-emitting diode (LED) photobiomodulation vs Conventional orthodontic appliance treatment

Duration of orthodontic treatment: alignment stage (mandibular arch) · Adolescents and adults with malocclusion undergoing fixed orthodontic appliance treatment

It is very uncertain whether light-emitting diode (LED) photobiomodulation changes duration of orthodontic treatment: alignment stage (mandibular arch) compared with conventional orthodontic appliance treatment (very low certainty).

1 finding from 1 review

PET-CT following chemoradiotherapy (neck dissection only if no/incomplete response) vs Planned neck dissection before or after chemoradiotherapy

Disease-free survival · Adults with oral cavity or oropharyngeal cancer with nodal disease (stage N2 or N3)
1 finding from 1 review

Elective radical (comprehensive) neck dissection vs Elective selective neck dissection

Disease-free survival · Adults with oral cavity cancer

It is very uncertain whether elective radical (comprehensive) neck dissection changes disease-free survival (new disease, progression, and mortality) compared with elective selective neck dissection (very low certainty).

1 finding from 1 review

Chlorhexidine gel (0.2%, intrasocket) vs placebo or no treatment

Adverse events · Adults (>18 years) having permanent tooth extraction (predominantly mandibular third molars)
1 finding from 1 review
  • Local interventions for the management of alveolar osteitis (dry socket) 2022 · Cochrane All outcomes
    Follow-up: median 7 days
    No adverse events were reported. Six trials (673 participants) reported no adverse events from the use of chlorhexidine gel; one study (Rubio-Palau 2015) reported gastrointestinal discomfort (30, 18%), dizziness (10,…
    7 studies
    GRADE not reported

Neocone vs Alvogyl

Time to initial pain relief (minutes) · Adults (>18 years) with established dry socket following permanent tooth extraction

Neocone led to higher time to initial pain relief (minutes) compared with alvogyl; GRADE not reported.

1 finding from 1 review

Tranexamic acid (AMCA cones) vs Placebo (lactose cones)

Presence of dry socket · Adults (>18 years) having permanent tooth extraction (predominantly mandibular third molars)

Tranexamic acid (AMCA cones) showed no clear difference in presence of dry socket compared with placebo (lactose cones); GRADE not reported.

1 finding from 1 review

Primary closure of the extraction socket with a mucoperiosteal flap vs Application of platelet-rich fibrin (PRF) without primary closure

MRONJ (incidence proportion) · People on antiresorptive treatment undergoing tooth extraction (at risk of MRONJ)
1 finding from 1 review
  • All participants had complete mucosal coverage without any signs of MRONJ at the final control examination 90 days postoperatively (77 randomised; 1 RCT); no case of postoperative MRONJ in either group; effect not…
    1 study · 77 participants
    GRADE not reported