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What do systematic reviews say?

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Evidence found and GRADE certainty

2,916 questions · 3,207 findings · 167 reviews · related questions CL0289

No studies found 596 · 18.6%GRADE not reported 1,666 · 51.9%Very low 603 · 18.8%Low 252 · 7.9%Moderate 78 · 2.4%High 12 · 0.4%

Altered fractionation radiotherapy (hyperfractionated and/or accelerated) vs Conventional (standard) fractionation radiotherapy

Total mortality · People with primary squamous cell carcinoma of the oral cavity (ICD-O C01-C06) or oropharynx (ICD-O C09-C10); head and neck cancer trials…

Hyperfractionated/accelerated radiotherapy showed no clear difference in total mortality compared with conventional (standard) fractionation radiotherapy; GRADE not reported.

1 finding from 1 review

Clotrimazole 50 mg (partially absorbed) vs Clotrimazole 10 mg (partially absorbed)

Mycological: eradication of oral candidiasis · Patients with cancer receiving chemotherapy and/or radiotherapy with overt oral candidiasis

Clotrimazole 50 mg (partially absorbed) led to higher mycological: eradication of oral candidiasis compared with clotrimazole 10 mg (partially absorbed); GRADE not reported.

1 finding from 1 review

Bio-Oss (anorganic bovine bone) vs Bovine-derived xenograft (Bio-Oss) plus resorbable barrier

Poor aesthetics measured by patient (after restoration) · Patients receiving immediate single implants in fresh extraction sockets (maxillary anterior/premolar sites)

Bio-Oss (anorganic bovine bone) led to lower poor aesthetics measured by patient (after restoration) compared with bio-Oss + resorbable barrier; GRADE not reported.

1 finding from 1 review

Pre-operative and post-operative radiotherapy vs Post-operative radiotherapy alone

Total mortality · People with primary squamous cell carcinoma of the oral cavity (ICD-O C01-C06) or oropharynx (ICD-O C09-C10); head and neck cancer trials…

Pre-operative and post-operative radiotherapy showed no clear difference in total mortality compared with post-operative radiotherapy alone; GRADE not reported.

1 finding from 1 review

Altered fractionation radiotherapy plus chemotherapy vs Chemoradiotherapy with standard (conventional) fractionation

Outcome not reported · People with primary squamous cell carcinoma of the oral cavity (ICD-O C01-C06) or oropharynx (ICD-O C09-C10); head and neck cancer trials…

The review found no eligible studies for this question.

1 finding from 1 review

Immediate-delayed implants (placed within 8 weeks after tooth extraction) vs Delayed implants (placed at least 2 months after extraction)

Patients' perception of how long treatment took · Patients with compromised teeth to be extracted who require single dental implants in fresh postextraction sockets

Immediate-delayed implants (placed within 8 weeks after tooth… led to lower patients' perception of how long treatment took compared with delayed implants (placed at least 2 months after extraction); GRADE not reported.

1 finding from 1 review

Mechanical debridement plus topical minocycline vs Mechanical debridement plus chlorhexidine gel

Change in probing pocket depth (worst sites) · Adults with dental implants and peri-implant mucositis at baseline

Mechanical debridement plus topical minocycline showed no clear difference in change in probing pocket depth (worst sites) compared with mechanical debridement plus chlorhexidine gel; GRADE not reported.

1 finding from 1 review

GM-CSF vs povidone‐iodine

Time to heal mucositis (days) · People with cancer receiving chemotherapy or radiotherapy (or both) who have oral mucositis

Granulocyte macrophage-colony stimulating factor (GM-CSF) led to lower time to heal mucositis (days) compared with povidone iodine; GRADE not reported.

1 finding from 1 review

Autogenous bone graft augmentation at the immediate implant site vs No augmentation

Bone gain (horizontal - HDD) · Patients receiving immediate single implants in fresh extraction sockets (maxillary anterior/premolar sites)

Autogenous bone graft augmentation at the immediate implant site showed no clear difference in bone gain (horizontal - HDD) compared with no augmentation; GRADE not reported.

1 finding from 1 review

Orthodontic treatment with appliances inducing stable, permanent orthodontic tooth movement (splints worn 8 to 12 weeks and surgical interventions excluded) vs Control: no treatment, placebo, or reassurance

Development of TMD (onset/incidence of signs and symptoms) · People without TMD at baseline undergoing orthodontic treatment (TMD clinically absent at baseline); no age restriction provided follow-up…

The review found no eligible studies for this question.

1 finding from 1 review

Accelerated radiotherapy (no split, boost or hyperfractionation) vs Conventional (standard) fractionation radiotherapy

Disease-free survival · People with primary squamous cell carcinoma of the oral cavity (ICD-O C01-C06) or oropharynx (ICD-O C09-C10); head and neck cancer trials…
1 finding from 1 review

Hyperfractionated/accelerated split-course radiotherapy vs Accelerated radiotherapy with concomitant boost

Disease-free survival · People with primary squamous cell carcinoma of the oral cavity (ICD-O C01-C06) or oropharynx (ICD-O C09-C10); head and neck cancer trials…
1 finding from 1 review

Orthodontic treatment with appliances inducing stable, permanent orthodontic tooth movement (splints worn 8 to 12 weeks and surgical interventions excluded) vs Control: no treatment, placebo, or reassurance

Overall symptoms, pain and headache (relief from symptoms assessed by global measures) · Adults aged 18 years or older with clinically diagnosed TMD (exhibiting two or more of the listed signs and/or symptoms)

The review found no eligible studies for this question.

1 finding from 1 review

Pre-operative radiotherapy (plus surgery) vs surgery

Locoregional control · People with primary squamous cell carcinoma of the oral cavity (ICD-O C01-C06) or oropharynx (ICD-O C09-C10); head and neck cancer trials…

Pre-operative radiotherapy (plus surgery) showed no clear difference in locoregional control compared with surgery alone; GRADE not reported.

1 finding from 1 review

Altered fractionation radiotherapy vs Chemoradiotherapy (concurrent, standard fractionation)

Outcome not reported · People with primary squamous cell carcinoma of the oral cavity (ICD-O C01-C06) or oropharynx (ICD-O C09-C10); head and neck cancer trials…

The review found no eligible studies for this question.

1 finding from 1 review

Hypnosis vs No hypnosis (no hypnotic intervention)

Orthodontic appliance (headgear) wearing time and patient co-operation · Children (mean age approximately 10 years) with skeletal Class II division 1 malocclusion undergoing orthodontic treatment with cervical…
1 finding from 1 review
  • Hypnosis for children undergoing dental treatment 2010 · Cochrane All outcomes
    6 months
    A statistically significant decrease (P < 0.05) in headgear wear was observed in the control (verbal motivation) group from the first to the sixth month; the difference in the hypnosis group was not significant,…
    1 study · 30 participants
    GRADE not reported

Phosphoric etching (acid) gel vs Mechanical debridement and polishing

Plaque · Adults with dental implants and healthy peri-implant soft tissues at baseline

Phosphoric etching (acid) gel showed no clear difference in plaque compared with mechanical debridement and polishing; GRADE not reported.

1 finding from 1 review

Powered toothbrush, side-to-side action vs Circular powered toothbrush

Plaque (level reduction) · Individuals of any age with no reported disability that might affect toothbrushing (including people wearing orthodontic appliances)
1 finding from 1 review
  • Different powered toothbrushes for plaque control and gingival health 2010 · Cochrane All outcomes
    Short term (1-3 months)
    Analysis 3.1 Plaque < 3 months (Turesky): 1 trial (Yankell 1997), 64 participants; totals not selected; no significant difference between side to side and circular for plaque in the short term.
    1 study · 64 participants
    GRADE not reported

Bio-Oss (anorganic bovine bone) vs Bovine-derived xenograft (Bio-Oss) plus resorbable barrier

Augmentation (prosthesis/implant) failure · Patients receiving immediate single implants in fresh extraction sockets (maxillary anterior/premolar sites)

Bio-Oss (anorganic bovine bone) led to lower augmentation (prosthesis/implant) failure compared with bio-Oss + resorbable barrier; GRADE not reported.

1 finding from 1 review