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Each row is one question a systematic review asked: who, what, compared with what, and which outcome, with the effect it found and how certain that is. Every word you type has to appear somewhere in the question, and the closest matches are ranked first.

Limit to evidence status or GRADE (optional)

10,375 questions in 429 reviews · Oral Health

current versions
No studies 1,344 · 13%Ungraded 6,832 · 65.9%Very low 1,228 · 11.8%Low 613 · 5.9%Moderate 290 · 2.8%High 68 · 0.7%

Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.

QuestionEffectEvidenceStatus / GRADE
Fixed-appliance orthodontic treatment incorporating surgically assisted orthodontics (adjunctive surgical procedure: corticotomy, micro-osteoperforation or interseptal bone reduction) to increase the rate of tooth movement vs Conventional treatment: fixed-appliance orthodontic treatment without surgical assistance
Prolonged stability of treatment (adjudged using an accepted scale) · Individuals of any age receiving orthodontic treatment with fixed appliances (braces) (people requiring orthodontic…
Surgical adjunctive procedures for accelerating orthodontic treatment (2015) · Cochrane
Results: 'Our prespecified secondary outcomes of patient satisfaction, improvement in occlusion, and prolonged stability of treatment were not measured in the trials.'0 studiesNo studies
Psychological interventions vs No treatment
Adverse events · Children with a non-nutritive sucking habit (digit or pacifier)
Interventions for the cessation of non‐nutritive sucking habits in children (2015) · Cochrane
SoF (psychological interventions vs no treatment): Adverse events - insufficient information reported. Table 3 (adverse outcomes after one month; Haryett 1967), psychological treatment group: reported upset 1/11 (9%);…1 studyUngraded
Oral cryotherapy for 30 minutes vs Oral cryotherapy for 60 minutes
Oral mucositis (severe) · Adults with solid cancers receiving fluorouracil (5FU) and leucovorin
Interventions for preventing oral mucositis in patients with cancer receiving treatment: oral cryotherapy (2015) · Cochrane
RR 0.60 [0.23, 1.58]1 study · 178 participantsVery low
Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs Chlorhexidine rinse
Oral mucositis (any severity) · Adults with solid cancers receiving fluorouracil (5FU) and leucovorin
Interventions for preventing oral mucositis in patients with cancer receiving treatment: oral cryotherapy (2015) · Cochrane
RR 0.97 [0.71, 1.32]1 study · 133 participantsVery low
EGFR monoclonal antibody (cetuximab or nimotuzumab) plus standard therapy (radiotherapy or chemoradiotherapy) vs Standard therapy alone (radiotherapy or chemoradiotherapy)
Adverse effects · People with squamous cell carcinoma of the oral cavity or oropharynx · 24 to 70 months, Skin toxicity/acneiform rash (nimotuzumab, grades >=3)
Interventions for the treatment of oral and oropharyngeal cancers: targeted therapy and immunotherapy (2015) · Cochrane
RR 0.20 [0.01, 4.05]1 study · 92 participantsUngraded
Fixed-appliance orthodontic treatment incorporating surgically assisted orthodontics (adjunctive surgical procedure: corticotomy, micro-osteoperforation or interseptal bone reduction) to increase the rate of tooth movement vs Conventional treatment: fixed-appliance orthodontic treatment without surgical assistance
Rate of tooth movement (orthodontic tooth movement in mm at 3 months) · Individuals of any age receiving orthodontic treatment with fixed appliances (braces) (people requiring orthodontic… · 3 months
Surgical adjunctive procedures for accelerating orthodontic treatment (2015) · Cochrane
MD 2.03 [1.52, 2.54]2 studies · 31 participantsLow
Fluoridated milk vs Non-fluoridated milk
Antibiotics due to dental infections · General population, irrespective of age or level of risk for dental caries
Fluoridated milk for preventing dental caries (2015) · Cochrane
No evidence found. (No information was reported by the included study.)0 studiesNo studies
Preformed metal crown (fitted using the Hall Technique) vs Non-restorative caries treatment
Discomfort associated with the procedure · Children with decayed primary molar teeth · Immediately after treatment
Preformed crowns for decayed primary molar teeth (2015) · Cochrane
RR 1.67 [0.65, 4.25]1 study · 104 participantsVery low
Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs Low-dose leucovorin rinse
Oral mucositis (any severity) · Patients with osteosarcoma (bone cancer) receiving high-dose methotrexate, vincristine and leucovorin
Interventions for preventing oral mucositis in patients with cancer receiving treatment: oral cryotherapy (2015) · Cochrane
RR 0.67 [0.50, 0.90]1 study · 118 participantsVery low
Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs Low-dose leucovorin rinse
Oral mucositis (moderate to severe) · Patients with osteosarcoma (bone cancer) receiving high-dose methotrexate, vincristine and leucovorin
Interventions for preventing oral mucositis in patients with cancer receiving treatment: oral cryotherapy (2015) · Cochrane
RR 0.18 [0.01, 3.42]1 study · 118 participantsVery low
Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs Control (no treatment or standard/usual oral care, e.g. saline rinse)
Oral mucositis (moderate to severe) · All patients with cancer who are receiving treatment · High-dose melphalan-based treatment prior to HSCT (haematological cancers)
Interventions for preventing oral mucositis in patients with cancer receiving treatment: oral cryotherapy (2015) · Cochrane
RR 0.43 [0.17, 1.09]5 studies · 270 participantsLow
Psychological interventions (positive/negative reinforcement, habit reversal, DRO) vs No treatment
Sucking cessation (short term) · Children with a non-nutritive sucking habit (digit or pacifier) · Short term (less than 12 months)
Interventions for the cessation of non‐nutritive sucking habits in children (2015) · Cochrane
RR 6.16 [1.18, 32.10]2 studies · 87 participantsLow
Tyrosine kinase inhibitor (erlotinib, gefitinib or lapatinib) plus standard therapy (radiotherapy or chemoradiotherapy) vs Standard therapy alone (radiotherapy or chemoradiotherapy)
Adverse effects · People with squamous cell carcinoma of the oral cavity or oropharynx · 40 to 60 months, Mucositis (all grades)
Interventions for the treatment of oral and oropharyngeal cancers: targeted therapy and immunotherapy (2015) · Cochrane
RR 1.03 [0.94, 1.11]2 studies · 286 participantsUngraded
Micro-invasive treatment (proximal sealing or resin infiltration): resin sealant, glass ionomer sealant, polyurethane/adhesive patch, or resin infiltration vs Non-invasive measures (e.g. fluoride varnish, flossing/oral hygiene advice), no treatment, or placebo
Adverse events · Dentate children and adults with non-cavitated proximal caries lesions extending into enamel or dentine (not pulp) in… · 1 to 3 years
Micro‐invasive interventions for managing proximal dental decay in primary and permanent teeth (2015) · Cochrane
The four studies that measured adverse events reported no adverse events after micro-invasive treatment (no events in either arm)4 studiesUngraded
Fluoride gel (topically applied; operator- or self-applied; any fluoride agent/concentration; frequency at least once a year) vs Placebo or no treatment
Tooth staining · Children and adolescents aged 16 years or younger
Fluoride gels for preventing dental caries in children and adolescents (2015) · Cochrane
None of the studies reported on staining of tooth surfaces (not even Gisselsson 1999, the only trial testing stannous fluoride).0 studiesNo studies
Chlorhexidine varnish (10% and 40%) vs Placebo or no treatment
Caries increment in permanent dentition (DMFS; higher values indicate greater caries) · Children and adolescents below 18 years at study start (included studies: children from birth to 15 years), with… · 30 to 36 months, permanent dentition
Chlorhexidine treatment for the prevention of dental caries in children and adolescents (2015) · Cochrane
MD 0.53 [-0.47, 1.53]2 studies · 690 participantsVery low
Micro-invasive treatment (proximal sealing or resin infiltration): resin sealant, glass ionomer sealant, polyurethane/adhesive patch, or resin infiltration vs Non-invasive measures (e.g. fluoride varnish, flossing/oral hygiene advice), no treatment, or placebo
Caries (lesion) progression (radiographic; most sensitive measure per study, DSR > pairwise > visual scoring) · Dentate children and adults with non-cavitated proximal caries lesions extending into enamel or dentine (not pulp) in… · 12 to 36 months (radiographic follow-up)
Micro‐invasive interventions for managing proximal dental decay in primary and permanent teeth (2015) · Cochrane
OR 0.24 [0.14, 0.41]7 studies · 365 participantsModerate
Endodontic therapy (surgical or non-surgical) performed with the aid of one or more magnification devices (surgical microscope, endoscope or magnifying loupes) vs The same endodontic therapy performed without magnification devices (without visual enhancers)
Repair of root perforations · Patients of any age who received endodontic therapy and were followed up for at least 1 year after treatment
Magnification devices for endodontic therapy (2015) · Cochrane
No included study assessed this outcome; the review notes that such secondary outcomes were only sporadically reported and were never statistically assessed.NRNo studies
Fluoride gel (topically applied; operator- or self-applied; any fluoride agent/concentration; frequency at least once a year) vs Placebo or no treatment
Signs of acute toxicity during gel application (nausea, gagging, vomiting) · Children and adolescents aged 16 years or younger · During gel application
Fluoride gels for preventing dental caries in children and adolescents (2015) · Cochrane
RD 0.01 [-0.01, 0.02]2 studies · 490 participantsVery low
Micro-invasive treatment (proximal sealing or resin infiltration): resin sealant, glass ionomer sealant, polyurethane/adhesive patch, or resin infiltration vs Non-invasive measures (e.g. fluoride varnish, flossing/oral hygiene advice), no treatment, or placebo
Change in decayed, missing and filled (DMF/dmf) figures at surface, tooth and whole mouth level · Dentate children and adults with non-cavitated proximal caries lesions extending into enamel or dentine (not pulp) in…
Micro‐invasive interventions for managing proximal dental decay in primary and permanent teeth (2015) · Cochrane
No studies reported on caries measured as change in decayed, missing and filled (DMF/dmf) figures at surface, tooth or whole mouth level0 studiesNo studies
Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs Control (no treatment or standard/usual oral care, e.g. saline rinse)
Oral mucositis (any severity) · All patients with cancer who are receiving treatment · Fluorouracil (5FU) treatment for solid cancers
Interventions for preventing oral mucositis in patients with cancer receiving treatment: oral cryotherapy (2015) · Cochrane
RR 0.61 [0.52, 0.72]5 studies · 444 participantsModerate
Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs Control (no treatment or standard/usual oral care, e.g. saline rinse)
Quality of life · All patients with cancer who are receiving treatment · Fluorouracil (5FU) treatment for solid cancers
Interventions for preventing oral mucositis in patients with cancer receiving treatment: oral cryotherapy (2015) · Cochrane
Summary of findings for the main comparison (5FU solid cancers): Quality of life - 'No studies assessed this outcome'.0 studiesNo studies
Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs Chlorhexidine rinse
Oral mucositis (severe) · Adults with solid cancers receiving fluorouracil (5FU) and leucovorin
Interventions for preventing oral mucositis in patients with cancer receiving treatment: oral cryotherapy (2015) · Cochrane
RR 0.86 [0.34, 2.18]1 study · 133 participantsVery low
Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs Control (no treatment or standard/usual oral care, e.g. saline rinse)
Interruptions to cancer treatment (incidence) · All patients with cancer who are receiving treatment · High-dose melphalan-based treatment prior to HSCT (haematological cancers)
Interventions for preventing oral mucositis in patients with cancer receiving treatment: oral cryotherapy (2015) · Cochrane
Summary of findings 2 (melphalan/HSCT): Interruptions to cancer treatment - 'No studies assessed this outcome'.0 studiesNo studies
Single full-coverage metal-ceramic crown over composite core and post vs Direct adhesive composite restoration with post (conventional filling, no crown)
Periodontal health status · People with a permanent tooth that has undergone endodontic (root canal) treatment
Single crowns versus conventional fillings for the restoration of root‐filled teeth (2015) · Cochrane
No data were reported nor measured by the study. The abstract confirms no evidence was available for any secondary outcome.NRNo studies
Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs High-dose leucovorin rinse
Oral mucositis (any severity) · Patients with osteosarcoma (bone cancer) receiving high-dose methotrexate, vincristine and leucovorin
Interventions for preventing oral mucositis in patients with cancer receiving treatment: oral cryotherapy (2015) · Cochrane
RR 0.65 [0.47, 0.90]1 study · 81 participantsVery low
Tyrosine kinase inhibitor (erlotinib, gefitinib or lapatinib) plus standard therapy (radiotherapy or chemoradiotherapy) vs Standard therapy alone (radiotherapy or chemoradiotherapy)
Disease-free survival · People with squamous cell carcinoma of the oral cavity or oropharynx · 40 to 60 months, Gefitinib + radiotherapy (oral cavity)
Interventions for the treatment of oral and oropharyngeal cancers: targeted therapy and immunotherapy (2015) · Cochrane
HR 1.51 [0.61, 3.71]1 study · 60 participantsVery low
Fluoride gel (topically applied; operator- or self-applied; any fluoride agent/concentration; frequency at least once a year) vs Placebo or no treatment
Proportion of children developing new caries · Children and adolescents aged 16 years or younger (permanent dentition)
Fluoride gels for preventing dental caries in children and adolescents (2015) · Cochrane
RR 0.82 [0.68, 0.99]1 study · 280 participantsUngraded
Single full-coverage metal-ceramic crown over composite core and post vs Direct adhesive composite restoration with post (conventional filling, no crown)
Non-catastrophic failure of the post · People with a permanent tooth that has undergone endodontic (root canal) treatment · 3 years
Single crowns versus conventional fillings for the restoration of root‐filled teeth (2015) · Cochrane
RR 1.96 [0.18, 21.01]1 study · 117 participantsVery low
EGFR monoclonal antibody (cetuximab or nimotuzumab) plus standard therapy (radiotherapy or chemoradiotherapy) vs Standard therapy alone (radiotherapy or chemoradiotherapy)
Adverse effects · People with squamous cell carcinoma of the oral cavity or oropharynx · 24 to 70 months, Skin toxicity/acneiform rash (nimotuzumab, all grades)
Interventions for the treatment of oral and oropharyngeal cancers: targeted therapy and immunotherapy (2015) · Cochrane
RR 1.06 [0.85, 1.31]1 study · 92 participantsUngraded
Orthodontic appliances (palatal crib) vs No treatment
Occlusion (change in mandibular arch length, short term) · Children with a non-nutritive sucking habit (digit or pacifier) · Short term (3 months)
Interventions for the cessation of non‐nutritive sucking habits in children (2015) · Cochrane
Table 1 (reduction in malocclusion), Villa 1997 (n=24), palatal crib vs no treatment: change in mandibular arch length (mm) - no treatment 0.03 (SD 0.19); palatal crib -1.2 (SD 0.8); reported as statistically…1 study · 24 participantsUngraded
Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs Chlorhexidine rinse
Oral mucositis (moderate to severe) · Adults with solid cancers receiving fluorouracil (5FU) and leucovorin
Interventions for preventing oral mucositis in patients with cancer receiving treatment: oral cryotherapy (2015) · Cochrane
RR 0.89 [0.51, 1.56]1 study · 133 participantsVery low
Single full-coverage metal-ceramic crown over composite core and post vs Direct adhesive composite restoration with post (conventional filling, no crown)
Incidence or recurrence of caries (assessed clinically or by radiographs) · People with a permanent tooth that has undergone endodontic (root canal) treatment
Single crowns versus conventional fillings for the restoration of root‐filled teeth (2015) · Cochrane
No data were reported nor measured by the study. The abstract confirms no evidence was available for any secondary outcome.NRNo studies
EGFR monoclonal antibody (cetuximab or nimotuzumab) plus standard therapy (radiotherapy or chemoradiotherapy) vs Standard therapy alone (radiotherapy or chemoradiotherapy)
Adverse effects · People with squamous cell carcinoma of the oral cavity or oropharynx · 24 to 70 months, Dysphagia (all grades)
Interventions for the treatment of oral and oropharyngeal cancers: targeted therapy and immunotherapy (2015) · Cochrane
RR 0.97 [0.92, 1.03]3 studies · 1403 participantsUngraded
Tyrosine kinase inhibitor (erlotinib, gefitinib or lapatinib) plus standard therapy (radiotherapy or chemoradiotherapy) vs Standard therapy alone (radiotherapy or chemoradiotherapy)
Locoregional control · People with squamous cell carcinoma of the oral cavity or oropharynx · 40 to 60 months
Interventions for the treatment of oral and oropharyngeal cancers: targeted therapy and immunotherapy (2015) · Cochrane
HR 0.89 [0.53, 1.49]2 studies · 271 participantsVery low
Breastfeeding vs Bottle feeding
Presence of dental caries · Children with exclusively primary dentition (age ≤71 months)
Breast and Bottle Feeding as Risk Factors for Dental Caries: A Systematic Review and Meta-Analysis. (2015)
OR 0.43 [0.23, 0.80]2 studies · 620 participantsUngraded
Micro-invasive treatment (proximal sealing or resin infiltration): resin sealant, glass ionomer sealant, polyurethane/adhesive patch, or resin infiltration vs Non-invasive measures (e.g. fluoride varnish, flossing/oral hygiene advice), no treatment, or placebo
Caries (lesion) progression measured by digital subtraction radiography (DSR) · Dentate children and adults with non-cavitated proximal caries lesions extending into enamel or dentine (not pulp) in… · 12 to 18 months (radiographic follow-up)
Micro‐invasive interventions for managing proximal dental decay in primary and permanent teeth (2015) · Cochrane
OR 0.18 [0.06, 0.50]3 studiesModerate
Micro-invasive treatment (proximal sealing or resin infiltration): resin sealant, glass ionomer sealant, polyurethane/adhesive patch, or resin infiltration vs Non-invasive measures (e.g. fluoride varnish, flossing/oral hygiene advice), no treatment, or placebo
Caries (lesion) progression measured by radiographic scoring · Dentate children and adults with non-cavitated proximal caries lesions extending into enamel or dentine (not pulp) in… · 12 to 30 months (radiographic follow-up)
Micro‐invasive interventions for managing proximal dental decay in primary and permanent teeth (2015) · Cochrane
OR 0.27 [0.17, 0.44]5 studiesModerate
Psychological intervention + orthodontic treatment (palatal crib or palatal arch) vs No treatment
Sucking cessation (short term) · Children with a non-nutritive sucking habit (digit or pacifier) · Short term (less than 12 months)
Interventions for the cessation of non‐nutritive sucking habits in children (2015) · Cochrane
RR 6.36 [0.97, 41.96]1 study · 32 participantsUngraded
Cessation of water fluoridation (fluoride removed from the water supply) vs Continued fluoridated water
Caries in deciduous teeth (dmft/dmfs) · People of all ages in a previously fluoridated community (Maupome 2001: children with generally low caries experience)
Water fluoridation for the prevention of dental caries (2015) · Cochrane
No evidence to determine the effect of the cessation of water fluoridation on caries in deciduous teeth. No included study reported change in dmft following cessation.0 studiesNo studies
Higher water fluoride concentration (fluoridated water; natural or artificial) vs Lower water fluoride concentration (concurrent control)
Dental fluorosis of any level (all severities) · Populations of all ages (mostly children) exposed to drinking water with differing fluoride concentrations · Cross-sectional
Water fluoridation for the prevention of dental caries (2015) · Cochrane
OR 3.60 [2.86, 4.53]90 studies · 180530 participantsLow
Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs Control (no treatment or standard/usual oral care, e.g. saline rinse)
Oral mucositis (any severity) · All patients with cancer who are receiving treatment · Low-dose methotrexate for GVHD prophylaxis after allogeneic HSCT
Interventions for preventing oral mucositis in patients with cancer receiving treatment: oral cryotherapy (2015) · Cochrane
RR 0.98 [0.90, 1.07]1 study · 122 participantsVery low
Non-specific immunotherapy (recombinant interleukin-2 or BCG cell wall preparation) plus standard therapy vs Standard therapy alone
Adverse effects · People with squamous cell carcinoma of the oral cavity or oropharynx · 24 to 70 months, Stomatitis (rIL-2, all grades)
Interventions for the treatment of oral and oropharyngeal cancers: targeted therapy and immunotherapy (2015) · Cochrane
RR 1.47 [0.75, 2.90]1 study · 30 participantsUngraded
Fixed-appliance orthodontic treatment incorporating surgically assisted orthodontics (adjunctive surgical procedure: corticotomy, micro-osteoperforation or interseptal bone reduction) to increase the rate of tooth movement vs Conventional treatment: fixed-appliance orthodontic treatment without surgical assistance
Harms arising during orthodontic treatment (gingival and periodontal problems, anchorage loss and iatrogenic damage to teeth e.g. caries/decalcification, root resorption); only periodontal/gingival health assessed · Individuals of any age receiving orthodontic treatment with fixed appliances (braces) (people requiring orthodontic… · Up to 4 months
Surgical adjunctive procedures for accelerating orthodontic treatment (2015) · Cochrane
SoF: Assumed risk 'See comment'; Corresponding risk 'See comment'; 13 (1 study, split‐mouth); Quality ⊕⊖⊖⊖ very low. Comment: 'Gingival and periodonal problems only were assesed in 1 study (Aboul‐Ela 2011). No precise…1 study · 13 participantsVery low
Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs High-dose leucovorin rinse
Oral mucositis (moderate to severe) · Patients with osteosarcoma (bone cancer) receiving high-dose methotrexate, vincristine and leucovorin
Interventions for preventing oral mucositis in patients with cancer receiving treatment: oral cryotherapy (2015) · Cochrane
Oral mucositis (moderate to severe). Not estimable - no participants had developed moderate or severe oral mucositis by the fourth day after chemotherapy when the data were reported (Zhang 2011, Analysis 4.2, subgroup…1 study · 81 participantsUngraded
Chlorhexidine spray vs Placebo or no intervention (including routine care)
Outcome NR · Children and adolescents below 18 years at study start (included studies: children from birth to 15 years), with…
Chlorhexidine treatment for the prevention of dental caries in children and adolescents (2015) · Cochrane
There were no trials on other products containing chlorhexidine such as sprays, toothpastes, chewing gums or mouthrinses.0 studiesNo studies
Chlorhexidine toothpaste vs Placebo or no intervention (including routine care)
Outcome NR · Children and adolescents below 18 years at study start (included studies: children from birth to 15 years), with…
Chlorhexidine treatment for the prevention of dental caries in children and adolescents (2015) · Cochrane
There were no trials on other products containing chlorhexidine such as sprays, toothpastes, chewing gums or mouthrinses.0 studiesNo studies
Endodontic therapy performed with one type of magnification device (surgical microscope, endoscope or magnifying loupes) vs Endodontic therapy performed with a different type of magnification device
Repair of root perforations · Patients of any age who received endodontic therapy and were followed up for at least 1 year after treatment
Magnification devices for endodontic therapy (2015) · Cochrane
No included study assessed this outcome; the review notes that such secondary outcomes were only sporadically reported and were never statistically assessed.NRNo studies
Preformed crown (any material; conventional technique or Hall Technique) vs Filling (any material; with or without complete carious tissue excavation; with or without pulp treatment)
Major failure · Children with decayed primary molar teeth · Long term (12 months to 48 months)
Preformed crowns for decayed primary molar teeth (2015) · Cochrane
RR 0.18 [0.06, 0.56]3 studies · 346 participantsModerate
Endodontic therapy (surgical or non-surgical) performed with the aid of one or more magnification devices (surgical microscope, endoscope or magnifying loupes) vs The same endodontic therapy performed without magnification devices (without visual enhancers)
Quality of visualisation of root canal anatomy and morphology · Patients of any age who received endodontic therapy and were followed up for at least 1 year after treatment
Magnification devices for endodontic therapy (2015) · Cochrane
No included study assessed this outcome; the review notes that such secondary outcomes were only sporadically reported and were never statistically assessed.NRNo studies