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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. Words match anywhere in the field.

Limit to evidence status or GRADE (optional)

148 questions in 20 reviews · Periodontology

current versions
No studies 148 · 100%Ungraded 0 · 0%Very low 0 · 0%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

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
Clindamycin + SRP vs SRP
Antimicrobial resistance · Adults with aggressive periodontitis · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Doxycycline + SRP vs SRP
Percentage of bleeding on probing (BOP) · Adults with aggressive periodontitis · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Azithromycin + SRP vs SRP
Antimicrobial resistance · Adults with periodontitis (chronic and aggressive) · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Doxycycline + SRP vs SRP
Antimicrobial resistance · Adults with aggressive periodontitis · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Doxycycline + SRP vs SRP
Adverse events · Adults with aggressive periodontitis · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included study has not reported adverse eventsNRNo studies
Clindamycin + SRP vs Doxycycline + SRP
Patient-reported quality of life changes · Adults with aggressive periodontitis · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Clindamycin + SRP vs Metronidazole + SRP
Adverse events · Adults with aggressive periodontitis · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included study has not reported adverse eventsNRNo studies
Azithromycin + SRP vs SRP
Patient-reported quality of life changes · Adults with periodontitis (chronic and aggressive) · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Metronidazole + SRP vs SRP
Antimicrobial resistance · Adults with periodontitis (chronic and aggressive) · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Doxycycline + SRP vs SRP
Percentage of closed pockets · Adults with aggressive periodontitis · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Doxycycline + SRP vs Metronidazole + SRP
Percentage of closed pockets · Adults with aggressive periodontitis · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Clindamycin + SRP vs Doxycycline + SRP
Adverse events · Adults with aggressive periodontitis · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included study has not reported adverse eventsNRNo studies
Metronidazole + SRP vs SRP
Patient-reported quality of life changes · Adults with periodontitis (chronic and aggressive) · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Clindamycin + SRP vs Doxycycline + SRP
Percentage of bleeding on probing (BOP) · Adults with aggressive periodontitis · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Clindamycin + SRP vs Doxycycline + SRP
Percentage of closed pockets · Adults with aggressive periodontitis · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Tetracycline + SRP vs SRP
Percentage of bleeding on probing (BOP) · Adults with aggressive periodontitis · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Clindamycin + SRP vs Metronidazole + SRP
Percentage of bleeding on probing (BOP) · Adults with aggressive periodontitis · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Tetracycline + SRP vs SRP
Antimicrobial resistance · Adults with aggressive periodontitis · Long-term (≥ 1 year)
Adjunctive systemic antimicrobials for the non‐surgical treatment of periodontitis (2020) · Cochrane
Included studies have not reported this outcomeNRNo studies
Flossing plus toothbrushing vs Toothbrushing alone
Interproximal caries · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
No included study assessed caries as an outcome.0 studiesNo studies
Wooden cleaning stick plus toothbrushing vs Flossing plus toothbrushing
Periodontitis (probing pocket depth) · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
No included study assessed periodontitis.0 studiesNo studies
Wooden cleaning stick plus toothbrushing vs Toothbrushing alone
Gingivitis (gingival index) · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
Gingivitis measured by gingival index: Not measured.0 studiesNo studies
Oral irrigation plus toothbrushing vs Flossing plus toothbrushing
Periodontitis (probing pocket depth) · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
No included study assessed periodontitis.0 studiesNo studies
Rubber/elastomeric cleaning stick plus toothbrushing vs Flossing plus toothbrushing
Interproximal caries · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
No included study assessed caries as an outcome.0 studiesNo studies
Interdental brushing plus toothbrushing vs Toothbrushing alone
Interproximal caries · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
No included study assessed caries as an outcome.0 studiesNo studies
Rubber/elastomeric cleaning stick plus toothbrushing vs Toothbrushing alone
Harms and adverse effects · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
Harms and adverse outcomes: Not reported (neither study reported on adverse effects).0 studiesNo studies
Wooden cleaning stick plus toothbrushing vs Toothbrushing alone
Interproximal caries · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
No included study assessed caries as an outcome.0 studiesNo studies
Interdental brushing plus toothbrushing vs Flossing plus toothbrushing
Interproximal caries · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
No included study assessed caries as an outcome.0 studiesNo studies
Wooden cleaning stick plus toothbrushing vs Flossing plus toothbrushing
Gingivitis (gingival index) · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
Gingivitis measured by gingival index: Not measured.0 studiesNo studies
Wooden cleaning stick plus toothbrushing vs Flossing plus toothbrushing
Harms and adverse effects · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
Harms and adverse outcomes: Not reported (neither study reported on adverse effects).0 studiesNo studies
Rubber/elastomeric cleaning stick plus toothbrushing vs Interdental brushing plus toothbrushing
Interproximal caries · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
No included study assessed caries as an outcome.0 studiesNo studies
Wooden cleaning stick plus toothbrushing vs Toothbrushing alone
Harms and adverse effects · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
Harms and adverse outcomes: Not reported (neither study reported on adverse effects).0 studiesNo studies
Oral irrigation plus toothbrushing vs Toothbrushing alone
Interproximal caries · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
No included study assessed caries as an outcome.0 studiesNo studies
Rubber/elastomeric cleaning stick plus toothbrushing vs Toothbrushing alone
Interproximal caries · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
No included study assessed caries as an outcome.0 studiesNo studies
Wooden cleaning stick plus toothbrushing vs Toothbrushing alone
Periodontitis (probing pocket depth) · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
No included study assessed periodontitis as an outcome.0 studiesNo studies
Oral irrigation plus toothbrushing vs Flossing plus toothbrushing
Interproximal caries · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
No included study assessed caries as an outcome.0 studiesNo studies
Wooden cleaning stick plus toothbrushing vs Flossing plus toothbrushing
Interproximal caries · Adults, 16 years and older (dentate)
Home use of interdental cleaning devices, in addition to toothbrushing, for preventing and controlling… (2019) · Cochrane
No included study assessed caries as an outcome.0 studiesNo studies
Routine scale and polish provided by a dentist vs Routine scale and polish provided by a dental care professional (dental therapist or hygienist)
Plaque · Dentate adults without severe periodontitis, regularly attending for dental care in primary care (UK general dental…
Routine scale and polish for periodontal health in adults (2018) · Cochrane
no estimate extracted0 studiesNo studies
SPT using one technique or appliance for mechanical root debridement vs SPT using a different technique or appliance for mechanical root debridement
Outcome NR · Adults treated for periodontitis and receiving supportive periodontal therapy (SPT)
Supportive periodontal therapy (SPT) for maintaining the dentition in adults treated for periodontitis (2018) · Cochrane
no estimate extracted0 studiesNo studies
Routine scale and polish provided by a dentist vs Routine scale and polish provided by a dental care professional (dental therapist or hygienist)
Calculus · Dentate adults without severe periodontitis, regularly attending for dental care in primary care (UK general dental…
Routine scale and polish for periodontal health in adults (2018) · Cochrane
no estimate extracted0 studiesNo studies
Routine scale and polish provided by a dentist vs Routine scale and polish provided by a dental care professional (dental therapist or hygienist)
Oral health-related quality of life · Dentate adults without severe periodontitis, regularly attending for dental care in primary care (UK general dental…
Routine scale and polish for periodontal health in adults (2018) · Cochrane
no estimate extracted0 studiesNo studies
SPT provided at one time interval vs SPT provided at a different time interval
Outcome NR · Adults treated for periodontitis and receiving supportive periodontal therapy (SPT)
Supportive periodontal therapy (SPT) for maintaining the dentition in adults treated for periodontitis (2018) · Cochrane
no estimate extracted0 studiesNo studies
Supportive periodontal therapy (SPT) including mechanical debridement vs Monitoring only, or alternative interventions that do not include mechanical debridement
Outcome NR · Adults treated for periodontitis and receiving supportive periodontal therapy (SPT)
Supportive periodontal therapy (SPT) for maintaining the dentition in adults treated for periodontitis (2018) · Cochrane
no estimate extracted0 studiesNo studies
Autologous platelet concentrates (APC) + guided tissue regeneration (GTR) vs GTR (guided tissue regeneration) alone
Oral health-related quality of life · Patients affected by infrabony defects requiring surgical treatment, regardless of their age or gender
Autologous platelet concentrates for treating periodontal infrabony defects (2018) · Cochrane
No quantitative analysis regarding patients' quality of life was possible (no data).0 studiesNo studies
Routine scale and polish provided by a dentist vs Routine scale and polish provided by a dental care professional (dental therapist or hygienist)
Probing depth · Dentate adults without severe periodontitis, regularly attending for dental care in primary care (UK general dental…
Routine scale and polish for periodontal health in adults (2018) · Cochrane
no estimate extracted0 studiesNo studies
Planned, regular routine scale and polish (6-monthly; 12-monthly parallel) vs No scheduled scale and polish treatment
Adverse events · Dentate adults without severe periodontitis, regularly attending for dental care in primary care (UK general dental…
Routine scale and polish for periodontal health in adults (2018) · Cochrane
no estimate extracted0 studiesNo studies
SPT performed by non-specialist clinicians (general dental practitioners under specialist prescription) vs SPT performed by specialists (specialist practice)
Tooth loss · Adults treated for periodontitis and receiving supportive periodontal therapy (SPT)
Supportive periodontal therapy (SPT) for maintaining the dentition in adults treated for periodontitis (2018) · Cochrane
Not measured0 studiesNo studies
Autologous platelet concentrates (APC) + enamel matrix derivative (EMD) vs EMD (enamel matrix derivative) alone
Oral health-related quality of life · Patients affected by infrabony defects requiring surgical treatment, regardless of their age or gender
Autologous platelet concentrates for treating periodontal infrabony defects (2018) · Cochrane
No quantitative analysis regarding patients' quality of life was possible (no data).0 studiesNo studies
Autologous platelet concentrates (APC) + open flap debridement (OFD) + bone graft (BG) vs OFD + BG (open flap debridement + bone graft)
Oral health-related quality of life · Patients affected by infrabony defects requiring surgical treatment, regardless of their age or gender
Autologous platelet concentrates for treating periodontal infrabony defects (2018) · Cochrane
No quantitative analysis regarding patients' quality of life was possible (no data).0 studiesNo studies
Planned, regular routine scale and polish (6-monthly; 12-monthly parallel) vs No scheduled scale and polish treatment
Halitosis · Dentate adults without severe periodontitis, regularly attending for dental care in primary care (UK general dental…
Routine scale and polish for periodontal health in adults (2018) · Cochrane
no estimate extracted0 studiesNo studies
Routine scale and polish provided by a dentist vs Routine scale and polish provided by a dental care professional (dental therapist or hygienist)
Gingivitis · Dentate adults without severe periodontitis, regularly attending for dental care in primary care (UK general dental…
Routine scale and polish for periodontal health in adults (2018) · Cochrane
no estimate extracted0 studiesNo studies