What do systematic reviews say?

Surgical removal (extraction) of asymptomatic disease-free impacted wisdom teeth vs Retention (conservative management) of asymptomatic disease-free impacted wisdom teeth

The review found no eligible studies for this question.

• Surgical removal versus retention for the management of asymptomatic disease‐free impacted wisdom teeth 2020 · Cochrane All outcomes
  Health-related quality of life: Our primary outcome was not assessed in the included studies.
  0 studies
  No studies found

Zinc vs placebo

• Interventions for managing taste disturbances 2017 · Cochrane All outcomes
  Results (health-related quality of life): None of the studies reported data on health-related quality of life. Heckmann 2005 (zinc) reported that signs of depression were less severe (Beck Depression Inventory P<0.05;…
  1 study
  GRADE not reported

Acupuncture vs sham control

• Interventions for managing taste disturbances 2017 · Cochrane All outcomes
  Results (health-related quality of life): Brandt 2008 assessed HRQoL in dysgeusia patients and reported significant improvement in psychological symptoms in the acupuncture group and increased quality of life in both…
  1 study
  GRADE not reported

Clinical examination with 24-month recall vs Clinical examination with 12-month recall

The review found no eligible studies for this question.

• Recall intervals for oral health in primary care patients 2020 · Cochrane All outcomes

  2 years
  Summary of findings 1 lists 'Oral-health-related quality of life: Not reported' for the 24-month versus 12-month comparison (Wang 1992 did not measure it).
  0 studies
  No studies found

Routine scale and polish provided by a dentist vs Routine scale and polish provided by a dental care professional (dental therapist or hygienist)

The review found no eligible studies for this question.

• Routine scale and polish for periodontal health in adults 2018 · Cochrane All outcomes
  no estimate extracted
  0 studies
  No studies found

14% HP strip vs placebo

• Home‐based chemically‐induced whitening (bleaching) of teeth in adults 2018 · Cochrane All outcomes
  No significant impact of tooth whitening on OHRQoL (Bruhn 2012; Wong 2004)
  2 studies
  GRADE not reported

Autologous platelet concentrates (APC) + guided tissue regeneration (GTR) vs GTR (guided tissue regeneration) alone

The review found no eligible studies for this question.

• Autologous platelet concentrates for treating periodontal infrabony defects 2018 · Cochrane All outcomes
  No quantitative analysis regarding patients' quality of life was possible (no data).
  0 studies
  No studies found

Autologous platelet concentrates (APC) + enamel matrix derivative (EMD) vs EMD (enamel matrix derivative) alone

The review found no eligible studies for this question.

• Autologous platelet concentrates for treating periodontal infrabony defects 2018 · Cochrane All outcomes
  No quantitative analysis regarding patients' quality of life was possible (no data).
  0 studies
  No studies found

Autologous platelet concentrates (APC) + open flap debridement (OFD) + bone graft (BG) vs OFD + BG (open flap debridement + bone graft)

The review found no eligible studies for this question.

• Autologous platelet concentrates for treating periodontal infrabony defects 2018 · Cochrane All outcomes
  No quantitative analysis regarding patients' quality of life was possible (no data).
  0 studies
  No studies found

Autologous platelet concentrates (APC) + open flap debridement (OFD) vs Open flap debridement (access flap surgery)

The review found no eligible studies for this question.

• Autologous platelet concentrates for treating periodontal infrabony defects 2018 · Cochrane All outcomes
  No quantitative analysis regarding patients' quality of life was possible (no data).
  0 studies
  No studies found

Educational intervention with information and practical components (theoretical oral health education plus practical skills training) for nursing staff and/or residents vs (Optimised) usual care

The review found no eligible studies for this question.

• Oral health educational interventions for nursing home staff and residents 2016 · Cochrane All outcomes
  SoF row 'Oral health-related quality of life': Illustrative risks -, relative effect -, participants/studies -, quality -; Comment: Outcome not reported. Not measured in any included study.
  0 studies
  No studies found

Light vibrational forces (LVF) vs Conventional orthodontic appliance treatment

• Non‐surgical adjunctive interventions for accelerating tooth movement in patients undergoing orthodontic treatment 2023 · Cochrane All outcomes
  Katchooi 2018 (unclear risk of bias): light vibrational forces had no statistically significant (P>0.05) effect on OHRQoL when used with orthodontic aligners.
  1 study · 27 participants
  GRADE not reported

Clinical examination with 24-month recall vs Clinical examination with 6-month recall

Clinical examination with 24-month recall showed no clear difference in oral-health-related quality of life (OHIP-14) compared with clinical examination with 6-month recall (high certainty).

• Recall intervals for oral health in primary care patients 2020 · Cochrane All outcomes

  4 years
  MD -0.24 [-1.55, 1.07]
  1 study · 305 participants
  High

Clinical examination with risk-based recall vs Clinical examination with 24-month recall

Clinical examination with risk-based recall showed no clear difference in oral-health-related quality of life (OHIP-14) compared with clinical examination with 24-month recall (high certainty).

• Recall intervals for oral health in primary care patients 2020 · Cochrane All outcomes

  4 years
  MD -0.37 [-1.69, 0.95]
  1 study · 298 participants
  High

Clinical examination with risk-based recall vs Clinical examination with 6-month recall

Clinical examination with risk-based recall showed no clear difference in oral-health-related quality of life (OHIP-14) compared with clinical examination with 6-month recall (high certainty).

• Recall intervals for oral health in primary care patients 2020 · Cochrane All outcomes

  4 years
  MD -0.35 [-1.02, 0.32]
  1 study · 1551 participants
  High

Routine scale and polish every 6 months vs Routine scale and polish every 12 months

Routine scale and polish every 6 months showed no clear difference in oral health-related quality of life (OHIP-14) compared with routine scale and polish every 12 months (high certainty).

• Routine scale and polish for periodontal health in adults 2018 · Cochrane All outcomes

  36 months
  MD -0.40 [-1.34, 0.54]
  1 study · 786 participants
  High

Routine scale and polish at a fixed interval vs No scheduled scale and polish treatment

Planned, regular routine scale and polish (6-monthly; 12-monthly… showed no clear difference in oral health-related quality of life (OHIP-14) compared with no scheduled scale and polish treatment (high certainty).

• Routine scale and polish for periodontal health in adults 2018 · Cochrane All outcomes

  36 months · 6-monthly (12-monthly parallel)
  MD -0.30 [-1.24, 0.64]
  1 study · 795 participants
  High

Altered-cast impression technique (ACIP), polyether vs One-piece cast technique (OPC), polyether

The review found no eligible studies for this question.

• Final‐impression techniques and materials for making complete and removable partial dentures 2018 · Cochrane All outcomes
  Not measured
  0 studies
  No studies found

Wax (fluid wax), two stage-two step selective pressure final impression vs Polysulfide rubber (elastomer)

The review found no eligible studies for this question.

• Final‐impression techniques and materials for making complete and removable partial dentures 2018 · Cochrane All outcomes
  Not measured
  0 studies
  No studies found

Biofunctional Prosthetic System (BPS): closed-mouth two stage-two step final impression with addition silicone elastomer vs Conventional complete denture technique (CCD): open-mouth two stage-two step conventional technique using elastomer

• Final‐impression techniques and materials for making complete and removable partial dentures 2018 · Cochrane All outcomes

  3 months
  OHIP-EDENT median scores: BPS 34.5; CCD 35.8. No clear difference between groups
  1 study · 10 participants
  Very low