What do systematic reviews say?

Change in feeling of dryness · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

Patient satisfaction · Children and adolescents aged up to 17 years having dental treatment (orthodontic treatment, fillings, pulp treatment, or tooth…

Outcome not reported · Patients with full arch fixed orthodontic appliances with bands attached to molars (patients with cleft lip/palate or other craniofacial…

Improvement on sagittal relationship between the maxilla and mandible (cephalometric data) · Children with obstructive sleep apnoea (aged 15 years or younger)

Outcome not reported · People with a diagnosis of oral leukoplakia

Secondary caries · Adults and adolescents with permanent posterior molar and premolar teeth suitable for Class I and II, but excluding Class V, amalgam…

Adverse effects · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

Healing of osteonecrosis - improvement ('healed' or 'improved' vs 'unchanged' or 'worse') · People of any age and either sex, in any setting, with BRONJ; bisphosphonate exposure past or current; includes people with cancer and…

Change in feeling of dryness · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

Change in taste · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

Change in feeling of dryness · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · People undergoing orthodontic treatment (any age; 9 to 34 years in included studies)

Oral health-related quality of life · Nursing home residents (mean age 78.3 to 86.0 years; more than 66% women; 62.1% to 87.3% with dental prostheses)

Proportion of children not remaining caries-free · Children and adolescents aged 16 years or less

Change in taste · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

Changes of the width between cuspids and first molars (plaster models) · Children with obstructive sleep apnoea (aged 15 years or younger)

Oral health: Not having seen a dentist in the past year · People with serious mental illness (all included participants had schizophrenia); majority aged 18 to 65 years per NIMH 1987, or with…

Cost of the intervention · People with a permanent tooth that has undergone endodontic (root canal) treatment

Dental caries in adults · adults

Outcome not reported · Children and adolescents below 18 years at study start (included studies: children from birth to 15 years), with mixed, permanent or…