Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

90 questions · 117 findings · 5 reviews · All outcomes

No studies found 33 · 28.2%GRADE not reported 51 · 43.6%Very low 18 · 15.4%Low 12 · 10.3%Moderate 3 · 2.6%High 0 · 0%

Experimental chewing adjuncts (bite wafers or chewing gum) vs No chewing gum, placebo, or control (no adjunct)

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · Adolescents/teenagers undergoing orthodontic treatment

Experimental chewing adjuncts (bite wafers or chewing gum) showed no clear difference in patient‐reported pain intensity or pain relief (VAS, NRS or… compared with no chewing gum, placebo, or control (no adjunct); GRADE not reported.

5 findings from 1 review
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Vibratory stimulation (vibratory adjuncts) vs No vibration or placebo vibration

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · Adolescents and adults undergoing orthodontic treatment

Vibratory stimulation (vibratory adjuncts) showed no clear difference in patient‐reported pain intensity or pain relief (VAS, NRS or… compared with no vibration or placebo vibration; GRADE not reported.

5 findings from 1 review
Show 2 more findings

Brain wave music (BWM) vs No special instructions (control)

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · Adults undergoing orthodontic treatment

Brain wave music (BWM) showed no clear difference in patient‐reported pain intensity or pain relief (VAS, NRS or… compared with no special instructions (control); GRADE not reported.

3 findings from 1 review

Psychological intervention: structured telephone call (verbal follow‐up and reassurance) vs placebo or no intervention

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)

The review found no eligible studies for this question.

1 finding from 1 review

Vibratory stimulation (vibratory adjuncts) vs No vibration or placebo vibration

Dose/intensity and frequency of pain relief needed (analgesic/rescue medication use) · Adolescents and adults undergoing orthodontic treatment

Vibratory stimulation (vibratory adjuncts) led to lower dose/intensity and frequency of pain relief needed (analgesic/rescue… compared with no vibration or placebo vibration; GRADE not reported.

1 finding from 1 review

Experimental chewing adjuncts (bite wafers or chewing gum) vs No chewing gum, placebo, or control (no adjunct)

Quality of life or patient satisfaction · Adolescents/teenagers undergoing orthodontic treatment

Experimental chewing adjuncts (bite wafers or chewing gum) led to lower quality of life or patient satisfaction compared with no chewing gum, placebo, or control (no adjunct); GRADE not reported.

1 finding from 1 review

Experimental chewing adjuncts (bite wafers or chewing gum) vs No chewing gum, placebo, or control (no adjunct)

Dose/intensity and frequency of pain relief needed (analgesic/rescue medication use) · Adolescents/teenagers undergoing orthodontic treatment
1 finding from 1 review

Amifostine vs no treatment/placebo

Dysphagia (grade >= 3, 0-4 scale) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Amifostine showed no clear difference in dysphagia (grade >= 3, 0-4 scale) compared with no treatment/placebo; GRADE not reported.

1 finding from 1 review

Chinese medicine vs no treatment/placebo

Salivary flow rate (stimulated) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Chinese medicine led to higher salivary flow rate (stimulated) compared with no treatment/placebo; GRADE not reported.

1 finding from 1 review

Pilocarpine vs no treatment/placebo

Quality of life (McMaster HNRQ, 1-7 scale) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

It is very uncertain whether pilocarpine changes quality of life (McMaster HNRQ, 1-7 scale) compared with no treatment/placebo (very low certainty).

1 finding from 1 review

Amifostine vs no treatment/placebo

Disease-free survival · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Amifostine showed no clear difference in disease-free survival compared with no treatment/placebo; GRADE not reported.

1 finding from 1 review

Amifostine vs no treatment/placebo

Quality of life · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Amifostine showed no clear difference in quality of life compared with no treatment/placebo; GRADE not reported.

1 finding from 1 review

Amifostine vs no treatment/placebo

Salivary flow rate (unstimulated) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

It is very uncertain whether amifostine changes salivary flow rate (mg/5 min, unstimulated) compared with no treatment/placebo (very low certainty).

2 findings from 1 review

Amifostine vs no treatment/placebo

Progression‐free survival · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Amifostine showed no clear difference in progression-free survival compared with no treatment/placebo; GRADE not reported.

1 finding from 1 review

Amifostine vs no treatment/placebo

Dysgeusia (grade >= 2, 0-4 scale) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Amifostine led to lower dysgeusia (grade >= 2, 0-4 scale) compared with no treatment/placebo; GRADE not reported.

1 finding from 1 review