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Evidence found and GRADE certainty

779 questions · 866 findings · 43 reviews · Oral and maxillofacial surgery

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No studies found 188 · 21.7%GRADE not reported 548 · 63.3%Very low 81 · 9.4%Low 37 · 4.3%Moderate 8 · 0.9%High 4 · 0.5%

Occlusal splint vs acupuncture

Participant satisfaction or quality of life · People with temporomandibular disorders (TMD)

Occlusal splint showed no clear difference in participant satisfaction or quality of life compared with acupuncture; GRADE not reported.

1 finding from 1 review

Occlusal splint vs Physical therapy (ultrasound, exercise, sensorimotor training, laser, TENS, manual therapy)

Muscle pain when chewing · People with temporomandibular disorders (TMD)

It is very uncertain whether occlusal splint changes muscle pain when chewing compared with physical therapy (ultrasound, exercise, sensorimotor training,… (very low certainty).

1 finding from 1 review

Cleft lip and/or palate (CL/P) vs No cleft lip and/or palate (non-CL/P)

Lactobacillus spp. mean levels/counts · Children and adolescents aged 0-18 years with non-syndromic cleft lip and palate (CLP)

No significant difference in Lactobacillus spp. presence was reported; GRADE was not reported.

1 finding from 1 review

M2 Demirjian stages F-G vs M2 Demirjian stages E-D

Spontaneous space closure · Children and adolescents with maxillary permanent first molar extraction

In the maxilla, M2 Demirjian stages F-G were not associated with a statistically significant difference in space closure odds.

1 finding from 1 review

Occlusal splint vs Physical therapy (ultrasound, exercise, sensorimotor training, laser, TENS, manual therapy)

Joint pain at rest · People with temporomandibular disorders (TMD)

It is very uncertain whether occlusal splint changes joint pain at rest compared with physical therapy (ultrasound, exercise, sensorimotor training,… (very low certainty).

1 finding from 1 review

Second molar at Demirjian stage E-F at extraction vs Second molar at Demirjian stage G-H at extraction

Spontaneous space closure · Children and adolescents after extraction of a mandibular permanent first molar (before eruption of the second molar)

In the mandible, Demirjian stage E-F vs G-H was not significantly associated with space closure (OR 4.44; not GRADE-rated).

1 finding from 1 review

Second molar at Demirjian stage A-D at extraction vs Second molar at Demirjian stage F-H at extraction

Spontaneous space closure · Children and adolescents after extraction of a mandibular permanent first molar (before eruption of the second molar)

In the mandible, earlier Demirjian stage A-D (vs F-H) increases odds of space closure (OR 3.11; low certainty).

1 finding from 1 review

Second molar mesially inclined at extraction vs Second molar upright at extraction

Spontaneous space closure · Children and adolescents after extraction of a mandibular permanent first molar (before eruption of the second molar)

In the mandible, mesial inclination of the second molar vs upright was not significantly associated with space closure (OR 0.68; not GRADE-rated).

1 finding from 1 review

Occlusal splint vs No treatment or placebo (non-occlusal or transparent-foil placebo splint)

Frequency of joint noise · People with temporomandibular disorders (TMD)

It is very uncertain whether occlusal splint changes frequency of joint noise compared with no treatment or placebo (non-occlusal or transparent-foil placebo… (very low certainty).

1 finding from 1 review

Occlusal splint vs Another occlusal splint with a different mechanism of action

Range of mandibular motion · People with temporomandibular disorders (TMD)

Occlusal splint showed no clear difference in range of mandibular motion compared with another occlusal splint with a different mechanism of action; GRADE not reported.

1 finding from 1 review

Occlusal splint vs No treatment or placebo (non-occlusal or transparent-foil placebo splint)

Range of mandibular motion · People with temporomandibular disorders (TMD)

Occlusal splint showed no clear difference in range of mandibular motion compared with no treatment or placebo (non-occlusal or transparent-foil placebo…; GRADE not reported.

1 finding from 1 review

Occlusal splint vs Physical therapy (ultrasound, exercise, sensorimotor training, laser, TENS, manual therapy)

Frequency of joint noise · People with temporomandibular disorders (TMD)

It is very uncertain whether occlusal splint changes frequency of joint noise compared with physical therapy (ultrasound, exercise, sensorimotor training,… (very low certainty).

1 finding from 1 review

Extraction at patient age <8 years vs Extraction at patient age >10 years

Spontaneous space closure · Children and adolescents after extraction of a mandibular permanent first molar (before eruption of the second molar)

In the mandible, extraction before age 8 (vs after 10) increases odds of space closure (OR 5.01; low certainty).

1 finding from 1 review

Occlusal splint vs Behavioural therapy (counselling, CBT, relaxation, self-care management)

Range of mandibular motion · People with temporomandibular disorders (TMD)

Occlusal splint showed no clear difference in range of mandibular motion compared with behavioural therapy (counselling, CBT, relaxation, self-care…; GRADE not reported.

1 finding from 1 review

Age 8-10 years vs Extraction at patient age >10 years

Spontaneous space closure · Children and adolescents after extraction of a mandibular permanent first molar (before eruption of the second molar)

In the mandible, extraction at age 8-10 (vs after 10) increases odds of space closure (OR 3.32; low certainty).

1 finding from 1 review