Effect of Cervical Manipulation on Mouth Opening

Study Overview
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Brief Summary
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Objectives: To compare the effects of cervical manipulation on the ranges of motion of mouth opening and painful pressure points in the masseter and temporal muscles after of cervical manipulation compared to the control group. Material and methods: Single-blind randomized clinical trial with two arms, one group intervention and a control group. Hypothesis: There is a significant difference in mouth opening and painful pressure points between the intervention group and the control group. Expected results: The intervention group would significantly increase their mouth opening maximal and decrease pressure pain in the masseter and temporalis muscles.

Official Title
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Effect of Cervical Manipulation on Mouth Opening

Conditions
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Bruxism, Face Pain

Intervention / Treatment
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* Other: cervical manipulation
* Other: Sham intervention


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Subjects over 18 years of age, men and women Students with neck and/or facial pain minimum 3/10 VAS scale Kinesiology students who regularly attend face-to-face classes who have a mobility pass and a health declaration. · Students who read and sign the informed consent. Exclusion Criteria: Orthognathic surgery Head and neck fracture or injury Contraindication (red flag) to perform high-speed, low-amplitude cervical manipulation (bone cancer, osteoporosis, vertebral artery injury, etc.) Positive cervical safety tests (example: Klein test positive)

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Cervical manipulation group<br>high-velocity, low-amplitude cervical manipulation | Other: cervical manipulation<br>* high-velocity, low-amplitude cervical manipulation<br>|
| Sham Comparator: Control group<br>placebo manipulation, the cervical spine will be tilted and rotated without reaching the end feel or the pump | Other: Sham intervention<br>* lateral flexion and cervical rotation without manipulation<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| normal mouth opening in millimeters | With a buccal goniometer, the maximum mouth opening will be measured in millimeters. | Change from Baseline mouth open at 5 minutes | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| masseter muscle pressure points | Pain points will be measured under pressure with a pressure pain meter or algo meter. This measurement will be measured in kilograms. | Change from Baseline pain points at 5 minutes |