Related Experiment Video
Updated: May 1, 2026
07:32
Author Spotlight: 3D Movement Assessment of Maxillary Posterior Teeth in Clear Aligner Treatment
Published on: February 23, 2024
2.1K
Evaluation of malocclusion in MPDS
Kvv Pratap Varma1, Raja Bhaskar Reddy2, S Nanda Kishore Reddy3
1Reader, Department of Orthodontics and Dentofacial Orthopaedics Hitech Dental College, Bhubaneswar, Odisha, India.
The Journal of Contemporary Dental Practice
|April 2, 2014
Summary
Myofascial pain dysfunction syndrome (MPDS) patients often have malocclusion. Electromyography (EMG) masseteric silent period is prolonged in MPDS, particularly in Angle
Area of Science:
- Dental Science
- Neurology
- Pain Management
Background:
- Myofascial pain dysfunction syndrome (MPDS) presents with facial pain and limited mandibular function.
- The role of malocclusion in MPDS has not been extensively evaluated.
- Electromyographic (EMG) silent period of the masseter muscle offers an objective assessment method for MPDS.
Purpose of the Study:
- To investigate the association between malocclusion and MPDS.
- To analyze the EMG masseteric silent period patterns in MPDS patients across different malocclusion types.
Main Methods:
- A study involving 150 subjects (75 normal, 75 MPDS patients).
- Subjects were classified based on Angle's malocclusion classes (I, II, III).
- Masseteric EMG silent period duration was measured bilaterally in all participants.
Main Results:
- The EMG silent period was significantly longer in MPDS patients (Group II) compared to controls (Group I).
- In MPDS patients, a significant difference in silent period duration was observed in Angle's Class II malocclusion compared to Class I and III.
- No significant gender-based differences were found in silent period durations.
Conclusions:
- MPDS patients exhibit a higher prevalence in Angle's Class I malocclusion.
- The EMG masseteric silent period is notably prolonged in Angle's Class II malocclusion within the MPDS group.
- EMG masseter silent period duration serves as a valuable adjunct for diagnosing MPDS, with measurement on one side being sufficient.
