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Electromyographic relaxed mandibular position in long-faced subjects
The Journal of Prosthetic Dentistry
|October 1, 1985
Summary
Long-faced individuals exhibit larger muscle activity at rest, challenging current clinical practices. This study clarifies conflicting research on electromyography (EMG) rest position and craniofacial morphology.
Area of Science:
- Dentistry
- Biomedical Engineering
- Physiology
Background:
- Conflicting research exists regarding electromyography (EMG) rest position and craniofacial morphology.
- Previous studies have yielded inconsistent results on the relationship between EMG activity at rest and facial structure.
- The clinical utility of EMG rest position for determining vertical dimension of occlusion is debated.
Purpose of the Study:
- To investigate the relationship between EMG rest position and craniofacial morphology in long-faced subjects.
- To resolve discrepancies in previous research concerning EMG rest position and facial types.
- To evaluate the clinical relevance of EMG rest position in establishing vertical dimension of occlusion.
Main Methods:
- Focused on subjects with long-faced craniofacial morphology.
- Controlled for head position during measurements.
- Measured electromyography (EMG) rest position.
Main Results:
- Long-faced subjects demonstrated significantly larger EMG rest positions.
- Controlling head position did not reconcile conflicting findings with prior studies.
- Inconsistencies in sample populations did not explain previous discrepancies.
Conclusions:
- Long-faced individuals have distinct EMG rest positions.
- The findings challenge the routine clinical use of EMG rest position for establishing vertical dimension of occlusion.
- Further research is needed to clarify the role of EMG in dental occlusion determination.