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Finger receptor dysfunction in dental technicians exposed to high-frequency vibration
U Hjortsberg1, I Rosén, P Orbaek
1Department of Occupational Medicine, Malmö General Hospital, Sweden.
Scandinavian Journal of Work, Environment & Health
|October 1, 1989
Summary
High-frequency vibration exposure in dental technicians may impair digital nerve function, affecting both myelinated and unmyelinated nerve fibers. This study suggests potential distal nerve dysfunction in the hands of these professionals.
Area of Science:
- Occupational Health
- Neuroscience
- Biomedical Engineering
Background:
- High-frequency vibration is common in certain professions, such as dentistry.
- Potential neurological effects of occupational vibration exposure require thorough investigation.
Purpose of the Study:
- To investigate the impact of high-frequency vibration (up to 40 kHz) on digital nerve function in dental technicians.
- To compare nerve function parameters between dental technicians and an age-matched control group.
Main Methods:
- Nerve conduction velocities and fractionated antidromic measurements were assessed.
- Distal response latency to mechanical and electrical stimuli in the median nerve was measured.
- Vibration warming and cooling thresholds were evaluated.
Main Results:
- No significant differences in nerve conduction velocities were found between groups.
- Dental technicians showed slightly higher response latency to distal median nerve stimulation.
- Significantly increased vibration warming and cooling thresholds indicated damage to both myelinated and unmyelinated nerve fibers in exposed subjects.
Conclusions:
- High-frequency vibration exposure may lead to distal nerve or receptor dysfunction.
- Damage to both myelinated and unmyelinated nerve fibers in the fingers is associated with occupational high-frequency vibration.
- Further research is warranted to understand the long-term implications for dental professionals.