discuss noise at dental laboratory and office What`s a noise pollution ? How to measure N.P in office Sources of noise pollution sources of Noise pollution in dental office Side effects of noise pollution Prevention Conclusion

1. Noise pollution in dental
office
By :
Faten Mohammed ELmatuni

2. Contents
• What`s a noise pollution ?
• How to measure N.P in office
• Sources of noise pollution
• sources of Noise pollution in dental office
• Side effects of noise pollution
• Prevention
• Conclusion

3. What`s a noise pollution ?

4. How to measure sounds
Definitions:
• Intensity of sounds
• Decibel(dB_ dBA)

5. How to measure sounds
Noise Level in Decibel is measured with an
instrument called sound level meter.

6. Sources of noise pollution
• Household Sources

7. * Social Events
* Commercial and Industrial Activities
* Transportation

8. sources of Noise pollution in
dental office

9. • low speed 50,000 RPM
• High speed 250000 to
420000 rpm
• 1990( Wilson) 100Db

10. * >70 dB(A) -90 dB(A)
* The noise at the dental
laboratory(66.2db) is worse than the
dental clinic(62.2db)

11. Elmehdi 2010/Sydney
Level dBADevice
65±2Background
65±2Aspirator
87±3Compressed Air
77±3Mixers
75±2Handpiece with high speed
air suction
72±3Handpiece with low speed
air suction
84±2High Speed Drill
85±3Ultrasonic Scalar

13. Side effects of noise pollution
• Physiological effects
• psychological effects

14. Hear impairment
Physiological effects
• > 10 years, >8 working hours daily show the
highest risk. (MPDI) . (Hong Kong)
• There was a larger DP shift in the left ear than in the
right ear
• Males > females

15. • Cardiovascular Disturbances
• Headache
• Sleeping problems
• Fatigue
• High Blood Pressure

16. psychological effects
Psychoacoustics
• Sleep Disturbances
• Negative Social Behavior and Annoyance
reactions
• Impaired Task Performance
• Disturbance in Mental Health
• Insomnia
• Lack of Concentration
• dissatisfaction on the life

17. Prevention
• A noise problem generally consists of
three inter-related elements:
• the source(P2)
• the receiver
no > 85 dB(A) in 8H daily,5 days in week ,(WHO).
• the transmission path (Sound Insulation)

18. OSHA(occupational safety health
administration
In 1990 recommended that hearing protectors
must be available to all workers exposed to 8
hours noise level 85 DB or above.

19. Conclusion

20. REFERENCES
• Elmehdi, H.M. Assessing acoustic noise levels in dental clinics
and its link to dental anxiety and fear among uae population.
Compress. Air 2010, 87, 14.
• Oxford English Dictionary. Ed JA Simpson and ESC Weiner. 2nd
ed. Oxford : Clarendon Press 1989
• EPA, Documents for identifying " safe levels "on Environmental
Noise Levels
• Merrell HB, Claggett K. Noise pollution and hearing loss in
• the dental office. Dent Assist J 1992;61:6-9
• Pakistan Oral & Dental Journal Vol 35, No. 3 (September 2015)