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Dental General 82c284b8

All of the following about use of aerotor hand piece are false except:

A
The sound frequency greater than 75 decibel (dB) causes damage to the ear
B
The frequency of rotation of bur is 6000-8000rpm
C
It will harm more in elderly than very young
D
Its use in younger teeth is contraindicated.
High-Yield Explanation
No explanation provided.

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