On 16/01/2019 21:35, newshound wrote:


It would be asking too much for Which to descend to that level of
technical detail. But yes, I suppose that could be it. Our local dental
practice now has both a "mechanical" and an "ultrasonic" hygenist.

That is for cleaning teeth in a different way to brushing. It is often
to remove material that brushing alone cannot do.

Brushing and flossing can be regarded as a preventative process but with
a hygienist the work undertaken is often remedial such as tartar removal.



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