I think that dental hygienists should have electric tooth scrapers that cauterize the gums as they go. A little more pain, perhaps, but much less blood.
They don't that, but there is an alternative to the various metal scrapers: They have ultrasonic descalers now... but they have a lot of side-effects that may not be worth having clean teeth:
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branchandroot
no subject
Date: 2006-05-26 12:58 am (UTC)http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3279684&dopt=Abstract
I still get the old iron hook. Works for me for now.