nhs dental crown- what is it made from?

donglefan

is there a way to find out what an nhs dental crown (in situ) is made from?
the colour is metallic grey, like amalgam.

brook2jack

There are very many alloys used in NHS non precious metal crowns, it depends on the lab used. However all labs and materials are inspected ,certified and regulated to cover the legislation for medical devices.

However a typical composition may be 61% Cobalt, 27% Chromium, 6% Molybdenum, 5% Tungsten, 1% Silicon, Less than 1% Manganese, Iron, Carbon

donglefan

brook2jack, thank you for this information. One concern is that mercury is legal to be used in fillings, and I wonder if that means there is a possibility there could be mercury in a grey metal crown?

brook2jack

Mercury is used in dental amalgams worldwide and continues to be. It's use is scaling down as better materials are developed and due to environmental concerns, not health concerns. It's use over 150 years has proven it as safe as any of the alternatives.

The materials used in dental crowns have to have very different characteristics to those used in fillings. Mercury is never used in crowns.

donglefan

brook2jack, thank you for kindly advising that there is no mercury in crowns. after reading dr munro hall's book, i cannot agree that mercury is safe to have in the mouth, but regardless of that i appreciate your kind sharing of your knowledge.

Undervalued

donglefan wrote: »

brook2jack, thank you for kindly advising that there is no mercury in crowns. after reading dr munro hall's book, i cannot agree that mercury is safe to have in the mouth, but regardless of that i appreciate your kind sharing of your knowledge.

As a matter of interest, why do you feel that this doctor (and no doubt others) are correct but many other eminent specialists who say otherwise are wrong?

donglefan

Undervalued, it is because this doctor has spent so much time and effort researching the question, whereas other specialists have focussed on different aspects of dentistry.

I valued you question.

Toothsmith

And convincing people there is a problem has made him a lot of money as well as getting him into trouble now and again.

https://www.bedfordtoday.co.uk/news/dentist-escapes-being-struck-275375

brook2jack

Actually there have been decades worth of research into amalgam safety. Dentists have a vested interest in investigating as not only do most of us have amalgam fillings we work with it every day. Any problems would be seen in dentists much more than the general public.

If you read this article at the end are just a fraction of the research papers over the years. The general consensus is against Munro hall , not because he is the only one investigating but because the vast weight of research papers do not back up his claims .

https://www.quackwatch.org/01QuackeryRelatedTopics/mercury.html