[ RadSafe ] From the UK Dental X-ray machine radiation danger alert
fd003f0606 at blueyonder.co.uk
Mon Dec 3 09:16:13 CST 2012
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Fred BY
Sent: 03 December 2012 15:07
To: radsafe at health.phys.iit.edu
Subject: [ RadSafe ] From the UK Dental X-ray machine radiation danger alert
"Dentists have been warned against using a hand-held X-ray machine on
patients as it poses a significant health risk.
The cheap imported machine, known as the Tianjie Dental Falcon, exposes
users and patients to 10 times the normal level of radiation, increasing
their risks of cancer and organ damage.
The Medicines and Healthcare Regulatory Agency is asking NHS and private
dentists to dispose of these devices.
It is not known how many patients may have been put at risk.
So far, 13 of the machines - sold on internet sites including eBay by a
Chinese manufacturer - have been seized at a distribution centre.
At least one dental surgery has been found using the device.
Emergency testing of the product by the Health Protection Agency and
scientists at King's College Hospital in London revealed that it has
insufficient lead shielding inside it to protect dentists and patients from
The machine's X-ray beam is also too wide, which means a patient's whole
skull and brain is exposed to radiation rather than just their mouth.
And the device poses an electrical hazard because it comes with a European
plug and a travel adapter that are not earthed or fused for the UK mains
supply. As well as being a fire hazard, it could cause a serious electric
shock (50,000 volts) to the dentist or patients.
Scientist Donald Emerton, who tested the device, said: "Over time someone
operating this machine, such as a dental assistant, would be exposed to
unacceptable levels of accumulated radiation and this would have an
increased risk to their health.
"I certainly wouldn't want someone to use this piece of equipment to take an
X-ray of me."
The MHRA believes it has shut down the UK's only distributor but says
investigations are ongoing to ensure no more can be sold and used here. The
problem first came to light in June 2012.
It is not yet known how many of the devices are already in circulation.
The manufacturer - Lin Lin Zhengzhou Tianjie Electronic Equipment Co - is
currently unavailable to contact.
The Tianjie Dental Falcon was priced at about £200, a fraction of the cost
of other dental hand-held X-ray sets available for sale in the UK, which can
be over £4,000.
Bruce Petrie, of the MHRA's Medical Devices Enforcement Team, said: "It's
vital that dentists and dental staff do not buy these dental X-ray machines
from eBay or other websites because they are not approved and not safe for
dentists or patients.
"We are working with eBay and other governments to ensure dentists and
patients are protected."
He said anyone who had bought one of these machines should the MHRA's
hotline on 020 3080 6701 or at counterfeit at mhra.gsi.gov.uk
Barry Cockcroft, chief dental officer for England said: "It is vitally
important that when buying equipment, dentists make sure it is appropriate
and safe for use.
"I would urge all dental professionals to be cautious of seemingly cheap
devices which may not be fit for purpose and potentially dangerous."
Richard Paynter, deputy director of the Health Protection Agency's Centre
for Radiation, Chemical and Environmental Hazards, said: "We're delighted
that MHRA is now taking such positive steps to ensure public and
occupational protection from unnecessary radiation exposure."
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