GOOD or BAD? some dentures radioactive?

[Kerembaev@cs.com]

Greetings,

I just have some time so why not to ask around?

Disclaimer:
Not to be taken too serious.

1. It has a slight possibility of bringing the old discussion about low dose 
effects. 
Not saying that, may be it is GOOD to have those dentures....from the 
dentistry point of view?
Looking on all those TV commercials and constant dentist's reminds of tooth 
hygiene; bacteria's in the teeth.
Seems, those dentures can are good ... disinfects?? Sort of portable personal 
food irradiators. I heard that gold, silver and platinum dentures are used 
not only for durability and in some countries as an income level indicator, 
also for the hygiene reason
Of course, the dose rate should be higher...
I am not an epidemiologist, but I am wondering what would be the balance of 
harms and benefits or, if low dose effects are beneficial, there are all 
benefits. (patented idea?)

2. 
Had those dentures caused decrease in the quality of dental x-ray films?   
1500/ (365.25 x 24 ) = 0.17 mrem/hr, probably much less than x-ray dose rate 
during the exam???
I do not have dental exposure data.
What is the waiting factor for the....teeth? or we need to use the head as an 
organ 

3.
Does EDE calculations from the x-ray exams used the Wt for the head as an 
organ or teeth? Do teeth have their own "unlisted" Wt?
If so how does it go with the Regs? Oh yes, I forgot that that medical use of 
radiation is regulating in the different fashion.

4. I am, as well Wes, also, interested how were 1500 mrem/yr calculated.
Was it measured thru exposure rate or put TLD on stack of dentures?
If so, what Wt (head or teeth) did s/he use???  to get EDE 
I can imagine that if there Wt for teeth it must be very low.

5.
Well, this one is on the border... 
Could be dose from dentures considered as contributors to TEDE as CDE with 
biological half life equals to half of the difference between national 
average length of life and the patient's age? 

6. Beyond the border almost like a million dollars question.
If 5. is TRUE. Are those, two different way calculated TEDEs, the same?

Just some thoughts on personal leisure time.

Emil.
kerembaev@cs.com

"Good morning, good afternoon, and if I wont see today you again, good 
evening"
"The Truman Show"



< Bjorn Cedervall wrote:
 > A full set of porcelain dentures releases about 1,500 millirems of
 > radiation in a year, which is about four times the natural background
 > level.  Other factors that can lead to similar levels of exposure

>>>> 
 Radsafers,
 The above dose of 1500 mrem/y from dentures is compared to natural
 background, presumably about 350 mrem/y. Natural background dose of 350 mrem
 is an effective dose equivalent (EDE). Can we assume that the quoted 1500
 mrem from dentures is an EDE?  If so, the local dose rate to the lips and
 mouth must be vastly higher!
 Can anyone tell me if this is so?
 Regards,
 Wes
>>>

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