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Medical Forum / General / Dentistry / May 2008Panaroma xrays and lead protection in the front part of body only
I went to the dentist yesterday and he had me take a panaroma xray. He placed a lead protection vest covering my entire front of the body with short flaps over the shoulders. but today, i realized that the xray was coming from around the back of my head (ear to ear) and shooting into film that rotated in front of my face. (ie. xray was shooting from behind my head of the teeth to the film in front of me). Since the xrays was coming from behind my head and my back side was not protected at all i was wondering if this meant i was exposed to the xrays? thanks, rj. The lead apron is for "show". You were not exposed to any significant amount of radiation.  Signature/ Amatus / >I went to the dentist yesterday and he had me take a panaroma xray. He > placed a lead protection vest covering my entire front of the body [quoted text clipped - 7 lines] > > thanks, rj. What do you mean its for show? Were you joking or serious? So to confirm, was i exposed to radiation because i was not covered in the back? thanks! > The lead apron is for "show". You were not exposed to any significant > amount of radiation. [quoted text clipped - 15 lines] > > > thanks, rj. The scattered radiation that bounces below the head is not enough to worry about. The lead apron is there to put people's minds at ease. Signature/ Amatus / > What do you mean its for show? Were you joking or serious? So to > confirm, was i exposed to radiation because i was not covered in the [quoted text clipped - 19 lines] >> >> > thanks, rj. > The scattered radiation that bounces below the head is not enough to worry > about. The lead apron is there to put people's minds at ease. Guess what? so is that "mask" dentists wear, a lot of the mercury dust you kick up when you drill out fillings goes right through it. Also, you know those $100 bills your patients have been paying you with? They are really $1's > The scattered radiation that bounces below the head is not enough to worry > about. The lead apron is there to put people's minds at ease. Congratulations, (siren goes off, and ballons start flying), that's the millionth unsubstantiated opinion on SMD, endorsed by the ADA. Four scientifically unsubstainted opinions, in two posts = three sentences. Gee, Your really good. So are you sweetie. Hard to make 'mercury dust' cutting with a water spray. Lose your mensa card? D > Gee, Your really good. Hey Dartos, are you trying to reason with someone's hatred? Might as well try talking to your tractor. Speaking of which, tomorrow, my view out the front window of the office is a Kubota dealer. Signature/ Amatus / > > So are you sweetie. [quoted text clipped - 6 lines] > >> Gee, Your really good. >Hey Dartos, are you trying to reason with someone's hatred? Might as well >try talking to your tractor. Speaking of which, tomorrow, my view out the >front window of the office is a Kubota dealer. Man, that must be a breath-taking sight to behold. It is nice shade of orange Signature/ Amatus / > >>Hey Dartos, are you trying to reason with someone's hatred? Might as well >>try talking to your tractor. Speaking of which, tomorrow, my view out the >>front window of the office is a Kubota dealer. > > Man, that must be a breath-taking sight to behold. >It is nice shade of orange It's like a Paranormal x-perience, isn't it ? Pan a Roma ! I'm jealous. <G> D >>Hey Dartos, are you trying to reason with someone's hatred? Might as well >>try talking to your tractor. Speaking of which, tomorrow, my view out the >>front window of the office is a Kubota dealer. > > Man, that must be a breath-taking sight to behold. > So are you sweetie. Please don't call me "sweetie". No one who knows me would call me that (for good reason). > Hard to make 'mercury dust' cutting with a water spray. I don't think it is that difficult at all to create Hg vapor. Remember that Hg isn't like most metals so it actually goes from vapor to a solid to a liquid quite easily.The idea that the Hg remains bound to silver throughout the drilling process is a fiction. When you drill an amalgam and heat it, inevitably creating Hg in elemental form what % of Hg is converted into Hg particles and then Hg in liquid form. Would you splash water on a puddle of Hg? Obviously It would seem that cooling the filling would reduce Hg exposure from drilling but I would guess that 1) many dentists don't use such a system or haven't in the past 2) It wouldn't eleminate it, especailly with a high speed drill. 3) The patient can still ingest the Hg (unless you've employed another advanced particulate suction system). . Have you attempted to quantify what the actuall reduction in exposure is for the patient and dentist for all three states Hg can take? Do your ADA brochures say how much of the pulverized amalgam is converted to elemental Hg? Do they include a hypothetical table suchs as: Type of equipment % of Hg converted to liquid % liquid- vapor Highspeed/drill 50 30 no water cooling Low speed drill/ 20 15 water cooling Highspeed drill/ 25 50 water cooling Or do they just say, drilling fillings safe, ADA expert says so! You said DUST. Steve >>Hard to make 'mercury dust' cutting with a water spray. > I don't think it is that difficult at all to create Hg vapor. > You said DUST. I'm sure many dentists use or have used unsafe methods for drilling out fillings, in that they do not use or maximize water cooling. I don't know what methods you personally use. I was not refering specifically to you. Maybe you have the most advanced water cooling, particle removal, oxygen mask/ air filtering system on the planet. If a general dental standard exists requiring the use of water cooling ( I hate to use the words "dental standard", because I know none exists when it comes to Hg exposure and the ADA itself defends itself in court as a trade organization) I'd sure like to see it, and I would be very curios to see how or why that is rationalized in terms of Hg exposure to the patient or dentist. I don't cut tooth structure with a high speed without a continuous water spray. I don't know any dentist who would. This keeps the temperature low so as not to damage the pulp tissue inside the tooth. I'm sure it lessens the possibility of 'melting' any mercury from the bonds with the silver (and other trace metals) in the amalgam. I've been practicing dentistry for 29 years, and the last time I was checked for mercury, I was lower than the U.S. average. I could go on, but my tractor is calling... D >>You said DUST. > [quoted text clipped - 11 lines] > I would be very curios to see how or why that is rationalized in terms > of Hg exposure to the patient or dentist. > I've been practicing dentistry for 29 years, and the last time > I was checked for mercury, I was lower than the U.S. average. You can't check for Hg with a blood test, it is absorbed into the CNS. I.E going to the doctor will not tell you how much Hg you have been exposed to over 29 years, at best it may indicate recent exposure, especially if you had drilled out any fillings in the past couple of days. My understanding is that lead does stay in the blood long term so it can be tested for, but Hg is different. You might also like to know that those most toxic, are less able to excrete Hg (because Hg inhibits certain enzymes) so they actually have lower scores on urine tests, and probably blood tests too. Angel ? >You said DUST. > [quoted text clipped - 3 lines] > >> I don't think it is that difficult at all to create Hg vapor.
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