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Medical Forum / General / Dentistry / March 2005Amalgam Exposure and Neurological Function
Interesting article in the March issue of Neuro Toxicology. It followed 1663 subjects of the ongoing Air Force Health Study of Vietnam era veterans. Oral health exams have been part of the standard AFHS medical exams since 1992 because "peripheral neuropathy" is considered to be an important adverse neurological effect of high levels of exposure to elemental mercury. But as with other neurological effects, the study found no connection of amalgam to any level of peripheral neuropathy. "We were unable to detect any associations between amalgam exposure and clinical signs of either neuropathy or a diminished sensation of the big toe among adult males--these are standard measures for diagnosing clinical neuropathy," says Dr. Kingman. "The bottom line," says co-researcher James W. Albers, M.D.,Ph.D, of the University of Michigan Medical School, "is there was no association between abnormal neurological signs and amalgam exposure. So these findings do not support the hypothesis that amalgam exposure produces clinical evident neurological effects." <www.lsro.org> > Interesting article in the March issue of Neuro Toxicology. It > followed 1663 subjects of the ongoing Air Force Health Study of [quoted text clipped - 7 lines] > But as with other neurological effects, the study found no connection > of amalgam to any level of peripheral neuropathy. But then if you actually read the abstract they admit there where limitations to fine testing of perihpal neuropathy in the study. Furthermore they say: "A statistically significant association was detected between amalgam exposure and the continuous vibrotactile sensation response for the combined non-diabetic participants and separately for non-diabetic AFHS controls." I won't even ask how they assesed "amalgam exposure" for Vietnam vets considering that those with the highest saliva hg levels in other studies do not necessarily have the most amalgam and current testing cannot assess past exposure which would be the most likely contributor to these conditions. (Why would an amalgam leaking, say 200ug/day in 1970, continue leaking at that rate all the way through 2005? The filling would lose most of its Hg by then. That may seem trivial but it is an important point! Taking an inaccurate blood test and counting amalgam surfaces on some random day in 2003 to assess the "real" Hg exposure from amalgam over the past 30 years just doesn't cut it). Also note the small study size making it impossible to determine effects in say the 1% most exposed. I'm glad the average person hasn't developed significant neuropathy from having a little more amalgam. But these "amalgam surface counting" studies which attempt to convert that fact into a declaration of amalgam safety really get tiresome after a while. Responding to C(ra)Z(y) is pretty much pointless, but I'll bet a dollar to a pig turd that an analysis of a 20 yr. old amalgam will show well over 90% of the original mercury content. CZ's wild speculation is just that. BTW, I still haven't used amalgam in over 20 years (and I am a general dentist, not an orthodontist or oral surgeon). Fawks > (Why would an amalgam leaking, say 200ug/day in 1970, continue > leaking at that rate all the way through 2005? The filling > would lose most of its Hg by then. > Responding to C(ra)Z(y) is pretty much pointless, but I'll bet > a dollar to a pig turd that an analysis of a 20 yr. old amalgam > will show well over 90% of the original mercury content. CZ's > wild speculation is just that. Great, so then you can tell me what the worst case loss of Hg from amalgam is. It is....... Fawks you conception of what an amalgam is and how it works is messed up. I copied this quote from a government document: "Elemental mercury, the focus of this document, makes up about 50 percent by weight of dental amalgam when it is mixed. Atoms of elemental mercury continuously diffuse from the amalgam used as a dental restorative (30-33). This molecular diffusion proceeds from the amalgam through the amalgam oxide, the saliva, and the air boundary layers into air flowing through the mouth. Each of these layers provides some resistance to the movement of elemental mercury from the amalgam into the mouth air flow. Chewing, brushing, and other abrasive stress on exposed surfaces of dental amalgam can alter the protective characteristics of the oxide layer and increase the rate at which elemental mercury is released" Note that chewing, saliva and other abrasive stress increases the rate of release, but the "continous diffusion" of atoms from the surface is a separate process. In fact the Hg atoms continuoulsy move from the surface through the oxide layer and saliva. If you have studies showing longterm Hg loss from amalgam then post it. Note that you would have to keep track of the orginal Hg content of each amalgam, wait 10-20 years, remove it from the patients mouth and measure again. Know any studies where the NDICR has done that for 1000 amalgams? I didn't think so. >Responding to C(ra)Z(y) is pretty much pointless, but I'll bet >a dollar to a pig turd that an analysis of a 20 yr. old amalgam >will show well over 90% of the original mercury content. CZ's >wild speculation is just that. Will have to look around for a pig turd. Wait... ...CZ's posts should suffice. >BTW, I still haven't used amalgam in over 20 years (and I am >a general dentist, not an orthodontist or oral surgeon). [quoted text clipped - 4 lines] >> leaking at that rate all the way through 2005? The filling >> would lose most of its Hg by then. -- W_B wubbabubbazG@RBAGEyahoo.com Take out the G'RBAGE > >Responding to C(ra)Z(y) is pretty much pointless, but I'll bet > >a dollar to a pig turd that an analysis of a 20 yr. old amalgam [quoted text clipped - 4 lines] > > Wait... The name calling only goes so far. At some point you have to answer basic questions about amalgam or admit you are a bunch of scientifically illiterate losers. > The name calling only goes so far. At some point you > have to answer basic questions about amalgam or admit > you are a bunch of scientifically illiterate losers. Protesting name calling by calling names...you sure your problem wasn't irony poisoning? T "We" called no names what-so-ever. 'A dollar to a pig turd' does not call any names. It is simply describing a sucker bet. C(ra)Z(y) said there was name calling involved. He was wrong again. Fawks >"We" called no names what-so-ever. 'A dollar to a pig turd' does not >call any [quoted text clipped - 5 lines] > >Fawks That's true, and provokes an interesting imagery. > >"We" called no names what-so-ever. 'A dollar to a pig turd' does not > >call any [quoted text clipped - 7 lines] > > That's true, and provokes an interesting imagery. Okay Fawks statments reminds me of the manure that is wraped in the sh.t that is the ADA propaganda crap he may eat. note i am merely making scientific observations about different kinds of natural fertilizer some of which people may ingest.. BUT NOTE, i am not calling anyone any names! >> That's true, and provokes an interesting imagery. > [quoted text clipped - 3 lines] >natural fertilizer some of which people may ingest.. BUT NOTE, i am not >calling anyone any names! If you say so ....... >> >"We" called no names what-so-ever. 'A dollar to a pig turd' does >not [quoted text clipped - 15 lines] >natural fertilizer some of which people may ingest.. BUT NOTE, i am not >calling anyone any names! VCMS .. Stephen Mancuso, D.D.S. Troy, Michigan, USA I am writing on a Tablet-PC,so forgive me if the PC misreads my handwriting. For a while, I refused to block anybody in SMD, sort of like SB. I have 6 blocked in SMD. It is so nice to go to work and not see these idiots at all on the screen. I am convinced that it makes for a better day not seeing the spew from these idiots - my staff has seen a difference too. If I had not, I would never log in. Why on earth should we start our morning with a bunch of inaccurate, idiotic, soapbox rantings that ruin a good day. I'll bet you some that have not seen the light, let this attitude spill over into patient encounters - that simply should not be. Dan >For a while, I refused to block anybody in SMD, sort of like SB. I have 6 >blocked in SMD. It is so nice to go to work and not see these idiots at all [quoted text clipped - 6 lines] > >Dan I only see posts from the Hydra here at home. I periodically take away the filters here at home to see if they have improved their communications skills. So far, no change. .. Stephen Mancuso, D.D.S. Troy, Michigan, USA I am writing on a Tablet-PC,so forgive me if the PC misreads my handwriting. >For a while, I refused to block anybody in SMD, sort of like SB. I have 6 >blocked in SMD. It is so nice to go to work and not see these idiots at all [quoted text clipped - 6 lines] > >Dan Of course, one can keep the pulse on what people think about various topics without actually reading them ........ Sounds weird, I know ...... But you get the picture ... Joel >"We" called no names what-so-ever. 'A dollar to a pig turd' does not >call any [quoted text clipped - 5 lines] > >Fawks Not to mention that I didn't call C(ra)Z(y) a pig turd. I referred to C(ra)Z(y)'s posts as pig turds. -- W_B Take out the G'RBAGE wubbabubbazG@RBAGEyahoo.com >> The name calling only goes so far. At some point you >> have to answer basic questions about amalgam or admit [quoted text clipped - 4 lines] > >T Splorf.... you owe me a keyboard. -- W_B Take out the G'RBAGE wubbabubbazG@RBAGEyahoo.com > BTW, I still haven't used amalgam in over 20 years (and I am > a general dentist, not an orthodontist or oral surgeon). > > Fawks But Pig Turds... Do you use Pig Turds? Is there PT in those fillings you so blithely place in peoples' mouths, Hey? Did you do the studies???? Did you measure blood levels of Pig Turd in your patients???? WELL?!?!?!?!? I'm tellin' GWB 'bout this.... ;-) SP  SignatureNot a real Addy, yet >> BTW, I still haven't used amalgam in over 20 years (and I am >> a general dentist, not an orthodontist or oral surgeon). [quoted text clipped - 9 lines] >I'm tellin' GWB 'bout this.... ;-) >SP OK, I hear ya. -- W_B Take out the G'RBAGE wubbabubbazG@RBAGEyahoo.com >>WELL?!?!?!?!? >> [quoted text clipped - 7 lines] >Take out the G'RBAGE >wubbabubbazG@RBAGEyahoo.com R E P L Y Re: Amalgam Exposure and Neurological Function Translation: When we talk about amalgam at the newsgroup, Jan Drew goes psycho. Joel There has never been any relation to mercury poisoning and amalgam in all studies to date. I have practiced dentistry over forty years. Amalagam neither gathers mercury or loses mercury. . > Amalagam neither gathers> mercury or loses mercury. Suspicous ID. I'm sure JE can tell you to the contrary. >. >> >> Amalagam neither gathers> mercury or loses mercury. > >Suspicous ID. I'm sure JE can tell you to the contrary. Yeah, mercury does exit the filling ........ Sorry about that though. Joel > There has never been any relation to mercury poisoning and amalgam in all > studies to date. > I have practiced dentistry over forty years. Amalagam neither gathers > mercury or loses mercury. Actually there is no such thing as mercury. >> There has never been any relation to mercury poisoning and amalgam in all >> studies to date. [quoted text clipped - 3 lines] > >Actually there is no such thing as mercury. OKay Jan, I will bite. Tell us why. Joel |
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