口腔保健知多少 补牙材料含水银

来源: Trampoline 2015-11-11 18:11:42 [] [博客] [旧帖] [给我悄悄话] 本文已被阅读: 次 (32912 bytes)
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Please Remove "Silver Fillings" ASAP!



含水银的补牙材料,在你夜晚磨牙、白天刷牙、吃东西、打磨牙齿补牙时,会产生高浓度的水银蒸气(比一般职场监管的浓度要高得多),多数会被吸入体内,对身体产生危害。

小心含水银补牙材料让你患病

据英国《独立报》29日报道,2012年FDA一改以往汞补牙无害的立场,在其官方网站发布警告:“补牙用材料汞齐含有水银成分,可能对发育中的儿童和胎儿的神经系统产生毒害作用。”

FDA认为,汞齐在补牙过程中填充或取出以及用汞齐补过的牙齿咀嚼时,均会释放对人体有害的水银蒸气。FDA正在检讨先前制定的有关补牙材料规定,预计今后可能限制或禁止使用汞齐。

汞齐是补牙的常见材料。仅在欧盟每年就耗用125吨汞齐。挪威和丹麦已宣布禁止使用水银和汞齐补牙。瑞典、芬兰和日本已对汞齐补牙做出严格限制。

水银是金属汞的俗称,汞与其他金属形成的合金称为汞齐或汞合金。汞具有毒性,严重汞中毒会致人死亡,长期低剂量的汞污染也会对人的神经系统造成伤害。

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银汞作为充填材料应用于临床已逾100年了。它具有抗御强大咀嚼力和容易操作的特性,至今仍被广泛应用。但粘结复合树脂正在迅速改变着牙科的临床服务现状,逐渐成为临床医师首选的充填材料。  

While the use of mercury-free fillings, such as tooth-colored composite resins and ceramics, are becoming more prevalent and better performing, approximately 46% dentists in the United States still use mercury-containing dental amalgam. Since the Civil War, mercury-containing fillings (often called “silver” or “amalgam”) continue to be used extensively to fill dental cavities. A 2006 poll of 2,590 US adults found that 72% of respondents were not aware that mercury was a main component of dental amalgam, and 92% of respondents would prefer to be told about mercury in dental amalgam before receiving it as a filling. This could be compared to being given a drug today by a pharmacy without the mandated FDA prescribing information (contents, possible side effects, etc.). Unfortunately, many dentists continue to place mercury-containing fillings, with many patients remaining uninformed of its mercury content.

 

Toxic Teeth: Are Amalgam Fillings Safe? | The Dr. Oz Show

http://www.doctoroz.com/article/toxic-teeth-are-our-amalgam-fillings-safe?

One of the most vexing issues in dentistry today revolves around the use of silver fillings (amalgams) in our mouths. Do we need to take out the old mercury-laden silver fillings for fear of health issues and replace them, or are there better restorative dentistry options that do not pose any potential risk to our health? Dental professionals in the United States and around the world are currently debating this hot issue.
 
Amazingly, 72% of those surveyed in the US did not know that silver fillings contain mercury and when they do find out, 92% of the respondents would have wanted to know about the possible mercury issues when the silver fillings were first placed.
 
Mercury is a powerful neurotoxin and, at certain levels, can cause neurological issues, autoimmune disease, chronic illnesses and mental disorders. The burning question is whether an unknown quantity of mercury vapor in our silver fillings at a constant exposure poses a significant health risk. 
 
Amalgams consist of 50% mercury along with a combination of silver, tin, and copper. Studies have found that the amount of mercury vapor from amalgams varies from 1- 3 ug/day (micrograms/day), at the low estimation, up to 27 ug/day. This translates to 3% to 68% of workplace air quality standards that are allowable by the Occupational Safety and Health Administration (OSHA, our federal environmental agency). What this means is that at the high level – and with continuous exposure – we could be at levels that OSHA says are unhealthy. The World Health Organization (WHO) has stated that the exposure to mercury vapor can greatly increase beyond this number due to personal habits such as grinding of the teeth, chewing gum, and drinking carbonated drinks. This could lead to a fivefold increase in mercury levels after these activities.
 
In addition to the problems with mercury vapor coming off of silver fillings in our mouth, there is the issue of water contamination from removing the silver fillings and the ensuing environmental impact as the mercury finds its way into the water supply.
 
The WHO (World Health Organization) reports that mercury from amalgam and laboratory devices accounts for 53% of total mercury emissions into our environment. The EPA recommends that dentists use amalgam separators to catch and hold excess amalgam waste, to decrease the release of mercury into the sewer system. At this time, these are not mandatory in the US. Let’s all be aware of the environmental issues surrounding amalgam removal and nudge our elected officials to get current on this problem and come up with solutions.
 
......

Dentist working on a patient

Did you know that the FDA proposed restricting mercury amalgam dental fillings back in 2011? If that comes as a surprise, don’t feel bad. We didn’t know about it either, and we pay close attention to such things.

According to an investigative report by Greg Gordon for McClatchy Newspapers,

“Senior U.S. health officials have squelched a Food and Drug Administration proposal that for the first time would have curbed dentists’ use of mercury – one of the planet’s nastiest toxins because it attacks the central nervous system – in treating Americans’ decayed teeth.”

The People‘s Pharmacy & Silver Fillings

Over 25 years ago we were concerned enough about the potential toxicity of mercury amalgam dental fillings to start interviewing dentists about the issue on our radio show. Michael Fleming, DDS, was one of the first dentists to express concern that so-called silver fillings might be harmful to people’s health on The People’s Pharmacy (February 11, 1989).

Other dentists, especially those linked to dental schools or the American Dental Association (ADA), reassured our listeners that there was nothing to worry about. The argument seemed to be that mercury had been used in dental amalgams for decades and there was no clear evidence of harm. Basically it was a “don’t worry, be happy” kind of message.

Mercury Toxicity?

But we were worried. Mercury is nasty stuff. There was evidence years ago that if someone had silver fillings and chewed food, some mercury vapor could be inhaled into the lungs. By the way, how could anyone not chew food with mercury amalgams? When such fillings are removed, it is pretty clear that they are no longer in their original condition. The amalgams wear down and the mercury presumably ends up somewhere…most likely, in the body.

Although no one likes to state this publicly, we suspect that one reason mercury amalgam fillings remain popular with the ADA is that some dentists find them less expensive and easier to place than composite fillings. Then there is the huge unspoken concern about legal liability. Were the ADA to agree that silver fillings were unsafe, there might be a flood of lawsuits from people claiming they had been harmed by the mercury in their fillings.

The FDA’s Checkered Track Record on Amalgams

For a long time the FDA has apparently been telling the American public that there is nothing to worry about when it comes to mercury fillings. In 2009 such “dental devices” were declared safe and effective. This past winter the FDA denied petitions seeking to ban amalgams on the grounds that the mercury was harmful to the kidneys and could also cause neurological diseases.

The FDA’s position seems to have been that there was inadequate evidence demonstrating harm from mercury in amalgams. Consequently, “don’t worry, be happy.”

The Big Secret U-Turn

At the same time that the FDA was denying petitions to restrict mercury amalgam fillings, top leaders within the agency were, according to Greg Gordon, crafting a proposal that would have advised dentists to stop using mercury-containing fillings in pregnant or nursing women, young children or people with neurological diseases. Mr. Gordon reports that:

“It also urged dentists to avoid using fillings that contain mercury compounds in any patient, where possible.”

What Happened to the Secret Proposal?

Although some FDA officials were beginning to have second thoughts about the safety of mercury-containing amalgam fillings, the leaders at the Department of Health and Human Services were not on board with the reversal. Remember that the people in charge at HHS are FDA’s bosses. From what we can glean, these people decided to reject the new policy from the FDA and keep it hush-hush.

Mercury Toxicity?

How dangerous are amalgam fillings? The ADA position still seems to be that the mercury in such silver fillings stays put and is not worrisome. The counter-argument is that mercury is absorbed into the body gradually over decades and can lead to a range of harms. In particular, there is worry that mercury accumulates in kidneys and brain. Some studies suggest that excess mercury may contribute to dementia.

A recent review in the journal Frontiers in Cellular Neuroscience (April 10, 2015) had this to say about mercury and Alzheimer’s disease:

“Mercury (Hg) is a heavy metal with a high potential to cause neurotoxicity. Early studies about Minamata and Iraq disasters led us to understand the neurotoxicity of this metal. It is widely accepted that Hg disrupts the brain development and produces cognitive and motor disabilities, and in adults, Hg exposure produces memory loss and cognitive alterations. An early study suggested a link between Hg exposure and AD.”

The Bottom Line

The final word is not yet in on the safety or harm of mercury-containing dental fillings. What concerns us the most, however, is that the secret FDA proposal to limit exposures to mercury was squelched by HHS. Why did that happen? Who made this decision? And where is the research to decide this debate once and for all? Without good data, we cannot make intelligent decisions about our health.

What is your experience with silver fillings? If you have any thoughts on this topic, please share them below in the comment section. We would also be grateful if you would vote on this article at the top of the page.

 

Safe Removal of Amalgam Fillings - IAOMT

https://iaomt.org/safe-removal-amalgam-fillings/
Oct 28, 2015 - The mercury free dentists of the world have been acutely aware of the potential for excess exposure to mercury when removing amalgam ...

 

Mercury Safe Dentists, Amalgam/Silver Filling Free Dentists ...

www.dentalwellness4u.com/freeservices/find_dentists.html

Scroll through the list until you find a Mercury Safe Dentist in your city, or a city close to you. Click on the dentist's name to learn more about him or her. Only dentists who are Listed on Dr. McGuire's Mercury Safe Dentist Internet Directory are listed.

 

 

 

所有跟帖: 

现在的齿科还用含汞的材料修补牙齿么? -大江川- 给 大江川 发送悄悄话 大江川 的博客首页 (0 bytes) () 11/11/2015 postreply 19:47:00

10年前咳嗽糖吃多,补过唯一一颗牙,银色的, 估计含汞。下次洗牙要问问牙医 -Trampoline- 给 Trampoline 发送悄悄话 Trampoline 的博客首页 (65 bytes) () 11/11/2015 postreply 20:18:51

我的理想,因为牙老了,舍不得用。我想发明生物牙,革命现存落后反动的牙科。 -大江川- 给 大江川 发送悄悄话 大江川 的博客首页 (0 bytes) () 11/11/2015 postreply 22:34:03

嗯。忘记回复你的问了:?1颗牙,有点水银微释放,或许以毒补身了,哈哈。己知,微元素Hg -大江川- 给 大江川 发送悄悄话 大江川 的博客首页 (53 bytes) () 11/11/2015 postreply 22:39:14

我很少看牙医,从未补过牙。将来,会将旧牙统一拔除,换1口高科技牙,有血有肉有感觉。请看 -大江川- 给 大江川 发送悄悄话 大江川 的博客首页 (23 bytes) () 11/11/2015 postreply 20:03:17

什么高科技都信,但对自己的身体还是只相信天然原装的 -羽衣甘蓝- 给 羽衣甘蓝 发送悄悄话 (0 bytes) () 11/11/2015 postreply 22:33:00

可以等待昐望第二代恒齿的降临。 -大江川- 给 大江川 发送悄悄话 大江川 的博客首页 (0 bytes) () 11/11/2015 postreply 22:35:21

我看的老美牙医,他太太(60多岁吧)的牙齿上有不下八九处小黑点,除了影响美观,如果水银材料确实对身体不好,人家不早换树脂了? -爱吃肉的胖子- 给 爱吃肉的胖子 发送悄悄话 (0 bytes) () 11/11/2015 postreply 20:24:02

牙医太太牙齿那么差?牙医失职呵 -Trampoline- 给 Trampoline 发送悄悄话 Trampoline 的博客首页 (0 bytes) () 11/11/2015 postreply 20:45:01

牙好坏是天生的。 -goldilock- 给 goldilock 发送悄悄话 (0 bytes) () 11/11/2015 postreply 22:52:37

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