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Dental laboratory Ferylabor | |
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-- Allergy Dental--
Foreword: F rom the earring, to the post of teeth, nickel, metal allergenic is everywhere: in the alloy of costume jewellery, jeans buttons, watch bracelets, coins, in trace elements… This metal can produce alone more allergic reactions than all other metals. However, it is alloyed with chromium, cobalt, semi-precious metals in most fixed or movable dental prosthesis, such as teeth pivots, crowns and bridges, prostheses squelettées on which climbed false teeth, and so on. Metals and allergiesCurrently, in our industrialized countries, out of two persons, one must have nickel and a small number of them, know some allergie reactions without identifying what cause them, such as itching, gum discase, dryness or burning sensation in the mouth and, further off furthermore, eczema and dermatitis.It is still difficult to prove potential toxicity or reactivity of certain metals present in the mouth. We know, however, that we find concentrations of nickel in bones and tissues surrounding the teeth which are replace in part with it. It appears that nickel is diluted when we test the behaviour of some dental alloys in an autoclave, in a bath of human saliva... Don't swallow anything! Ask about the various components of your future dentures. Choose noble materials which have proved their worth. Studies show that some alloys are safe. It's better you tell your dentist your allergy before. He undertakes some reconstructive operation. Top of material Metals and carcinogenicityRecently, the International Agency for Research on Cancer (IARC) has established a classification of metals into two broad categories: first, metals cancer-producing, or demonstrated potential in humans, the first one contaiming metals with demonstrated or potential carcinogenic effects on humain. And secondly, metals unclassified for their carcinogenic properties.Metals classified in the first category have a potential threat especially used as biomaterials with unstable cehemical dental alloys. In the first category, we find the mutagenic metals such as nickel (and its derivatives) and cobalt. The gold, copper, silver, zinc, platinum,… are non-classified or present no obvious risk. Top of material Bimetallism and galvanic currentsWhen two metals with different electric potential are put together in a galvanic bath , an electrochemical attack occurs on one of them. This last one dissolves and causing metal ions to migrate towards the other.This is exactly the same phenomenon observed in the patient's mouth fitted sailed with several types of metals. Environment buccal (saliva, temperature) acts as galvanic bath, the prosthesis squelettée in non-precious or worse, an amalgam, for example, works as an anode and a gold crown play the role of cathode. One battery is such created in the patient's mouth without his knowing of the lost of energy produced at the expenc of his dental appliance.  Top of material Gold offers the best guaranteesIt is clear that if we want to avoid problems dued to allergies, cancers, bimétallismes related to the placement of dental plates, only one choice is unequivocal:
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