Since having seven crowns (manufac-tured by Lava), my health has taken a serious turn for the worse. My dentist assured me that there was no metal of any sort in these crowns and, indeed, they are marketed as 'metal-free'. However, when speaking to the lab that manufactured my crowns, I learned that they contain zirconia, an oxide form of zirconium, which is a metal. I am now intent on removing all seven crowns and intend to replace them with plastic crowns with the assurance that these will definitely not contain any undeclared metals.
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