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Radiopaque dental materials with nano-sized particles

  • US 6,387,981 B1
  • Filed: 10/28/1999
  • Issued: 05/14/2002
  • Est. Priority Date: 10/28/1999
  • Status: Expired due to Term
First Claim
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1. A dental material comprising non-heavy metal oxide particles having an average diameter of less than about 300 nm, an acid modified heavy metal oxide, and a hardenablc resin.

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