Radio opaque plastics and process of making
June 18, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3715331 3786808 3801344 3808170 Radio-opaque dental restorative material X-ray opaque, enamel-matching dental filling composition Glass ceramic as filler in polymerizable dental filling compositions Denture bases of X-ray opaque polymers Glass ceramic as filler in polymerizable dental filling compositions X-ray opaque filler useful in dental and medical restorative compounds InventorApplicationNo. 539807 filed on 06/18/1990US Classes:433/224, Endodontic433/201.1, Dental implant construction623/11.11IMPLANTABLE PROSTHESISExaminersPrimary: Wilson, John J.Attorney, Agent or FirmForeign Patent References
International ClassA61C 005/02AbstractA plastic article having heavy metal particles uniformly dispersed throughout the plastic article to produce a plastic article that is visible on an x-ray image of the plactic with one embodiment of the plastic article forming a solid tooth implant covered with a flowable gutta-percha filler material for insertion into the root canal of a tooth wherein a photoshadowgraph of a tooth containing the solid tooth implant and a solidified gutta-percha covering appears as a single image with the preferred mixture for the solid implant composition consists of about 50% by weight of a polymer plastic pellets and the balance about 50% by weigh of heavy metal particles selected from the group consisting of tungsten and tantalum particles. | |
