OSSEOINTEGRATIVE SURGICAL IMPLANT

摘要

Embodiments of the present invention provide an osseointegrative implant and related tools, components and fabrication techniques for surgical bone fixation and dental restoration purposes. In one embodiment an all-ceramic single-stage threaded or press-fit implant is provided having finely detailed surface features formed by ceramic injection molding and/or spark plasma sintering of a powder compact or green body comprising finely powdered zirconia. In another embodiment a two-stage threaded implant is provided having an exterior shell or body formed substantially entirely of ceramic and/or CNT-reinforced ceramic composite material. The implant may include one or more frictionally anisotropic bone-engaging surfaces. In another embodiment a densely sintered ceramic implant is provided wherein, prior to sintering, the porous debound green body is exposed to ions and/or particles of silver, gold, titanium, zirconia, YSZ, α-tricalcium phosphate, hydroxyapatite, carbon, carbon nanotubes, and/or other particles which remain lodged in the implant surface after sintering. Optionally, at least the supragingival portions of an all-ceramic implant are configured to have high translucence in the visible light range. Optionally, at least the bone-engaging portions of an all-ceramic implant are coated with a fused layer of titanium oxide.

主权项

1. A threaded ceramic implant produced by a manufacturing process comprising:
injecting a powdered ceramic feedstock into a mold cavity, said powdered ceramic feedstock comprising a colloidal mixture of ultrafine powdered zirconia suspended in a heated liquid binder, said mold cavity comprising at least one female thread; causing or allowing said injected feedstock to cool in said mold cavity such that it forms a substantially solid green body having at least one mating male thread corresponding to said at least one female thread; removing said green body from said mold at least in part by rotating and unscrewing said green body from said mold; debinding said green body so as to remove a majority of said binder; and sintering said debound green body so as to form said threaded ceramic osseointegrative dental implant.