COMPOSITE JOINT ARTHROPLASTY SYSTEMS AND METHODS
First Claim
1. A prosthesis for replacing an articular surface on bone, the prosthesis comprising:
- an articulating component formed via casting, the articulating component comprising;
an articulating component joint-facing side comprising an articular surface; and
an articulating component bone-facing side comprising a bone-facing shape; and
a bone anchoring component having a 3D printed structure, the bone anchoring component comprising;
a bone anchoring component joint-facing side comprising a joint-facing shape that is complementary to the bone-facing shape, wherein the bone anchoring component joint-facing side is secured to the articulating component bone-facing side; and
a bone anchoring component bone-facing side comprising a bone engagement surface having a porous structure with pores selected to facilitate in-growth of the bone into the pores.
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Accused Products
Abstract
A prosthesis may have an articulating component formed via casting and a 3D printed bone anchoring component with a joint-facing side and a bone-facing side. The bone-facing side may have a bone engagement surface with a porous structure with pores selected to facilitate in-growth of the bone into the pores. The bone facing side may further have a surface layer of Titanium Dioxide nanotubes. The joint-facing side may be secured to the articulating component by melting Titanium nanoparticles at a temperature below the melting temperatures of the major constituents of the articulating component and/or the bone anchoring component, such as Cobalt, Chromium, and/or Titanium, so as to avoid significantly modifying the crystalline structures of the articulating component and/or the bone anchoring component. The melting temperature of the Titanium nanoparticles may be about 500° C.
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Citations
20 Claims
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1. A prosthesis for replacing an articular surface on bone, the prosthesis comprising:
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an articulating component formed via casting, the articulating component comprising; an articulating component joint-facing side comprising an articular surface; and an articulating component bone-facing side comprising a bone-facing shape; and a bone anchoring component having a 3D printed structure, the bone anchoring component comprising; a bone anchoring component joint-facing side comprising a joint-facing shape that is complementary to the bone-facing shape, wherein the bone anchoring component joint-facing side is secured to the articulating component bone-facing side; and a bone anchoring component bone-facing side comprising a bone engagement surface having a porous structure with pores selected to facilitate in-growth of the bone into the pores. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for manufacturing a prosthesis for replacing an articular surface on a bone, the method comprising:
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casting an articulating component comprising; an articulating component joint-facing side comprising an articular surface; and an articulating component bone-facing side comprising a bone-facing shape; and 3D printing a bone anchoring component comprising; a bone anchoring component joint-facing side comprising a joint-facing shape that is complementary to the bone-facing shape; and a bone anchoring component bone-facing side comprising a bone engagement surface having a porous structure with pores selected to facilitate in-growth of the bone into the pores; and securing the bone anchoring component joint-facing side to the articulating component bone-facing side. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for manufacturing a prosthesis for replacing an articular surface on a bone, the method comprising:
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casting metals comprising at least Cobalt and Chromium to form an articulating component comprising; an articulating component joint-facing side comprising an articular surface; and an articulating component bone-facing side comprising a bone-facing shape; and direct metal laser sintering Titanium to form a bone anchoring component comprising; a bone anchoring component joint-facing side comprising a joint-facing shape that is complementary to the bone-facing shape; and a bone anchoring component bone-facing side comprising a bone engagement surface having a porous structure with pores selected to facilitate in-growth of the bone into the pores; applying a paste containing Titanium nanoparticles to at least one of the bone anchoring component joint-facing side and the articulating component bone-facing side; assembling the articulating component and the bone anchoring component such that the paste is sandwiched between the bone anchoring component joint-facing side and the articulating component bone-facing side; and heating the paste to a bonding temperature sufficient to commence melting of the Titanium nanoparticles to secure the bone anchoring component joint-facing side to the articulating component bone-facing side. - View Dependent Claims (20)
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Specification