Solid freeform fabrication of implant components

Patent metadata

Field	Value
Publication number	US-9636229-B2
Application number	US-201314033095-A
Country	US
Kind code	B2
Filing date	Sep 20, 2013
Priority date	Sep 20, 2012
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

Disclosed are designs, methods and systems for manufacturing implants, implant components, features of implant components, and/or related tools using solid freeform fabrication or additive metals technologies.

First claim

What is claimed is:

1. A method of making a tibial implant component for knee joint arthroplasty, the method comprising: designing a tibial tray, at least one anchoring peg extending from a bone-facing surface of the tibial tray; designing an anchoring peg extending from the bone-facing surface; and forming the implant component, based on the designs for the tibial tray and the anchoring peg, as an integral structure using an additive manufacturing process, wherein the designing of the anchoring peg includes designing at least a portion of the anchoring peg to be formed of a lattice structure comprising a plurality of generally straight individual filaments, the lattice structure extending across a cross-section of the anchoring peg, wherein the tibial tray is configured to include a substantially solid structure.

2. The method of claim 1 , wherein the designing at least a portion of the anchoring peg to be formed of a lattice structure further comprises determining, based, at least in part, on patient-specific information regarding an individual patient, at least one parameter of the lattice structure selected from the group of parameters consisting of filament width, spacing between filaments, angle of filaments, and interconnections between filaments.

3. The method of claim 1 , further comprising performing a finite element analysis of the lattice structure and modifying one or more parameters of the lattice structure based on the finite element analysis.

4. The method of claim 1 , wherein the additive manufacturing comprises a technique selected from the group of manufacturing techniques consisting of electron beam melting, selective laser sintering, selective laser melting, stereolithography, direct metal laser sintering, three-dimensional printing, fused deposition modeling, laser curing, and laser engineered net shaping.

5. The method of claim 1 , further including providing patient-specific information regarding an individual patient, wherein the step of designing the tibial tray includes using the patient-specific information to select or determine a dimension or geometry of the tibial tray.

6. The method of claim 5 , wherein the patient-specific information includes electronic image data of a knee joint of the individual patient.

7. The method of claim 5 , wherein the patient-specific information includes size and/or shape information regarding a knee joint of the individual patient.

8. The method of claim 1 , wherein the tibial tray and the anchoring ped are configured such that the tibial tray can be intraoperatively separated from the anchoring peg, when the anchoring peg is positioned within a patient's tibia, by directing a cutting tool along the bone-facing surface of the tibial tray and cutting through at least a portion of the lattice structure.

Assignees

• Conformis Inc

Inventors

• Lang Philipp
• Slamin John

Classifications

• B22F10/38

  to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures · CPC title

• B22F10/28

  Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title

• A61F2002/4619

  for extraction · CPC title

• B22F2998/10

  Processes characterised by the sequence of their steps · CPC title

• A61F2/461 Primary

  of knees · CPC title