US 2022/0151787 A1Published application

Prosthesis with surfaces having different textures and method of making the prosthesis

AssigneeDepuy Ireland Unlimited Company

InventorsSTEPHANIE M. WAINSCOTT, DAREN L. DEFFENBAUGH, HENGDA D. LIU, ANDREW J. MARTIN, JEFFREY A. RYBOLT, BRYAN J. SMITH, ANTHONY D. ZANNIS

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Abstract

A joint prosthesis system is suitable for cementless fixation. The system includes a metal implant component that has a mounting surface for supporting an insert. The metal implant component includes a solid metal portion and a porous metal portion. The porous metal portion has surfaces with different characteristics, such as roughness, to improve bone fixation, ease removal of the implant component in a revision surgery, reduce soft tissue irritation, improve the strength of a sintered bond between the solid and porous metal portions, or reduce or eliminate the possibility of blood traveling through the porous metal portion into the joint space. A method of making the joint prosthesis is also disclosed. The invention may also be applied to discrete porous metal implant components, such as augment.

Claims2

Dependent claims

An orthopaedic prosthetic component, comprising:

a polymer modular tibial bearing component, and
a tibial tray component configured to be implanted into a proximal end of a patient's tibia and assembled with the modular tibial bearing intraoperatively, the tibial tray component comprising:
a proximal-facing surface configured to receive the modular tibial bearing component,
a distal-facing surface positioned opposite the proximal-facing surface,
an outer wall extending between the distal-facing surface and the proximal-facing surface,
a solid metal portion including the proximal-facing surface and a proximal section of the outer wall, and
a single, integral metal portion including (i) a porous base including a distal-facing surface and a distal section of the outer wall, (ii) a central stem extending distally from the distal-facing surface of the porous base, and (iii) a plurality of pegs extending distally from the distal-facing surface of the porous base.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/533,176Filed 23 Nov 2021
Priority: 21 May 2009
Published: 19 May 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification31 codes

A61F 2/30734
Accessories: modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect
A61F 2/38
Joints: for elbows or knees
A61F 2/389
For elbows or knees: tibial components
A61F 2/4202
For wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes: for ankles

Family

Application12/470,397Continuation in part · filed 21 May 2009
Application61/256,468Us provisional application · filed 30 Oct 2009
Application12/904,578Division · filed 14 Oct 2010
Application14/794,926Division · filed 9 Jul 2015
Application15/589,216Continuation · filed 8 May 2017
Application16/534,287Continuation · filed 7 Aug 2019
Application17/533,176Continuation
Application15/589,216Division
Application12/904,578Continuation in part
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From the US filing history. Foreign family members aren’t listed.