Universal broach system for humeral implants

Patent metadata

Field	Value
Publication number	US-2024138854-A1
Application number	US-202318483140-A
Country	US
Kind code	A1
Filing date	Oct 9, 2023
Priority date	Nov 2, 2022
Publication date	May 2, 2024
Grant date	—

Abstract

A broach for preparing bone for receiving an anchor for a prosthesis comprises a body comprising a superior surface and a socket extending into the superior surface, and an anchoring component extending from the body comprising a spoke extending laterally from the body and a spoke tip extending proximally from the spoke above the superior surface. A system can comprise a distal broach component comprising a broach body, a socket extending into a superior surface of the broach body, and a plurality of cutting spokes extending radially from the broach body, each of the plurality of cutting spokes separated by an interval pattern, and a proximal broach component comprising a spacer body configured to attach to the superior surface of the broach body, and a plurality of spacer spokes extending radially from the spacer body, each of the plurality of spacer spokes separated by the interval pattern.

First claim

The claimed invention is:

1 . A system for preparing a bone for receiving an anchor for a prosthetic implant, the system comprising:
a first distal broach component comprising:
a first broach body;
a first socket extending into a first superior surface of the first broach body; and
a first plurality of cutting spokes extending radially from the first broach body, each of the first plurality of cutting spokes separated by an interval pattern; and
a proximal broach component comprising:
a spacer body configured to attach to the first superior surface of the first broach body; and
a plurality of spacer spokes extending radially from the spacer body, each of the plurality of spacer spokes separated by the interval pattern.

2 . The system of claim 1 , further comprising a second distal broach component, the second distal broach component comprising:
a second broach body; a second socket extending into a second superior surface of the second broach body; and a second plurality of cutting spokes extending radially from the second broach body, each of the second plurality of cutting spokes separated by the interval pattern; wherein at least some of the second plurality of cutting spokes is longer than each of the first plurality of cutting spokes.

3 . The system of claim 1 , wherein:
the first broach body comprises a first coupler; and the spacer body comprises a second coupler configured to mate with the first coupler.

4 . The system of claim 1 , wherein:
each of the first plurality of cutting spokes comprises:
a spoke extending laterally from the first broach body; and
a blade edge extending along the spoke;
wherein each of the first plurality of cutting spokes includes a spoke tip extending proximally from a cutting spoke above a superior surface of the first broach body and a radially extending surface extending flush with the spoke tip toward the first socket.

5 . The system of claim 1 , further comprising:
an onlay implant comprising:
a second attachment component configured to attach to the spacer body;
a planar base attached to the second attachment component; and
a first bearing component attached to the planar base; and
an inlay implant comprising:
a third attachment feature configured to attach to the first socket;
a bowl-shaped base attached to the third attachment feature; and
a second bearing component attached to the bowl-shaped base;
wherein the spacer body has a thickness that is equal to a maximum gap thickness of the inlay implant.

6 . The system of claim 5 , further comprising:
a spacer paddle comprising a spacer body and a handle extending from the spacer body; wherein the spacer body has a thickness that is equal to a maximum gap thickness of the inlay implant; and wherein the maximum gap thickness comprises a distance between a bottom of an articulating surface of the second bearing component and a bottom of the bowl-shaped base.

7 . The system of claim 5 , wherein the bowl-shaped base is connectable to a plurality of different second bearing components each having a different thickness, wherein the plurality of different second bearing components are also attachable to the planar base of the onlay implant.

8 . The system of claim 5 , wherein:
the onlay implant, the proximal broach component and the first distal broach component together form an onlay trialing device; and the inlay implant and the first distal broach component together form an inlay trialing device.

9 . The system of claim 5 , further comprising:
an inserter device configured to insert the first distal broach component and the proximal broach component into bone a fixed distance; and a removal tool comprising:
a knob;
a shaft extending from the knob; and
a threaded tip configured to threadedly engage the spacer body of the proximal broach component.

10 . The system of claim 5 , further comprising:
a reamer guide configured to attach to the first socket of the first distal broach component; and a reamer configured to slide along the reamer guide, wherein the reamer comprises a reamer head configured to be advanced along the reamer guide to fit within a bowl-shaped receptacle formed by a superior surface of the first distal broach component.

11 . A method of implanting a prosthetic component into a bone, the method comprising:
resecting surface of a first bone joint; inserting a spacer paddle to assess laxity of the first bone joint; assembling a proximal spacer body with a distal broach body to form a broach assembly; inserting the broach assembly into a resected surface of a first bone of a joint; determining to use an inlay tray or an onlay tray based on the assessed laxity of the first bone joint; attaching the onlay tray to the broach assembly if the joint is loose; and attaching the inlay tray to the distal broach body if the joint is tight.

12 . The method of claim 11 , wherein attaching the inlay tray to the distal broach body if the joint is tight comprises:
removing the proximal spacer body form the distal broach body if the joint is tight; and reaming the resected surface of the bone.

13 . The method of claim 12 , wherein reaming the resected surface of the bone comprises:
attaching a reamer guide to the distal broach body; and advancing a reamer over the reamer guide to ream the resected surface, wherein the reamer is advanced into a bowl-shaped receptacle formed by a superior surface of the distal broach body.

14 . The method of claim 11 , wherein inserting the broach assembly into the resected surface of the first bone of the joint comprises inserting the distal broach body a fixed distance below the resected surface for both the inlay tray and the onlay tray, the fixed distance equaling a height of the proximal spacer body.

15 . The method of claim 14 , wherein inserting the broach assembly into the resected surface of the first bone of the joint comprises:
loading the broach assembly into an inserter such that blades of the distal broach body extend from the inserter; pushing the blades of the distal broach body into bone matter of the first bone until the inserter contacts the first bone; and actuating the inserter to drive the distal broach body further into the first bone to the fixed distance, thereby positioning the proximal spacer body within bone.

16 . The method of claim 11 , wherein attaching the onlay tray to the broach assembly if the joint is loose comprises positioning a bottom surface of the onlay tray against the resected surface, wherein the joint is loose if the spacer paddle fits into a space between the first bone and a second bone forming the first bone joint.

17 . The method of claim 11 , wherein attaching the inlay tray to the distal broach body if the joint is tight comprises positioning a bottom surface of the inlay tray within the resected surface, wherein the joint is tight if the spacer paddle does not fit into a space between the first bone and a second bone forming the first bone joint.

18 . The method of claim 11 , further comprising:
adding one of a plurality of bearing components that each have a different thickness to the inlay tray to adjust laxity of the joint.

19 . The method of claim 11 , further comprising:
adding one of a plurality of bearing components that each have a different thickness to the onlay tray to adjust laxity of the joint.

20 . The method of claim 11 , wherein inserting the broach assembly into the resected surface of the first bo

Assignees

• Zimmer Inc

Inventors

• Holmes Cody Johnathon
• Mueller Michael
• Stump Steven E

Classifications

• A61B17/1684 Primary

  for the shoulder · CPC title

• A61F2/4003 Primary

  Replacing only the epiphyseal or metaphyseal parts of the humerus, i.e. endoprosthesis not comprising an entire humeral shaft (replacing only the epiphyseal or metaphyseal parts of the femur A61F2/3601) · CPC title

• A61F2/4612

  of shoulders · CPC title

• A61B2017/564

  Methods for bone or joint treatment · CPC title

• A61B17/1778

  for the shoulder · CPC title