US-20260124045-A1 - STACKABLE TIBIAL TRIAL INSERT ASSEMBLIES

US20260124045A1US 20260124045 A1US20260124045 A1US 20260124045A1US-20260124045-A1

Abstract

A tibial trial insert assembly is disclosed. The tibial trial insert assembly includes a baseplate trial, an insert trial selectively coupled to the baseplate trial, the insert trial including an insert trial body having a first insert trial surface and a second insert trial surface positioned opposite the first insert trial surface, the second insert trial surface abutting the baseplate trial in a coupled configuration, and a trial shim selectively coupled to the insert trial, the trial shim including a trial shim body having a first trial shim surface and a second trial shim surface positioned opposite the first trial shim surface, the second trial shim surface abutting the first insert trial surface of the insert trial in the coupled configuration.

Inventors

Douglas Sherman Hawkins
Jacob Scott Matheny
Trevor Allen Schoonover

Assignees

NovoSource, LLC

Dates

Publication Date: 20260507
Application Date: 20251107

Claims (20)

1 . A tibial trial insert assembly, comprising: a baseplate trial; an insert trial selectively coupled to the baseplate trial, the insert trial comprising an insert trial body having a first insert trial surface and a second insert trial surface positioned opposite the first insert trial surface, the second insert trial surface abutting the baseplate trial in a coupled configuration; and a trial shim selectively coupled to the insert trial, the trial shim comprising a trial shim body having a first trial shim surface and a second trial shim surface positioned opposite the first trial shim surface, the second trial shim surface abutting the first insert trial surface of the insert trial in the coupled configuration.
2 . The tibial trial insert assembly of claim 1 , wherein the first insert trial surface defines at least one concave region.
3 . The tibial trial insert assembly of claim 2 , wherein the first insert trial surface further defines a convex region.
4 . The tibial trial insert assembly of claim 2 , wherein the second trial shim surface defines at least one convex region aligned with the at least one concave region of the first insert trial surface in the coupled configuration.
5 . The tibial trial insert assembly of claim 1 , wherein a profile of the second trial shim surface mimics a profile of the first insert trial surface.
6 . The tibial trial insert assembly of claim 1 , wherein one or more cavities are defined in the first insert trial surface of the insert trial.
7 . The tibial trial insert assembly of claim 6 , wherein the trial shim further comprises a projection extending from the second trial shim surface, and wherein at least a portion of the projection is received within the one or more cavity as the trial shim is coupled to the insert trial.
8 . The tibial trial insert assembly of claim 1 , wherein the first insert trial surface of the insert trial includes an indicia.
9 . The tibial trial insert assembly of claim 8 , wherein the indicia is indicative of a thickness of the insert trial.
10 . The tibial trial insert assembly of claim 9 , wherein the indicia is a first indicia, and wherein the first trial shim surface of the trial shim includes a second indicia.
11 . The tibial trial insert assembly of claim 10 , wherein the second indicia is indicative of an overall thickness defined as a sum of the thickness of the insert trial and a thickness of the trial shim.
12 . The tibial trial insert assembly of claim 1 , wherein the trial shim is a first trial shim, the tibial trial insert assembly further comprising: a second trial shim selectively coupled to the first trial shim, the second trial shim comprising a second trial shim body having a third trial shim surface and a fourth trial shim surface positioned opposite the third trial shim surface, the fourth trial shim surface abutting the first trial shim surface of the trial shim in the coupled configuration.
13 . The tibial trial insert assembly of claim 12 , wherein the second trial shim comprises an aperture defined therein, wherein the first trial shim comprises a projection extending from the first trial shim surface, and wherein the aperture is sized to receive at least a portion of the projection.
14 . A tibial trial insert assembly, comprising: a baseplate trial; an insert trial selectively coupled to the baseplate trial, the insert trial comprising an insert trial body having a first insert trial surface and a second insert trial surface positioned opposite the first insert trial surface and abutting the baseplate trial in a coupled configuration, the first insert trial surface comprising: a concave first portion; a convex second portion; and a concave third portion, the convex second portion extending between the concave first portion and the concave third portion; and a trial shim selectively coupled to the insert trial, the trial shim comprising a trial shim body having a first trial shim surface and a second trial shim surface positioned opposite the first trial shim surface and abutting the first insert trial surface of the insert trial, the second trial shim surface comprising: a convex first portion; a concave second portion; and a convex third portion, wherein the concave second portion extends between the convex first portion and the convex third portion.
15 . The tibial trial insert assembly of claim 14 , wherein the concave first portion of the first insert trial surface is aligned with the convex first portion of the second trial shim surface when the trial shim is selectively coupled to the insert trial, wherein the convex second portion of the first insert trial surface is aligned with the concave second portion of the second trial shim surface when the trial shim is selectively coupled to the insert trial, and wherein the concave third portion of the first insert trial surface is aligned with the convex third portion of the second trial shim surface when the trial shim is selectively coupled to the insert trial.
16 . The tibial trial insert assembly of claim 14 , wherein the convex second portion of the first insert trial surface includes an indicia.
17 . The tibial trial insert assembly of claim 14 , wherein the first insert trial surface includes the indicia and the indicia remains visible to a user when the trial shim and the insert trial are in coupled configuration.
18 . The tibial trial insert assembly of claim 14 , wherein the trial shim is couplable to the insert trial while maintaining a coupling between the insert trial and the baseplate trial.
19 . A method of assembling a tibial trial insert assembly in a procedure, the method comprising: coupling an insert trial comprising a first insert trial surface and a second insert trial surface positioned opposite the first insert trial surface to a baseplate trial to abut the second insert trial surface with the baseplate trial; determining a number of one or more trial shims, wherein the one or more trial shims represent an overall thickness; coupling a first trial shim to the insert trial while maintaining the coupling of the insert trial to the baseplate trial, the first trial shim comprising a first trial shim surface and a second trial shim surface positioned opposite the first trial shim surface, the second trial shim abutting the first insert trial surface; and coupling a second trial shim to the first trial shim while maintaining the coupling of the first trial shim to the insert trial and the insert trial to the baseplate, the second trial shim comprising a third trial shim surface and a fourth trial shim surface positioned opposite the third trial shim surface, the fourth trial shim surface abutting the first trial shim surface.
20 . The method of claim 19 , further comprising: decoupling the second trial shim from the first trial shim; decoupling the first trial shim from the insert trial; coupling the second trial shim to the insert trial while maintaining the coupling of the insert trial to the baseplate, wherein the fourth trial shim surface of the second trial shim is abutting the first insert trial surface.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application claims the priority benefit of U.S. Provisional Application No. 63/717,601, entitled “STACKABLE TIBIAL TRIAL INSERT ASSEMBLIES” and filed November 7, 2024, the entire contents of which are incorporated herein by reference. BACKGROUND FIELD The subject matter described herein relates to joint replacement, and more specifically, to trial insert assemblies for use during a trialling phase of a joint replacement procedure and methods of using the same. Technical Background In a knee replacement surgery, such as a total knee arthroplasty, for example, damaged bone and/or cartilage are removed and replaced with an implant that recreates at least a portion of the joint. In various instances, a top surface of the tibia, or shinbone, can be replaced or supplemented with a tibial tray and a tibial insert. Such a tibial insert is typically placed on a flat metal platform (e.g., the tibial tray) allowing for stability using a cushion of strong, durable materials (e.g., plastic) to provide an ability of joint articulation, for example. The tibial insert is sized to fit between a femoral component and a tibial component of a total knee prosthesis. As anatomies and/or extent of injuries vary among subjects, an optimal thickness of the tibial insert can also vary. Trialling is a phase of the knee replacement surgery in which one or more tibial trial inserts are temporarily positioned, or otherwise implanted, in an effort to determine an optimal size and/or geometry for a particular subject prior to replacing the affected bone and/or cartilage with a more permanent tibial insert. Testing tibial trial inserts of various sizes and/or geometries allows a user to judge flexion and extension gaps, soft tissue balancing, stability, and/or motion of the affected knee to increase successful surgery outcomes. Adjusting a geometrical parameter, such as a thickness, of the tibial trial insert during the trialling phase typically involves detaching a first trial insert portion from a base and replacing the first trial insertion portion with a second trial insert portion having a different geometrical parameter. Such removal and attachment of tibial trial inserts continues until a desirable result is achieved. However, trialling by removal and attachment of such tibial trial inserts is challenging and time consuming due to limited size constraints imposed by surrounding anatomical structures. SUMMARY According to at least one aspect of the present disclosure, a tibial trial insert assembly is disclosed. The tibial trial insert assembly includes a baseplate trial, an insert trial selectively coupled to the baseplate trial, the insert trial including an insert trial body having a first insert trial surface and a second insert trial surface positioned opposite the first insert trial surface, the second insert trial surface abutting the baseplate trial in a coupled configuration, and a trial shim selectively coupled to the insert trial, the trial shim including a trial shim body having a first trial shim surface and a second trial shim surface positioned opposite the first trial shim surface, the second trial shim surface abutting the first insert trial surface of the insert trial in the coupled configuration. According to at least one aspect of the present disclosure, a tibial trial insert assembly is disclosed. A tibial trial insert assembly includes a baseplate trial; an insert trial selectively coupled to the baseplate trial, where the insert trial includes an insert trial body having a first insert trial surface and a second insert trial surface positioned opposite the first insert trial surface and is abutting the baseplate trial in coupled configuration, where the first insert trial surface includes a concave first portion, a convex second portion, and a concave third portion, the convex second portion extending between the concave first portion and the concave third portion; and a trial shim selectively coupled to the insert trial, the trial shim including a trial shim body having a first trial shim surface and a second trial shim surface positioned opposite the first trial shim surface and is abutting the first insert trial surface of the insert trial, where the second trial shim surface includes a convex first portion, a concave second portion, and a convex third portion, where the concave second portion extends between the convex first portion and the convex third portion. According to at least one aspect of the present disclosure, a method of assembling a tibial trial insert assembly in a procedure is disclosed. The method of assembling a tibial trial insert assembly in a procedure, the method includes coupling an insert trial including a first insert trial surface and a second insert trial surface positioned opposite the first insert trial surface to a baseplate trial to abut the second insert trial surface with the baseplate trial; and coupling a trial shim to the