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EP-4282383-B1 - ADJUSTABLE ORTHOPEDIC CONNECTIONS

EP4282383B1EP 4282383 B1EP4282383 B1EP 4282383B1EP-4282383-B1

Inventors

  • WINSLOW, NATHAN A.
  • HOPKINS, ANDREW ROLFE

Dates

Publication Date
20260506
Application Date
20180105

Claims (13)

  1. An implant assembly (600) for attachment to a glenoid in a reverse total shoulder arthroplasty, comprising: a tray member (632) configured for attachment to the glenoid; a tray stem (635) extending along a longitudinal axis from a proximal end to an opposing distal end, the tray stem (635) coupled to the tray member (632) at the proximal end; a head member (608) including a convex articular surface, an opposing base surface, and a tapered bore (626) having an opening in the base surface; and a first quasi-spherical member (640) coupled to the distal end of the tray stem (635) such that the first quasi-spherical member (640) is longitudinally spaced from the tray member (632), the first quasi-spherical member (640) positionable through the opening in the base surface and into the tapered bore (626) of the head member (608) for removably locking the first quasi-spherical member (640) to the head member (608).
  2. The implant assembly (600) of claim 1, wherein the tapered bore (626) extends through the head member from the opening in the base surface to an opening in the articular surface.
  3. The implant assembly (600) of claim 1 or claim 2, further comprising a locking pin (652) including a pin base (653) and a pin stem (654) extending from a proximal end to an opposing distal end, the pin stem (654) coupled to the pin base (653) at the distal end.
  4. The implant assembly (600) of claim 3, further comprising a second quasispherical member (655) coupled to the proximal end of the pin stem (654), the second quasispherical member (655) positionable through the opening in the articular surface and into a bore (650) formed within the first quasi-spherical member (640) for providing additional securement of the head member (608) to the first quasi-spherical member (640).
  5. The implant assembly (600) of any one of the preceding claims, wherein the first quasi-spherical member (640) includes a textured outer surface for contacting walls of the tapered bore (626).
  6. The implant assembly (600) of claim 5, wherein the textured outer surface covers more than 50% of the first quasi-spherical member (640).
  7. The implant assembly (600) of claim 5, wherein the textured outer surface includes a plurality of generally planar faces.
  8. The implant assembly (600) of claim 7, wherein the plurality of generally planar faces are spaced from one another on the first quasi-spherical member (640).
  9. The implant assembly (600) of claim 7, wherein the plurality of generally planar faces are contiguous with one another on the first quasi-spherical member.
  10. The implant assembly (600) of claim 7, wherein the plurality of generally planar faces have polygonal perimeters.
  11. The implant assembly (600) of claim 5, wherein the textured outer surface includes a plurality of outermost extensions spaced from one another on the textured outer surface and defining a first radius of the first quasi-spherical member (640) and a plurality of innermost depressions spaced from one another on the textured outer surface and defining a second radius of the first quasi-spherical member (640) and optionally wherein the tapered bore (626) includes a segment with a first diameter that is twice the first radius and a second diameter that is twice the second radius.
  12. The implant assembly (600) of claim 11, wherein the plurality of outermost extensions are symmetrical peaks on the first quasi-spherical member (640).
  13. The implant assembly (600) of claim 5, wherein the textured outer surface includes a three-dimensional tessellation incorporating polygonal surfaces.

Description

TECHNICAL FIELD The present disclosure relates generally to medical technology and in certain aspects to methods and systems for adjustably connecting orthopedic components, e.g., an articulating member to a stem or base. BACKGROUND As further background, the head or other portions of a proximal humerus can be replaced with prosthetic devices, e.g., to treat advanced degeneration of the proximal humerus. Due to the variability of the anatomy, e.g., head height, diameter, inclination and offset to the humeral canal, effective anatomical reconstruction can often necessitate a modular system offering a variety of implant configurations. US 2009/192621 A1 discloses an implant assembly and associated method for selectively performing reverse and traditional arthroplasty for a shoulder joint that includes a humerus and a glenoid. The implant assembly may include a head, a cup, a humeral stem and an adaptor. The method includes inserting the humeral stem to the humerus and connecting a male taper of the adaptor to a female taper of the head. For reverse arthroplasty, the method includes attaching the adaptor to the glenoid and the cup to the stem. For traditional arthroplasty, the method includes attaching the adaptor to the humeral stem and the cup to the glenoid. The method also includes articulating the head with the cup. US 2015/150687 A1 discloses methods and systems for making orthopedic connections where there is unique adjustability to the connection. Illustratively, one embodiment provides a connecting assembly for connecting a plurality of orthopedic components. Such connecting assemblies can include a first orthopedic component that provides a female bore. Additionally the assembly can include a second orthopedic component that can be or include a male-type connecting member that is positionable in the bore of the first orthopedic component. In one preferred form, the male-type connecting member will be a quasi-spherical member. The quasi-spherical member can include a textured outer surface, e.g., for contacting one or more walls or surfaces in the bore in a fashion that removeably locks or helps to removeably lock or fix the quasi-spherical member in the bore. OVERVIEW The invention is set out in claim 1. Optional features of the invention are set out in the dependent claims. The present disclosure provides, in certain aspects, unique methods and systems for integrating or connecting orthopedic components. Illustratively, one aspect of the present disclosure provides a connecting assembly for connecting a plurality of orthopedic components. This particular connecting assembly includes a first orthopedic component that provides a bore. The assembly also includes a second orthopedic component that can be or include a quasi-spherical member that is positionable in the bore of the first orthopedic component for removably locking the quasi-spherical member to the first orthopedic component. The quasi-spherical member includes a textured outer surface such as any of those disclosed herein. The textured outer surface can contact walls of the bore in a manner that removably locks or helps to removably lock the quasi-spherical member to the first orthopedic component. While not necessary, any suitable combination of the following features can be incorporated into or associated with the connecting assembly. The quasi-spherical member can be part of a bone screw or fastener. Such a bone screw can include a shaft (e.g., a fully or partially threaded shaft with or without one or more tapered and/or one or more non-tapered longitudinal sections) that extends away from the quasi-spherical member, for example, where the quasi-spherical member forms all or part of a head of the screw. The orthopedic component can be an implant. The orthopedic component can be a bone plate. With a bone plate, the bore can extend partially or entirely through a wall of the plate. In some forms, a bore will extend entirely through a wall of the plate and a leading tip of the screw will be passed through the bore in advance of the quasi-spherical member. The first orthopedic component can be an articulating ball or head member such as a humeral head. The quasi-spherical member can be a modular component that is connectable to a separate humeral stem component. The textured outer surface can cover a significant portion of the quasi-spherical member such as more than 25% or more than 50%. The textured outer surface can include a plurality of planar surface elements, e.g., with polygonal perimeters. In one aspect, the present disclosure provides a ball-side prosthesis for articulating with a socket in a ball and socket joint in a patient. This particular prosthesis comprises an articulating ball member that includes a top side and a bottom side. The top side provides a convex articulating surface for articulating with surfaces in the socket. The bottom side includes an opening into a bore that extends into the articulating ball member from t