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US-12616578-B2 - Total reverse shoulder systems and methods

US12616578B2US 12616578 B2US12616578 B2US 12616578B2US-12616578-B2

Abstract

A reverse shoulder system can include, for example, a glenoid baseplate comprising a longitudinal axis, the glenoid baseplate further including a stem and a central channel within a sidewall of the stem. The stem can include a longitudinal axis. The longitudinal axis of the glenoid baseplate can be angled with respect to the longitudinal axis of the stem, wherein the longitudinal axis of the glenoid baseplate is not perpendicular with respect to the longitudinal axis of the stem. Other components including a glenosphere, tools, and methods of use are also disclosed.

Inventors

  • Donald E. Running
  • Robert J. Ball
  • Jason Slone

Assignees

  • Shoulder Innovations, Inc.

Dates

Publication Date
20260505
Application Date
20251205

Claims (20)

  1. 1 . A reverse shoulder implant, comprising: a baseplate configured to be secured to a glenoid of a scapular bone of a medical patient, the baseplate having a lateral end, a medial end, and a baseplate central channel extending through the baseplate from the lateral end to the medial end; a central screw configured to at least partially pass through the central channel; a locking nut having a cylindrical shape, and an external thread on an outside surface of the locking nut, the locking nut having a surface configured to engage a surface of the central screw when the central screw and baseplate are implanted within the medical patient, wherein the external thread is configured to couple the locking nut with the baseplate central channel; a glenosphere, having a lateral, convex articular surface, and a glenosphere central channel extending from the convex articular surface to an opposite side of the convex articular surface, wherein the glenosphere is configured to interface with the baseplate; and a glenosphere screw, sized to pass at least partially within the glenosphere central channel and sized to pass at least partially through the locking nut to couple the glenosphere to the baseplate.
  2. 2 . The reverse shoulder implant of claim 1 , wherein the glenosphere is configured to at least partially surround an external surface of the baseplate.
  3. 3 . The reverse shoulder implant of claim 1 , wherein the baseplate has a circular shape.
  4. 4 . The reverse shoulder implant of claim 1 , wherein the glenosphere is configured to surround the baseplate.
  5. 5 . The reverse shoulder implant of claim 1 , wherein the glenosphere is configured to be secured to the baseplate with a Morse taper.
  6. 6 . The reverse shoulder implant of claim 1 , wherein a diameter of the locking nut is greater than a length of the locking nut.
  7. 7 . The reverse shoulder implant of claim 1 , wherein the locking nut comprises a rotational control feature configured to receive a tool to enable twisting of the locking nut to secure it to the central screw.
  8. 8 . The reverse shoulder implant of claim 1 , wherein the central screw has a length of about 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, 10.5 mm, 11 mm, 11.5 mm, 12 mm, 12.5 mm, 13 mm, 13.5 mm, 14 mm, 14.5 mm, or 15 mm.
  9. 9 . The reverse shoulder implant of claim 1 , wherein the central channel defines a surface integral with the central screw.
  10. 10 . The reverse shoulder implant of claim 1 , wherein the central screw includes a rotational control feature.
  11. 11 . The reverse shoulder implant of claim 1 , wherein the central screw comprises a central channel configured to house a primary screw.
  12. 12 . The reverse shoulder implant of claim 1 , wherein the glenosphere is coupled indirectly to the baseplate.
  13. 13 . A reverse shoulder implant, comprising: a baseplate configured to be secured to a glenoid of a scapular bone of a medical patient, the baseplate having a lateral end, a medial end, and a baseplate central channel extending through the baseplate from the lateral end to the medial end; a central screw configured to at least partially pass through the central channel; a locking nut having a cylindrical shape, an external thread on an outside surface of the locking nut, the locking nut having a surface configured to engage a surface of the central screw when the central screw and baseplate are implanted within the medical patient, wherein the external thread is configured to engage the baseplate central channel; and a glenosphere, having a lateral, convex articular surface, and a glenosphere central channel extending from the convex articular surface to an opposite side of the convex articular surface, wherein the glenosphere is configured to interface with the baseplate; and a glenosphere screw, sized to pass at least partially within the glenosphere central channel and sized to pass at least partially through the locking nut.
  14. 14 . The reverse shoulder implant of claim 13 , wherein the glenosphere is configured to at least partially surround an external surface of the baseplate.
  15. 15 . The reverse shoulder implant of claim 13 , wherein the baseplate has a circular shape.
  16. 16 . The reverse shoulder implant of claim 13 , wherein the glenosphere is configured to surround the baseplate.
  17. 17 . The reverse shoulder implant of claim 13 , wherein the glenosphere is configured to be secured to the baseplate with a Morse taper.
  18. 18 . The reverse shoulder implant of claim 13 , wherein a diameter of the locking nut is greater than a length of the locking nut.
  19. 19 . The reverse shoulder implant of claim 13 , wherein the locking nut comprises a rotational control feature configured to receive a tool to enable twisting of the locking nut to secure it to the central screw.
  20. 20 . The reverse shoulder implant of claim 13 , wherein the central screw has a length of about 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, 10.5 mm, 11 mm, 11.5 mm, 12 mm, 12.5 mm, 13 mm, 13.5 mm, 14 mm, 14.5 mm, or 15 mm.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. application Ser. No. 19/294,160, filed on Aug. 7, 2025, which is a continuation of U.S. application Ser. No. 19/064,439, filed on Feb. 26, 2025, now U.S. Pat. No. 12,390,334, which is a continuation of U.S. application Ser. No. 18/761,202, filed on Jul. 1, 2024, now U.S. Pat. No. 12,268,611, which is a continuation of U.S. application Ser. No. 18/605,361, filed Mar. 14, 2024, now U.S. Pat. No. 12,023,254, which is a continuation of U.S. application Ser. No. 17/435,333, filed Aug. 31, 2021, which is the national phase of International Application No. PCT/US2020/022094, filed Mar. 11, 2020, which claims the benefit of priority from U.S. Provisional No. 62/816,708, filed Mar. 11, 2019, which are all hereby incorporated by reference in their entireties. BACKGROUND Shoulder replacement is a commonly performed medical procedure for treatment of osteoarthritis, rheumatoid arthritis, as well as for treatment of certain deformities related to oncological indications as well as trauma. There are two primary types of articulations available to surgeons for treatment: anatomic and reverse. With anatomic, the surgeon replaces the articular surfaces with industrial materials such that the articulating surfaces are substantially the same shape as the natural anatomy. A stem can be commonly fixed inside the canal of the humerus, a metallic articular head can be rigidly fixed to the proximal aspect of the same, the articular head having a convex articular surface adapted to articulate with the glenoid implant. The glenoid implant can include on its back side (medial side) certain pegs or posts or fins adapted to be rigidly fixed within the glenoid fossa of the scapula and on its front side a concave or flat articular surface adapted to articulate with the humeral head of the humeral implant. When a reverse prosthesis is used, the articular surface is reversed in that the metallic ball is rigidly fixed to the glenoid fossa of the scapula, and the concave articular surface is rigidly fixed to the humeral bone, thereby reversing the fashion of articulation of the prosthesis. The surgeon chooses between the two types of prostheses by assessing a number of conditions of the patient including level of pain, patient activity level, deformity or severity of the boney degradation, the strength of surrounding soft tissues, and present or absence of prior surgery, and particularly the health and strength of the rotator cuff muscle and tendon. Disease of the rotator cuff is common among patients with arthritis of the shoulder. In this circumstance, it is commonly observed that the absence of insufficiency of the rotator cuff leads to a condition where the anatomic shoulder replacement prosthesis is not sufficiently stabilized by surrounding soft tissue. In this case, a reverse shoulder replacement prosthesis can be preferred in some cases due to the higher inherent stability of the articulation. In addition, the reverse prosthesis can advantageously utilize the remaining muscles in a way they can be more effective in the absence of the other soft tissue structures by adjusting the position of the articular surfaces within the joint. SUMMARY In some embodiments, disclosed herein is a reverse shoulder system, comprising any number of a glenoid baseplate comprising a longitudinal axis, the glenoid baseplate further comprising a stem and a central channel within a sidewall of the stem, the stem comprising a longitudinal axis. The longitudinal axis of the glenoid baseplate can be angled with respect to the longitudinal axis of the stem, wherein the longitudinal axis of the glenoid baseplate is not perpendicular with respect to the longitudinal axis of the stem. In some configurations, the glenoid baseplate comprises a generally disc-shaped portion extending radially outward from the central channel. In some configurations, the stem comprises a sidewall that extends superiorly with respect to the disc portion. In some configurations, the glenoid baseplate comprises a peripheral edge. In some configurations, the peripheral edge comprises spaced-apart anti-rotation features. In some configurations, the anti-rotation features comprise slots. In some configurations, an inferior portion of the peripheral edge comprises a porous coating. In some configurations, an inferior surface of the generally disc-shaped portion comprises a porous coating, but a superior surface does not comprise a porous coating. In some configurations, the peripheral edge and/or an inferior surface of the baseplate comprises a conical geometry. In some configurations, an inferior surface of the baseplate is concave. In some configurations, the stem comprises a Morse taper lock superior to a superior-most portion of the generally disc-shaped portion of the glenoid baseplate. In some configurations, the system further comprises a glenosphere. In some configurations, the glenosphere comprises a