Periprosthetic bone plate systems

Patent metadata

Field	Value
Publication number	US-12558134-B2
Application number	US-202017772319-A
Country	US
Kind code	B2
Filing date	Oct 29, 2020
Priority date	Oct 29, 2019
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

Periprosthetic bone fixation plates are disclosed including, for example, periprosthetic proximal femur plate, periprosthetic distal femur plate, periprosthetic humerus plate, periprosthetic ring plate, and periprosthetic troch plate. In use, the periprosthetic bone fixation plates are arranged and configured for use in periprosthetic fractures. That is, the periprosthetic plates include one or more features to facilitate positioning and securement of the bone fixation plate to a patients bone that previously received a surgically implanted orthopedic device or implant such as, for example, an intramedullary nail, a hip prosthesis, a knee prosthesis, etc. In use, the one or more features are designed and configured to facilitate avoidance of the previous surgically implanted orthopedic device or implant. In addition, the periprosthetic bone fixation plates are arranged and configured to facilitate plating of a longer working length as compared to existing bone fixation plates (e.g., plating from, for example, femoral condyle to greater trochanter).

First claim

We claims:

1 . A periprosthetic bone plate comprising:
a head portion; and a shaft portion including an upper surface, a lower surface, a central longitudinal axis, and an outer periphery surface, the shaft portion further including: a plurality of threaded locking screw openings arranged and configured to receive a plurality of locking screws, respectively, for securing the bone plate to a patient's bone; and a plurality of variable angled fastener openings arranged and configured to receive a plurality of variable angled screws, respectively, for securing the bone plate to the patient's bone; wherein the plurality of variable angled fastener openings are positioned along the outer periphery surface of the shaft portion while the plurality of locking screw openings are positioned closer to the central longitudinal axis of the shaft portion; and wherein the plurality of variable angled fastener openings and the plurality of locking screw openings form a plurality of groups, each of the plurality of groups comprising a triangular configuration on the upper surface of the bone plate such that a locking screw opening of the plurality of locking screw openings is positioned in-between adjacent variable angled fastener openings on two of the three sides of each of the triangular configurations.

2 . The periprosthetic bone plate of claim 1 , wherein the plurality of threaded locking screw openings include a first diameter and the plurality of variable angled fastener openings include a second diameter, the first diameter being larger than the second diameter.

3 . The periprosthetic bone plate of claim 1 , further comprising a plurality of undercuts formed in the lower surface of the shaft portion of the bone plate, the plurality of undercuts extending laterally from a first lateral side to a second lateral side of the bone plate, the plurality of undercuts being coincident with the plurality of variable angled fastener openings so that a variable angled fastener opening is positioned within one of the plurality of undercuts.

4 . The periprosthetic bone plate of claim 1 , wherein an end portion of the shaft portion, opposite the head portion, includes thinning so that the end portion of the shaft portion includes a tapering cross-sectional area extending from the end portion towards the head portion, the tapering cross-sectional area being arranged and configured to enable contouring of the end portion of the shaft portion.

5 . The periprosthetic bone plate of claim 4 , wherein the plurality of locking screw openings formed in the end portion of the shaft portion include first and second distal locking screw openings, each of the first and second distal locking screw openings including a counterbore formed in the lower surface of the bone plate.

6 . The periprosthetic bone plate of claim 5 , further comprising one or more K-wire openings arranged and configured to enable a K-wire to pass therethrough, at least one of the one or more K-wire openings is positioned between the first and second distal locking screw openings.

7 . The periprosthetic bone plate of claim 1 , wherein the head portion of the periprosthetic bone plate includes a plurality of variable angled fastener openings and is devoid of any locking screw openings.

8 . The periprosthetic bone plate of claim 1 , wherein the head portion includes a plurality of locking screw openings and a plurality of variable angled fastener openings, the plurality of locking screw openings are more centrally located as compared to the plurality of the variable angled fastener openings.

9 . The periprosthetic bone plate of claim 1 , wherein the periprosthetic bone plate is selected from one of a proximal femur plate, a distal femur plate, a periprosthetic ring plate, a periprosthetic hook plate, and a humerus plate.

10 . A periprosthetic bone plate comprising:
a head portion; and a shaft portion including an upper surface, a lower surface, a central longitudinal axis, and an outer periphery surface, the shaft portion further including: a plurality of threaded locking screw openings arranged and configured to receive a plurality of locking screws, respectively, for securing the bone plate to a patient's bone; and a plurality of variable angled fastener openings arranged and configured to receive a plurality of variable angled screws, respectively, for securing the bone plate to the patient's bone; wherein the plurality of variable angled fastener openings are positioned along the outer periphery surface of the shaft portion while the plurality of locking screw openings are positioned closer to the central longitudinal axis of the shaft portion; and wherein the plurality of variable angled fastener openings and the locking screw openings define a zig-zag forming a line extending along a length of the shaft portion such that a locking screw opening of the plurality of locking screw openings is positioned in-between each pair of adjacent variable angled fastener openings along the zig-zag line.

11 . The periprosthetic bone plate of claim 10 , wherein the plurality of threaded locking screw openings include a first diameter and the plurality of variable angled fastener openings include a second diameter, the first diameter being larger than the second diameter.

12 . The periprosthetic bone plate of claim 10 , further comprising a plurality of undercuts formed in the lower surface of the shaft portion of the bone plate, the plurality of undercuts extending laterally from a first lateral side to a second lateral side of the bone plate, the plurality of undercuts being coincident with the plurality of variable angled fastener openings so that a variable angled fastener opening is positioned within one of the plurality of undercuts.

13 . The periprosthetic bone plate of claim 10 , wherein an end portion of the shaft portion, opposite the head portion, includes thinning so that the end portion of the shaft portion includes a tapering cross-sectional area extending from the end portion towards the head portion, the tapering cross-sectional area being arranged and configured to enable contouring of the end portion of the shaft portion.

14 . The periprosthetic bone plate of claim 13 , wherein the plurality of locking screw openings formed in the end portion of the shaft portion include first and second distal locking screw openings, each of the first and second distal locking screw openings including a counterbore formed in the lower surface of the bone plate.

15 . The periprosthetic bone plate of claim 14 , further comprising one or more K-wire openings arranged and configured to enable a K-wire to pass therethrough, at least one of the one or more K-wire openings is positioned between the first and second distal locking screw openings.

Assignees

• Smith & Nephew Inc
• Smith & Nephew Orthopaedics Ag
• Smith & Nephew Asia Pacific Pte Ltd

Inventors

• Rakes Jordan
• Zysk Adam
• Ritchey Nicholas S
• Bennett Charles R
• Watanabe Kohsuke
• Tornetta Paul
• Ricci William
• Firoozabadi Reza
• Watson John Tracy
• Mehta Samir
• Mcgrory Brian
• Babikian George

Classifications

• A61B17/8057 Primary

  the interlocking form comprising a thread · CPC title

• A61B17/8047

  wherein the additional element surrounds the screw head in the plate hole (A61B17/8052 takes precedence) · CPC title

• A61B17/8052

  immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded · CPC title

• A61B17/8014 Primary

  the extension or compression force being caused by interaction of the plate hole and the screws · CPC title

• A61B17/7059 Primary

  Cortical plates (A61B17/7007, A61B17/7058 take precedence) · CPC title