Deformable threaded locking structures, and related systems and methods

Patent metadata

Field	Value
Publication number	US-11944360-B2
Application number	US-202017062708-A
Country	US
Kind code	B2
Filing date	Oct 5, 2020
Priority date	Jun 11, 2019
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

A bone plate includes a plate body defining an outer surface, an opposed bone-facing surface, and a combination hole comprising a locking hole and a compression hole that intersect one another and each extending from the outer surface to the bone-facing surface. The locking hole and the compression hole extend away from each other along a longitudinal axis. The plate body further defines a locking surface that defines the locking hole, and a second surface that defines the compression hole. The locking surface further defines a plurality of columns sequentially located about a central axis of the locking hole, a plurality of recesses located, respectively, between at least some of the columns, and plate threads that traverse each of the columns. Crests of the plate threads extend linearly from a first side of each column to a second side of each column.

First claim

What is claimed:

1. A bone plate, comprising:
a plate body that defines a combination hole comprising a locking hole and a compression hole that intersect one another and each extends from an outer surface of the plate body to a bone-facing surface of the plate body, wherein the locking hole and the compression hole extend away from each other along a longitudinal axis,
the plate body further defining 1) a locking surface that defines the locking hole, 2) a second surface that defines the compression hole, and 3) interface edges along an intersection boundary between the locking surface and the second surface;
wherein the locking surface further defines:
first, second, and third columns sequentially located about a central axis of the locking hole, each column having a first side and a second side;
a first recess extending from the second side of the first column to the first side of the second column;
an additional recess extending from the second side of the third column to the first side of the first column;
a transition zone between the first side of the second column and the second side of the third column, wherein the locking surface in the transition zone is elongated and extends to the intersection boundary; and
plate threads that traverse each of the columns and at least portions of the first recess, the additional recess, and the transition zone, wherein crests of the plate threads extend linearly from the first side to the second side of each column.

2. The bone plate of claim 1 , wherein the longitudinal axis intersects the first column, and the second and third columns are substantially equidistantly spaced from the longitudinal axis with respect to a lateral direction perpendicular to the longitudinal axis.

3. The bone plate of claim 2 , wherein:
each column defines a crest trajectory axis that intersects the crest of each fully formed plate thread in the column, such that the crest trajectory axes of the first, second, and third columns are 1) substantially equidistantly spaced from the central axis, and 2) located at substantially equivalent intervals about the central axis; and
in a reference plane orthogonal to the central axis, the crest trajectory axes of the first, second, and third columns are spaced from the central axis at a substantially equivalent radial distance measured along a radial direction perpendicular to the central axis.

4. The bone plate of claim 3 , wherein the crest trajectory axes are linear and are each oriented at an angle in a range of about 5 degrees to about 30 degrees relative to the central axis.

5. The bone plate of claim 3 , wherein each column defines a column length measured from the first side to the second side along a respective direction perpendicular to the radial direction in the reference plane, the column lengths of the second and third columns are equivalent, and the column length of the first column is different than the column lengths of the second and third columns.

6. The bone plate of claim 5 , wherein a ratio of the column length of the first column to the column lengths of the second and third columns is in a range of about 1:2 to about 1:15.

7. The bone plate of claim 6 , wherein the ratio of the column length of the first column to the column lengths of the second and third columns is in a range of about 1:5 to about 1:8.

8. The bone plate of claim 6 , wherein the second and third columns extend to the intersection boundary.

9. The bone plate of claim 3 , wherein the locking surface further defines transition portions extending respectively from the second and third columns to the intersection boundary, and the transition portions are located opposite each other along the lateral direction and are arcuately convex and define transition radii, such that a ratio of the radial distance to the transition radii is in a range of about 1:2.1 to about 1:2.7 in the reference plane.

10. The bone plate of claim 3 , wherein the radial distance is less than a minimum distance measured from the central axis to the intersection boundary with respect to a longitudinal direction oriented along the longitudinal axis.

11. The bone plate of claim 10 , wherein:
the plate threads define fully formed thread profiles that include the crests and further include roots and flanks that extend from the roots to the crests;
at least some of the plate threads extend to the intersection boundary such that the interface edges on both sides of the longitudinal axis with respect to the lateral direction include edges of the fully formed thread profiles.

12. The bone plate of claim 11 , wherein the plate threads traverse the locking surface such that a thread height measured from the crest to the root is substantially constant along at least one partial revolution about the central axis from the intersection boundary on one side of the longitudinal axis to the intersection boundary on the opposite side of the longitudinal axis.

13. A bone plate, comprising:
a plate body that defines an outer surface, a bone-facing surface opposite the outer surface, and a combination hole comprising a locking hole and a compression hole that intersect one another and each extending from the outer surface to the bone-facing surface, wherein the locking hole and the compression hole extend away from each other along a longitudinal axis,
the plate body further defining 1) a locking surface that defines the locking hole, and 2) a second surface that defines the compression hole;
wherein the locking surface further defines:
a plurality of columns sequentially located about a central axis of the locking hole in a polygonal pattern;
a plurality of recesses located, respectively, between at least some of the columns; and
plate threads that traverse each of the columns, wherein crests of the plate threads extend linearly from a first side of each column to a second side of each column; and

wherein:
the plate body defines an intersection boundary between the locking surface and the second surface, and a first portion of the intersection boundary on a first side of the longitudinal axis is separated from a second portion of the intersection boundary on a second side of the longitudinal axis by a gap that is open to the locking hole and the compression hole;
the longitudinal axis intersects a first column of the plurality of columns and extends centrally through the gap; and
the plurality of columns further comprises second and third columns, wherein the second and third columns are substantially equidistantly spaced from the longitudinal axis with respect to a lateral direction perpendicular to the longitudinal axis.

14. The bone plate of claim 13 , wherein:
the plate threads define fully formed thread profiles that include the crests and further include roots and flanks that extend from the roots to the crests;
at least some of the plate threads extend to the intersection boundary such that interface edges between the locking surface and the second surface along the first and second portions of the intersection boundary include edges of the fully formed thread profiles.

15. The bone plate of claim 14 , wherein the plate threads traverse the locking surface such that a thread height measured from the crest to the root is substantially constant along at least one partial revolution about the central axis from the second portion of the intersection boundary to the first portion of the intersection boundary.

16. The bone plate of claim 13 , wherein the bone plate is formed of a material selected from the group comprising stainless steel, titanium, a titanium-aluminum-ni

Assignees

• Depuy Synthes Products Inc

Inventors

• Oberli Joel
• Aebi This
• Rocci Mirko
• Menze Johanna F
• Ghammar Said

Classifications

• A61B17/8014 Primary

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

• A61B17/8057 Primary

  the interlocking form comprising a thread · CPC title

• A61B2017/00862

  elastic or resilient · CPC title

• A61B17/866

  Material or manufacture · CPC title

• A61B17/8605

  Heads, i.e. proximal ends projecting from bone · CPC title