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US 2019/0290338 A1Published application
Bone plate with form-fitting variable-angle locking hole
AssigneeDePuy Synthes Products, Inc.
InventorsSimon Bosshard, Jesse Rush, Michael McGurk, Christopher Keegan
Life of this patent
Estimating the term…
Abstract
A bone plate includes at least one variable angle locking hole that is configured to threadedly mate with a variable angle locking screw oriented so as to define any angle among a range of angles with respect to a central axis of the VA locking hole at which a threaded head of the locking screw is configured to threadedly purchase with the bone plate in the variable angle locking hole.
Claims20
A bone plate comprising:
- an inner surface configured to face the underlying bone, and an outer surface opposite the inner surface;
- and
- an internal surface that extends from the outer surface to the inner surface so as to define a hole that is oriented along a central hole axis, wherein the internal surface includes 1) a plurality of threaded regions that define respective columns of thread segments, and 2) a plurality of recessed surfaces that are disposed between respective adjacent ones of the thread segments, the recessed surfaces being offset radially outward with respect to the columns of thread segments,
- wherein the bone plate is configured to mate with a threaded head of a variable angle locking screw in the hole at an angle within a range of angles, such that the threaded head threadedly purchases with all of the columns of thread segments, and wherein the angle is oblique to the central hole axis.
1 more element
A method of fixing a bone plate to an underlying bone, comprising the steps of:
- placing a bone plate adjacent the underlying bone such that an inner surface of the bone plate faces the underlying bone and an outer surface of the bone plate faces away from the underlying bone, wherein the bone plate defines a hole that extends along a central hole axis from the outer surface to the inner surface;
- inserting a shaft of a variable angle locking screw through the hole of the bone plate at an angle oblique to the central hole axis so as to threadedly purchase into the underlying bone, wherein the hole is defined by an internal surface of the bone plate that includes a plurality of columns of thread segments and a corresponding plurality of recesses interposed circumferentially between respective adjacent ones of the columns;
- and
- threadedly mating the variable angle locking screw with the bone plate inside the hole such that a threaded head of the variable angle locking screw threadedly purchases with all of the plurality of columns while the shaft is oriented at the angle oblique to the central hole axis.
1 more element
Dependencies are inferred from the claim text.