Variable angle orthopedic fasteners for fixation of an orthopedic implant
AssigneeMcGinley Engineered Solutions, LLC
InventorsJoseph C. McGinley, Vincent Palazzolo, Ben Warren, Adam Johnson
Life of this patent
Estimating the term…
Abstract
Systems for variable angle insertion of surgical fasteners relative to an orthopedic plate with locking of the surgical fastener relative to the plate upon insertion. The systems may include a pivot member secured relative to either the orthopedic plate or the fastener. In either regard, the pivot member may provide locking engagement with the plate to lockingly engage the fastener relative to the plate.
Claims13
An orthopedic fastener assembly for use in fixation of an orthopedic plate to a bone of a patient, the assembly comprising:
- a fastener comprising:
- an elongate portion on a distal portion of the fastener comprising threads for engagement with a bone of a patient, and
- a non-circular head portion at a proximate portion of the fastener;
- and
- a pivot member comprising a bore defining a reference axis and having a non-circular contoured surface disposed about and pivotally displaceable relative to the head portion for pivotal articulation of the pivot member about the head portion, the pivot member comprising a first locking feature to lockingly engage the pivot member to the orthopedic plate through which the fastener has been advanced, the fastener extending along a fastener insertion axis, wherein prior to an engagement with the orthopedic plate, the pivot member is moveable relative to the head portion and secured thereto to prevent removal of the pivot member from the head portion, and wherein the pivotal articulation of the pivot member about the head portion defines an included angle between the reference axis and the fastener insertion axis;
- wherein the non-circular contoured surface and the non-circular head portion interface to restrict rotation of the pivot member about the fastener insertion axis.
An orthopedic fastener assembly for use in fixation of an orthopedic plate to a bone of a patient, the assembly comprising:
- a fastener comprising:
- an elongate portion on a distal portion of the fastener comprising threads for engagement with a bone of a patient, and
- a head portion at a proximate portion of the fastener;
- and
- a pivot member comprising a bore defining a reference axis and having a contoured surface circumferentially arcuate about the bore and disposed about and pivotally displaceable relative to the head portion for pivotal articulation of the pivot member about the head portion, the pivot member comprising a first locking feature comprising a ramped surface to lockingly engage the pivot member to a second locking feature comprising a shoulder on a sidewall of an aperture through the orthopedic plate through which the fastener has been advanced, the ramped surface rotationally displaceable relative to the shoulder to lockingly engage the pivot member relative to the plate,
- wherein prior to an engagement with the orthopedic plate, the pivot member is rotatable about the head portion about a fastener insertion axis and secured thereto to prevent removal of the pivot member from the head portion, and
- wherein the pivotal articulation of the pivot member about the head portion defines an included angle between the reference axis and the fastener insertion axis.
Dependencies are inferred from the claim text.