Bone Plates And Associated Screws
AssigneeStryker European Operations Limited
InventorsManoj Kumar Singh, Subash K. Mannanal, Robert Dominik, Pierre-Luc Sylvestre, Andreas Wiederkehr
Life of this patent
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Abstract
A bone plate includes a bone-contacting surface, an upper surface opposite the bone-contacting surface, and a hole having a circumference and extending from the upper surface to the bone-contacting surface. The hole includes a first portion having a plurality of substantially parallel lips, each lip extends around the circumference of the hole and defines a diameter of the hole. The diameters of the hole, as defined by the lips, decrease in a direction from the upper surface to a center of the hole and increase in a direction from the center of the hole toward the bone-contacting surface.
Claims20
A method for securing a first screw to a bone plate, comprising the steps of:
- inserting a shaft of the first screw through the bone plate from an upper surface of the bone plate to a bone-contacting surface of the bone plate,
- contacting at least one of a plurality of screw-engaging members in the bone plate with a head of the first screw, the screw-engaging members defining a converging-diverging profile and extending between an intermediate surface and the bone-contacting surface, the intermediate surface disposed between the upper surface and the bone-contacting surface;
- plastically deforming at least one of the plurality of screw-engaging members with threads of the head to form an interference connection between the first screw and the bone plate;
- and
- advancing the first screw until a portion of the head is positioned between to the upper surface and the bone contacting surface of the bone plate.
A method for securing a screw to a bone plate, comprising the steps of:
- selecting the screw from a plurality of screws;
- inserting a shaft of the screw through the bone plate from an upper surface of the bone plate to a bone-contacting surface of the bone plate,
- contacting at least one of a plurality of screw-engaging members in the bone plate with a head of the screw, the plurality of screw-engaging members being spaced around a circumference of a hole and defining a converging-diverging profile that extends from an intermediate surface towards the bone-contacting surface, wherein the intermediate surface is spaced apart from the upper surface and is perpendicular to the central axis of the hole;
- and
- securing the screw to the bone plate by plastically deforming at least one of the plurality of screw-engaging members with the head of the screw.
A method for securing a screw to a bone plate, comprising the steps of:
- selecting an insertion angle of the screw from a plurality of insertion angles;
- inserting a shaft of the screw through the bone plate from an upper surface of the bone plate to a bone-contacting surface of the bone plate and along the selected insertion angle;
- contacting at least one of a plurality of screw-engaging members in the bone plate with a head of the screw, the plurality of screw-engaging members being spaced around a circumference of a first hole and defining a converging-diverging profile that extends from an intermediate surface along a central axis of the first hole, wherein the intermediate surface is disposed between the upper surface and the bone-contacting surface;
- and
- plastically deforming at least one of the plurality of screw-engaging members with threads defined by the head of the screw.
Dependencies are inferred from the claim text.