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US 10,869,707 B2Granted
Surgical fixation assemblies and methods of using the same
AssigneeK2M, Inc.
InventorLarry McClintock
Life of this patent
Estimating the term…
Abstract
A surgical fixation assembly includes a shank having an outer surface. The outer surface of the shank includes a threaded portion. The surgical fixation assembly includes a first cupped washer supported on the shank, a sleeve, and a nut threadably engaged with the threaded portion of the shank. The nut is positioned to slide the sleeve axially along the shank to deform the first cupped washer and enable the first cupped washer to penetrate osseous tissue for securing the shank to osseous tissue.
Claims20
A surgical fixation assembly, comprising:
- a shank having an outer surface, the outer surface of the shank including a threaded portion;
- a first washer supported on the shank defining a first central axis between a first end and a second end, the first washer having a first position and a second position deformed from the first position, wherein, in the first position, the first washer is cupped only about the first central axis;
- a second washer supported on the shank defining a second central axis between a first end and a second end, the second washer having a first position and a second position deformed from the first position, wherein, in the first position, the second washer is cupped only about the second central axis, the first central axis offset from the second central axis;
- a sleeve;
- and
- a nut threadably engaged with the threaded portion of the shank and positioned to slide the sleeve axially along the shank to deform the first washer and enable the first washer to penetrate osseous tissue for securing the shank to osseous tissue in the second position.
3 more elements
A method for securing a shank to osseous tissue, the method comprising:
- inserting a shank into a hole into osseous tissue;
- rotating a nut about the shank to drive a sleeve supported on the shank distally;
- deforming a first cupped washer supported on the shank as the sleeve slides along the shank to radially expand the first cupped washer from a first position to a second position in which the first cupped washer defines a first shorter dimension and a first longer dimension and expands into osseous tissue for securing the shank to osseous tissue;
- and
- deforming a second cupped washer on the shank as the sleeve slides along the shank to radially expand the second cupped washer from a first position to a second position in which the second cupped washer defines a second shorter dimension and a second longer dimension and expands into osseous tissue for securing the shank to osseous tissue, the first longer dimension being oriented transverse to the second longer dimension.
2 more elements
A surgical fixation assembly, comprising:
- a shank having an outer surface, the outer surface of the shank including a threaded portion;
- a first cupped washer supported on the shank, the first cupped washer having a first position and a second position deformed from the first position, wherein, in the second position, the first cupped washer defines a first shorter dimension and a first longer dimension;
- a second cupped washer supported on the shank, the second cupped washer having a first position and a second position deformed from the first position, wherein, in the second position, the second cupped washer defines a second shorter dimension and second longer dimension, the first longer dimension being oriented transverse to the second longer dimension;
- a sleeve;
- and
- a nut threadably engaged with the threaded portion of the shank and positioned to slide the sleeve axially along the shank to deform the first cupped washer and the second cupped washer, and enable the first cupped washer to penetrate osseous tissue for securing the shank to osseous tissue.
3 more elements
Dependencies are inferred from the claim text.