Bone screw and method of manufacture
AssigneeWarsaw Orthopedic, Inc.
InventorsDale A. Tempco, Rodney Ray Ballard, Keith E. Miller, William Alan Rezach
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Abstract
A bone screw comprising a shaft having a wall, the wall including a minor diameter and at least one thread having an external thread form. The thread form including a first portion comprising a crest of the thread form and a second portion extends between a minor diameter of the thread form and the first portion. The first portion having a solid configuration relative to the second portion. In some embodiments, systems, spinal constructs, surgical instruments and methods are disclosed.
Claims20
A bone screw comprising a shaft having a proximal portion and a distal portion, the distal portion having a taper, the shaft including a surface and a wall with a thickness, the wall defining a plurality of spaced apart struts and lattices positioned between the struts, the struts having a solid surface relative to the lattices, an external thread extending outwardly from the surface, the wall extending about a core.
A bone screw comprising:
- a shaft extending along a longitudinal axis between opposite proximal and distal ends, the proximal end comprising a substantially spherical head, the distal end having a taper and comprising an inner core and a wall extending about the core, threads extending from the wall, the threads being intermittent, staggered, or discontinuous, the wall defining a plurality of spaced apart struts and lattices positioned between the struts, the struts having a solid surface relative to the lattices.
A screw assembly comprising a shaft extending along a longitudinal axis between opposite proximal and distal ends, the proximal end comprising a substantially spherical head, the distal end comprising a core and a wall extending about the core, external threads extending from the wall, the wall defining a plurality of spaced apart struts and lattices positioned between the struts, the struts having a solid surface relative to the lattices;
- and
- an implant receiver connectable with the head.
Dependencies are inferred from the claim text.