Orthopedic screw
AssigneeAlphatec Spine, Inc.
InventorWilliam Reimels
Life of this patent
Estimating the term…
Abstract
An orthopedic screw having a shaft and a thread ribbon is provided. The shaft includes a proximal driving end and a distal end. The thread ribbon extends around the shaft and including a base portion that is rigidly attached to the shaft and a flange portion that is resilient. The flange portion extends away from the shaft at a preset angle to form a preset outer thread diameter in a preset configuration. The flange portion extends away from the shaft at a second angle greater than the preset angle to form a second outer thread diameter greater than the preset outer thread diameter when the orthopedic screw is subjected to a pull out force.
Claims20
An orthopedic screw comprising:
- a shaft having a proximal driving end and a distal end;
- and
- a thread ribbon extending around the shaft and including a base portion that is rigidly attached to the shaft and a flange portion that is resilient,
- the flange portion extends away from the shaft at a preset angle to form a preset outer thread diameter in a preset configuration;
- and
- the flange portion extends away from the shaft at a second angle greater than the preset angle to form a second outer thread diameter greater than the preset outer thread diameter when the orthopedic screw is subjected to a pull out force.
Dependencies are inferred from the claim text.