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US 7,621,913 B2Granted
Interlocking intramedullary nails with outer screw
OwnerElliot Charles Semetinventor
Life of this patent
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Abstract
A new method for locking Intramedullary Nails (IM Nails) using a headless screw for performing interlocking with the nail. A subsequent, canulated outer screw is placed in such a way that it encapsulates this headless screw. The outer screw locks to the IM Nail and holds the headless screw in place to eliminate play in the screw-nail interface and results in a more stable form of fixation.
Claims1
A method for securing an intramedullary nail to a fractured bone comprising the steps of:
- (a) Inserting a headless screw into the intramedullary nail;
- (b) Tightening the headless screw to the intramedullary nail by means of a screwdriver that remains in place after tightening;
- (c) Inserting a canulated drill bit over the headless screw;
- (d) Using the canulated drill bit to create threads on the inside of the intramedullary nail;
- (e) Inserting a second screw over the screwdriver and headless screw and tightening the second screw to the threads on the inside of the intramedullary nail;
- and
- (f) Repeating steps a to e contra laterally as necessary until the intramedullary nail is secured to the fractured bone.
4 more elements
Dependencies are inferred from the claim text.