Locking Intramedullary Nail System
AssigneeCidaris Ortho, Inc.
InventorsThomas E. Rushton, Kevin R. Desmond, Mark J. Warburton
Life of this patent
Estimating the term…
Abstract
An intramedullary (IM) nail system for the fixation of fractured bones in a patient comprising a nail and compression screws. The length of the body is divided into a distal section and a proximal section with the distal section containing multiple interference sections having a diameter less or greater than that of the body. The threads adjacent the nail head have an apex generally greater than the diameter of the body. The compression screws are dimensioned to be inserted through the bone and contact the nail, pressing it against the bone canal. The nail, once inserted, lies below the surface of the bone.
Claims20
An intramedullary (IM) nail system for the fixation of fractured bones in a patient comprising:
- a nail, said nail having:
- a body having:
- a proximal end, said proximal end having a head and a driver receiving area,
- a threaded section, said threaded section being adjacent said head,
- a distal end,
- a length, said length having a proximal section and a distal section,
- a body diameter,
- multiple interference areas in said distal section, said multiple interference areas providing a disturbance in said length,
- multiple screws,
- wherein said nail is inserted into an end of a first bone and extends into a second bone and is maintained within said first bone and said second bone by said screws inserted into said first bone and said second bone at an angle to said nail to contact at least one of said multiple interference areas and lock said nail against bone canal to prevent rotation and longitudinal movement, and
- wherein said head lies below the plane of the surface of the bone.
An intramedullary (IM) nail system for the fixation of fractured bones in a patient comprising:
- a nail, said nail having:
- a body having:
- a proximal end, said proximal end having a head,
- a threaded section, said threaded section being adjacent said head and having an apex greater that a body diameter,
- a distal end,
- a length, said length having a proximal section and a distal section,
- a body diameter,
- multiple grooves in said distal section, said multiple grooves having a groove diameter of 15% less than said body diameter and spaced from said distal end and from adjacent grooves at least 5 mm (0.196 in),
- multiple screws,
- wherein said nail is inserted into an end of a first bone and extends into a second bone to retain bone length and is maintained within said first bone and said second bone by said screws inserted into said first bone and said second bone at an angle to said nail to contact at least one of said multiple grooves and lock said nail against bone canal to prevent rotation and longitudinal movement.
A method of securing a fracture in a patient and retain bone length using a nail system having a nail and retaining screws, comprising the steps of:
- drilling a whole in an end of a first bone,
- inserting a driver into a driver receiving area in a head of said nail,
- threading said nail through said fracture,
- reducing said fracture around said nail,
- drilling at least one hole at an angle to a distal end said nail through said bone,
- inserting a compression screw through said at least one hole to contact said nail,
- wherein said compression screw presses said nail against a canal of said bone and said head lies below the plane of the surface of said bone.
Dependencies are inferred from the claim text.