Method of endosteal nailing
View Patent ↗The system includes an elongate intramedullary nail which is rigidly fixed under compression to the endosteal surface of a bone with unicortical locking machine screws inserted through the bone and into a plurality of longitudinally displaced threaded holes in the nail. A jig is provided for drilling holes through the bone in alignment with the screw holes in the nail. The nail and jig each include anti-rotation structure at which the nail and jig can be coupled together in a fixed alignment. A method is also provided for implanting an intramedullary nail on two sides of a bone fracture, and clamping the bone with sufficient force to immobolize the fracture by forcing the implant against an endosteal surface of the bone and applying a compressive force against the outer surface of the bone.
1. A method of implanting an intramedullary nail into a medullary canal of a fractured bone, the nail having a length, the fracture demarcating the bone into first and second bone portions, said method comprising:
a) introducing at least half the length of the nail into the medullary canal of the first portion of the bone, the nail having a plurality of threaded screw holes;
b) reducing the fractured bone, wherein once the fracture is reduced substantially the entirety of the nail is within the medullary canal;
c) coupling a jig to a first location on the nail;
d) using the jig to drill holes through the bone in alignment with some of the threaded screw holes;
e) providing screws having a shaft with machine threads and a head;
f) introducing the shafts of the screws through the holes drilled in the bone and into the screw holes and rotating the screws to cause clamping of the bone between the heads of the screws and the nail;
g) decoupling the jig from the nail;
h) coupling the jig at a second location on the nail longitudinally displaced from the first location;
i) using the jig to drill holes through the bone in alignment with the remainder of the threaded screw holes;
j) decoupling the jig from the nail; and
k) introducing the shaft of the screws through the holes drilled in the bone and into the remainder of the screw holes.
2. A method according to claim 1 , further comprising:
after said reducing the fracture, moving the nail within the medullary canal such that relatively equal lengths of the nail are located on each side of the fracture.
3. A method according to claim 1 , further comprising:
prior to said introducing, coupling the jig to the nail, and manipulating the nail relative to the bone with the jig.
4. A method according to claim 3 , further comprising:
prior to said reducing the fracture, coupling the jig to the nail, and manipulating the nail relative to the bone with the jig.
5. A method of implanting an intramedullary nail into a medullary canal of a fractured bone, the fracture demarcating the bone into first and second bone portions, said method comprising:
a) introducing the nail into the medullary canal of the bone, the nail having a plurality of threaded screw holes located under the first and second bone portions;
b) coupling a jig to a first location on the nail;
c) using the jig to drill holes through the first bone portion in alignment with at least one of the threaded screw holes;
d) providing screws having a shaft with machine threads and a head;
e) introducing the shafts of the screws through the holes drilled in the bone and into the screw holes and rotating the screws to cause clamping of the bone between the heads of the screws and the nail;
f) decoupling the jig from the nail;
g) coupling a jig at a second location on the nail longitudinally displaced from the first location;
h) reducing the fractured bone, wherein once the fracture is reduced substantially the entirety of the nail is within the medullary canal;
i) using the jig to drill holes through the second bone portion in alignment with threaded screw holes thereunder; and
j) introducing the shaft of the screws through the holes drilled in the second bone portion and into the screw holes thereunder.
6. A method according to claim 5 , wherein:
the same jig is used for steps b) and g).
7. A method according to claim 5 , wherein:
said coupling a jig to a first location on the nail includes coupling a jig to a longitudinal center of the nail.
8. A method according to claim 5 , wherein:
said coupling a jig to a first location on the nail includes coupling a jig between the first and second bone locations.
9. A method according to claim 5 , wherein:
said using the jig to drill holes through the second bone portion is performed while the reduced fracture is held in compression.