Jig with guide adapted to lock relative to both of threaded holes and non-threaded slots in a bone plate
A system, devices and methods are provided for facilitating stabilization of periarticular fractures. The system includes a compression plate and one or more of a cerclage cable for encircling the bone and securing the compression plate to the bone, a crimp lug for securing the cable in tension relative to the bone and/or a plate, and a supplemental plate coupled to the compression plate and adapted to receive bicortical or unicortical bone screws to further secure the compression plate relative to the bone. In addition, the system includes a cable tensioner for temporarily retaining the cable in tension and then applying a tension to the cable until a desired compression is effected between a plate and bone and while a cable retaining structure is secured to the cable to retain the applied tension on the cable. Also provided is a jig for use with plates for minimally invasive fracture stabilization.
1. A drill guide stably engagable relative to a bone plate, the bone plate having circular threaded screw holes and elongate non-threaded compression screw holes, each compression screw holes having a first width defined between elongate sides of the compression screw hole, the bone plate having a thickness as measured through a compression screw hole, said drill guide comprising:
a tubular member having a proximal end and a distal end, said distal end including,
a threaded portion;
a neck portion proximal said threaded portion and having a reduced diameter relative to said threaded portion, said neck portion having a maximum diameter greater than the first width;
a lip provided between the upper end of the threaded portion and the neck portion;
a shoulder provided at an upper end of the neck portion;
first and second opposing circumferential flats extending longitudinally through the threaded portion, lip, and neck portion, said flats displaced apart from each other by a distance which is less than the first width; and
a compression slot extending diametrically and longitudinally through said first and second flats, said compression slot extending transverse to a dimension of maximum diameter of said neck portion,
wherein said threaded portion is adapted to threadedly engage the plate at the threaded screw holes, and
wherein said flats can be rotationally oriented to extend between the sides of the compression screw hole, and then said drill guide can be rotated to cause the sides of the compression screw hole to compress said neck portion about the compression slot and said threaded portion to be disposed under the sides of the compression screw hole to thereby retain said drill guide relative to the plate at the compression screw hole.
2. A drill guide according to claim 1 , wherein:
said compression slot has a second width, and
said diameter of said neck portion exceeds the first width by no more than said second width.
3. A drill guide according to claim 1 , wherein:
said neck portion has a length sufficient to extend through the thickness of the plate.
4. A drill guide according to claim 1 , further comprising:
a collar provided about said proximal end of said tubular member.
5. A drill guide according to claim 4 , wherein:
said collar includes an axial recess for a torque driver to apply torque to said drill guide.
6. A drill guide stably engagable relative to a bone plate, the bone plate having elongate non-threaded compression screw holes each having a first width defined between elongate sides of the compression screw hole, the bone plate having a thickness as measured through a compression screw hole, said drill guide comprising:
a tubular member having a proximal end and a distal end, said distal end including,
a distalmost portion;
a neck portion proximal said a distalmost portion and having a reduced diameter relative to said a distalmost portion, said neck portion having a maximum diameter greater than the first width;
a lip provided between the upper end of the distalmost portion and the neck portion;
a shoulder provided at an upper end of the neck portion;
first and second opposing circumferential flats extending longitudinally through the distalmost portion, lip, and neck portion, said flats displaced apart from each other by a distance which is less than the first width; and
a compression slot extending diametrically and longitudinally through said first and second flats, said compression slot extending transverse to a dimension of maximum diameter of said neck portion,
wherein said flats can be rotationally oriented to extend between the sides of the compression screw hole, and then said drill guide can be rotated to cause the sides of the compression screw hole to compress said neck portion about the compression slot and said distalmost portion to be disposed under the sides of the compression screw hole to thereby retain said drill guide relative to the plate at the compression screw hole.
7. A drill guide according to claim 6 , wherein:
said compression slot has a second width, and
said diameter of said neck portion exceeds the first width by no more than said second width.
8. A drill guide according to claim 6 , wherein:
said neck portion has a length sufficient to extend through the compression screw holes of the plate.
9. A drill guide according to claim 6 , further comprising:
a collar provided about said proximal end of said tubular member.
10. A drill guide according to claim 9 , wherein:
said collar includes an axial recess for a torque driver to apply torque to said drill guide.