Method and apparatus for fixing a graft in a bone tunnel
View Patent ↗A method for fixing a bone block in a bone tunnel comprising the steps of placing the bone block in the bone tunnel, advancing spaced-apart first and second metal wires through the bone, transversely of the bone tunnel, so as to intersect the bone block and extend through the bone block, removing one of the wires and replacing the one removed wire with a first absorbable rod, and removing the other of the wires and replacing the other removed wire with a second absorbable rod, whereby to retain the bone block in the bone tunnel with the absorbable rods.
1. A crosspin comprising:
a distal portion for engaging bone forming a far wall of a bone tunnel;
a proximal portion for engaging bone forming a near wall of the bone tunnel; and
an intermediate portion;
said distal portion comprising a smooth-walled cylindrically shaped portion having a point at a first end thereof and a first notch at a second end thereof formed therein for encouraging bone ingrowth and preventing crosspin migration, the first notch having a rectangular cross-section to define two circumferential substantially right angle edges extending completely around a circumference of the crosspin;
said proximal portion comprising a smooth-walled cylindrical portion having a second notch formed therein, the second notch having a rectangular cross-section to define two circumferential substantially right angle edges extending completely around the circumference of the crosspin, the proximal portion extending from the second notch to and including a proximal end of the crosspin; and
said intermediate portion extends from the first notch to the second notch, is of cylindrical configuration in cross-section, and is smooth-walled throughout the extent thereof, so as to provide a full cross-section for maximum load-bearing strength,
said distal portion, and said proximal portion, and said intermediate portion are of equal outer diameters, and
said crosspin is of an absorbable material and is configured to crosspin a graft ligament in a bone tunnel.
2. A crosspin according to claim 1 wherein said notch has an arcuate cross-section.
3. A crosspin according to claim 1 wherein said notch has a V-shaped cross-section.
4. A crosspin according to claim 1 , said distal portion and said proximal portion having a plurality of notches formed therein.
5. A crosspin according to claim 4 wherein said distal portion and said proximal portion each have a plurality of notches formed therein.
6. The crosspin in accordance with claim 1 wherein a cross-section of each of the notches is a selected one of rectangular, arcuate, and v-shaped.