Materials and methods for improved bone tendon bone transplantation
View Patent ↗Disclosed herein is an improved Bone Tendon Bone graft for use in orthopedic surgical procedures. Specifically exemplified herein is a Bone Tendon Bone graft comprising one or more bone blocks having a groove cut into the surface thereof, wherein said groove is sufficient to accommodate a fixation screw. Also disclosed is a method of harvesting grafts that has improved efficiency and increases the quantity of extracted tissue and minimizes time required by surgeon for implantation.
1. A recovered and cleaned pre-shaped human allograft implant comprising:
at least one bone block adapted before surgery for fixation in a bone tunnel having a tunnel diameter;
said bone block pre-shaped before surgery as a pre-shaped dowel bone block having a dowel diameter specially adapted for fixation in a bone tunnel having said tunnel diameter;
and
a natural insertion of a first human tendon into said first human bone block,
wherein said natural insertion occurs between one of the following bone-tendon pairs,
a. patellar bone and patellar tendon,
b. patellar bone and quadriceps tendon,
c. tibial bone and patellar tendon, or
d. calcaneus bone and Achilles tendon;
and wherein said first human tendon runs along at least a portion of the length of said first human bone block and said first human tendon forms at least a portion of an outer surface of said first human bone block; wherein the portion of the outer surface maintains essentially the same contour as the rest of said first human bone block; and
further wherein said human allograft implant has been treated to minimize the level of antigenic agents and/or potentially pathogenic agents present in the graft.
2. The pre-shaped human allograft implant of claim 1 , wherein said first human bone block comprises a human calcaneal bone block in a pre-shaped dowel form with no groove thereon and wherein said natural insertion comprises a natural insertion of the human Achilles tendon into said human calcaneal bone block, and wherein said first human tendon comprises a human Achilles tendon portion derived from a naturally occurring human Achilles tendon.
3. The pre-shaped human allograft implant of claim 1 , wherein said first human bone block comprises a human tibial bone block in a pre-shaped dowel form with no groove thereon and wherein said natural insertion comprises a natural insertion of the human patellar tendon into said human tibial bone block, and wherein said first human tendon comprises a human patellar tendon portion derived from a naturally occurring human patellar tendon, said human patellar tendon portion further naturally attached to a human patellar bone block.
4. The pre-shaped human allograft implant of claim 1 , wherein said patellar tendon, or said quadriceps tendon or said Achilles tendon is hemisected.
5. The pre-shaped human allograft implant of claim 4 , wherein said bone block has at least one side that is cut substantially even with the tendon.
6. The pre-shaped human allograft implant of claim 1 , wherein said first human bone block is a pre-shaped cylindrical dowel form with no groove thereon.
7. The pre-shaped human allograft implant of claim 1 , wherein said first human bone block is tapered.
8. The pre-shaped human allograft implant of claim 1 , wherein said first human bone block is not tapered.
9. A recovered and cleaned pre-shaped human allograft implant comprising:
a human tibial bone block in a pre-shaped dowel,
a human patellar tendon portion and
a human patellar bone block in a pre-shaped dowel;
wherein said human patellar tendon portion is naturally attached to said human tibial bone block and said human patellar bone block,
wherein said human tibial bone block is pre-shaped before surgery as a first pre-shaped dowel bone block having a dowel diameter specially adapted for fixation in a bone tunnel having a tunnel diameter and said human patellar bone block is pre-shaped before surgery as a second pre-shaped dowel bone block having a dowel diameter specially adapted for fixation in a bone tunnel having a tunnel diameter;
and wherein said human patellar tendon portion runs along at least a portion of the length of at least one of said pre-shaped dowels and said human patellar tendon portion forms at least a portion of an outer surface of at least one of said pre-shaped dowels and the portion of the outer surface maintains essentially the same contour as the rest of at least one of said pre-shaped dowels; and
further wherein said human allograft implant has been treated to minimize the level of antigenic agents and/or potentially pathogenic agents present in the graft.
10. The pre-shaped human allograft implant of claim 9 , wherein said human tibial bone block is in a pre-shaped cylindrical dowel form with no groove thereon.
11. The pre-shaped human allograft implant of claim 10 , wherein said human patellar bone block is in a pre-shaped cylindrical dowel form with no groove thereon.
12. A recovered and cleaned pre-shaped human allograft implant wherein at least one bone block of said allograft is adapted before surgery for fixation in a bone tunnel having a tunnel diameter, comprising:
an allograft Achilles tendon naturally attached to a portion of calcaneal bone,
a natural insertion site of said allograft Achilles tendon, and
a portion of calcaneal bone distal to said natural insertion site; and
wherein said allograft Achilles tendon has a medial/lateral division, and at least one side of said portion of calcaneal bone is cut even with said division of said tendon; and
wherein said tendon runs along at least a portion of the length of said portion of calcaneal bone and said tendon forms at least a portion of an outer surface that maintains essentially the same contour as the rest of the portion of the calcaneal bone; and
wherein said portion of calcaneal bone is pre-shaped before surgery as a pre-shaped dowel bone block having a dowel diameter specially adapted for fixation in a bone tunnel having a tunnel diameter;
further wherein said human allograft implant has been treated to minimize the level of antigenic agents and/or potentially pathogenic agents present in the graft.
13. The pre-shaped human allograft implant of claim 12 , wherein said portion of calcaneal bone is in a pre-shaped cylindrical dowel form with no groove thereon.
14. The pre-shaped human allograft implant of claim 12 , wherein said portion of calcaneal bone is in a pre-shaped cylindrical dowel form and is tapered.
15. The pre-shaped human allograft implant of claim 12 , wherein said portion of calcaneal bone is in a pre-shaped cylindrical dowel form and is not tapered.