Lockable intramedullary fixation device

Patent metadata

Field	Value
Publication number	US-9308031-B2
Application number	US-201213415336-A
Country	US
Kind code	B2
Filing date	Mar 8, 2012
Priority date	Jan 26, 2007
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

An orthopedic device is provided. The orthopedic device can include an intramedullary implant defining a longitudinal bore along a longitudinal axis. The intramedullary implant can define at least one bore formed along an axis for receipt of a fastener. The orthopedic device can include a fixation device receivable within the longitudinal bore. The fixation device can have at least one guiding bore formed along a guiding axis transverse to the longitudinal axis. The orthopedic device can include at least one collet received within the at least one guiding bore for positioning and locking the fastener at a variable angle relative to the guiding axis of the fixation device and the axis of the intramedullary implant.

First claim

What is claimed is:

1. An orthopedic device comprising:
an intramedullary implant defining a longitudinal bore along a longitudinal axis and at least one bore formed along an axis for receipt of a fastener;
a fixation device receivable within the longitudinal bore, the fixation device having at least one guiding bore formed along a guiding axis transverse to the longitudinal axis;
at least one collet received within the at least one guiding bore for positioning the fastener at a variable angle relative to the guiding axis of the fixation device and the axis of the intramedullary implant; and
a locking member engageable with the longitudinal bore and configured for rotation and engagement with the fixation device,
wherein the at least one guiding bore includes a collet retaining feature formed in at least a portion of the circumference of the at least one guiding bore that laterally extends in a direction normal to the guiding axis and couples the at least one collet to the at least one guiding bore for receipt of the fastener, and
wherein rotation of the locking member, when engaged with the longitudinal bore and the fixation device, advances the fixation device in the longitudinal bore in a proximal/distal direction, and advancement of the fixation device applies a force to the at least one collet to deform the at least one collet for coupling the fastener to the intramedullary implant.

2. The orthopedic device of claim 1 , wherein the at least one collet includes at least one rib and the collet retaining feature comprises a groove that receives the at least one rib to movably couple the at least one collet to the fixation device.

3. The orthopedic device of claim 1 , wherein the at least one guiding bore is defined by opposing side walls, and at least one of the opposing side walls defines a collet retaining feature that couples the at least one collet to the at least one guiding bore.

4. The orthopedic device of claim 1 , wherein the at least one collet is movable relative to the at least one guiding bore.

5. The orthopedic device of claim 4 , wherein the at least one collet is movable about 5 degrees to about 20 degrees about the guiding axis.

6. The orthopedic device of claim 1 , wherein the at least one collet is deformable.

7. The orthopedic device of claim 6 , wherein the collet is annular having a central bore for receipt of the fastener and at least one slot.

8. An orthopedic device comprising:
a fixation device having a longitudinal axis and defining at least a first guiding bore along a first guiding axis transverse to the longitudinal axis and second guiding bore along a second guiding axis transverse to the longitudinal axis, the first guiding bore and the second guiding bore each including a retaining feature formed along a portion of each of the first guiding bore and the second guiding bore that laterally extends in a direction normal to the respective first and second guiding axes and;
a collet coupled to the retaining feature of each of the first guiding bore and the second guiding bore so that each collet is movable relative to each of the first guiding bore and the second guiding bore for positioning a fastener at a variable angle relative to the respective one of the first guiding axis and second guiding axis;
an intramedullary implant defining a first implant bore, a second implant bore and a longitudinal bore that receives the fixation device, the first implant bore substantially coaxially aligned with the first guiding bore and the second implant bore substantially coaxially aligned with the second guiding bore when the fixation device is in a first position for receipt of a first bone fastener through the first implant bore and first guiding bore and a second bone fastener through the second implant bore and second guiding bore; and
a locking member coupled to the fixation device and configured for rotation, the locking member at least partially received within the longitudinal bore of the intramedullary implant, wherein rotation of the locking member advances the fixation device in the longitudinal bore from the first position to a second position for coupling the first and second bone fasteners to the intramedullary implant.

9. The orthopedic device of Claim 8 , wherein the collet is deformable, and the movement of the fixation device from the first position to the second position deforms the collet.

10. The orthopedic device of claim 8 , wherein the collet is annular and includes a rib formed about at least a portion of the circumference of the collet, the collet defining a central bore.

11. The orthopedic device of claim 10 , wherein the retaining feature comprises a groove that receives the rib of the collet to movably couple the collet to the fixation device.

12. The orthopedic device of claim 8 , wherein at least one of the first guiding bore and the second guiding bore is defined by opposing side walls, and at least one of the opposing side walls defines the retaining feature.

13. An orthopedic device comprising:
an intramedullary implant defining a longitudinal bore along a longitudinal axis and at least one bore formed along an axis transverse to the longitudinal axis for receipt of a fastener;
a movable fixation device receivable within the longitudinal bore, the fixation device having at least one guiding bore formed along a guiding axis transverse to the longitudinal axis, the at least one guiding bore including a retaining feature formed along at least a portion of the guiding bore that laterally extends in a direction normal to the respective first and second guiding axes, the at least one guiding bore coaxially aligned with the at least one bore in a first position; and at least one deformable collet having a rib coupled to the retaining feature of the at least one guiding bore for positioning the fastener at a variable angle relative to the guiding axis of the fixation device and the axis of the intramedullary nail; and
a locking member engaged with the fixation device and configured for rotation, the locking member at least partially receivable within the longitudinal bore, wherein rotation of the locking member moves the fixation device from the first position to a second position within the longitudinal bore, and
wherein movement of the fixation device from the first position to the second position within the longitudinal bore deforms the at least one collet to couple the fastener to the intramedullary implant.

14. The orthopedic device of claim 13 , wherein the at least one collet is annular and the rib is formed about at least a portion of a circumference of the at least one collet.

15. The orthopedic device of claim 13 , wherein the at least one collet is movable within the at least one guiding bore.

16. The orthopedic device of claim 15 , wherein the at least one collet is movable about 5 degrees to about 20 degrees about the guiding axis.

Assignees

• Elghazaly Timothy M
• O'Reilly Joseph M
• Biomet Mfg Llc

Inventors

• Elghazaly Timothy M
• O'Reilly Joseph M

Classifications

• A61B17/1775

  for the foot or ankle · CPC title

• A61B17/725 Primary

  with locking pins or screws of special form · CPC title

• A61B17/7241 Primary

  the nail having separate elements through which screws pass · CPC title

• A61B17/921

  for intramedullary devices · CPC title

• A61B17/744

  the longitudinal elements coupled to an intramedullary nail · CPC title