METHOD AND APPARATUS FOR PERFORMING AN OPEN WEDGE, HIGH TIBIAL OSTEOTOMY

• US 20110251617A1
• Filed: 03/14/2011
• Published: 10/13/2011
• Est. Priority Date: 01/31/2005
• Status: Active Grant

• Current Assignee: Arthrex Incorporated
• Original Assignee: Arthrex Incorporated
• Inventors: Burns, Ralph E., Novak, Vincent P., Schneider, Robert E., Ammann, Kelly G.
• Granted Patent: US 8,834,475 B2
• Time in Patent Office: Days
• US Class Current: 606/88
• CPC Class Codes: A61B 17/02 for holding wounds open; Tractors specula A61B1/32 ; drainage appliances for wounds A61M27/00
• CPC Class Codes: A61B 17/15 Guides therefor arrangements for guiding straight saw blades in general B23D51/025
• CPC Class Codes: A61B 17/152 for removing a wedge-shaped piece of bone
• CPC Class Codes: A61B 17/1615 Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
• CPC Class Codes: A61B 17/1675 for the knee
• CPC Class Codes: A61B 17/1732 for bone breaking devices
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 17/68 Internal fixation devices , including fasteners and spinal fixators, even if a part thereof projects from the skin bone staples A61B17/0642
• CPC Class Codes: A61B 17/8095 Wedge osteotomy devices
• CPC Class Codes: A61B 17/88 Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices A61B17/7074 takes precedence
• CPC Class Codes: A61B 2017/1602 Mills
• CPC Class Codes: A61B 2090/034 abutting on parts of the device itself
• CPC Class Codes: A61B 2090/067 for measuring angles
• CPC Class Codes: A61F 2002/30736 Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect

Abstract

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising a wedge-shaped implant for disposition in a wedge-shaped opening created in the tibia, wherein the wedge-shaped implant comprises at least one key for disposition in at least one corresponding keyhole formed in the tibia adjacent to the wedge-shaped opening created in the tibia, wherein each of the at least one keys comprises an interior bore for receiving a fixation screw, at least one fixation screw for disposition in the interior bore of the at least one key, and further wherein the apparatus is configured so that when the at least one fixation screw is received in the interior bore, the at least one fixation screw terminates within the bore.

Claims

1. Apparatus for performing an open wedge osteotomy comprising:

a wedge-shaped implant having keys extending between an anterior implant surface to a posterior implant surface and protruding from upper and lower surfaces of the wedge-shaped implant, the protruding keys aligning with corresponding keyholes formed adjacent to a wedge-shaped opening, wherein each of the keys comprises an interior bore for receiving a fixation screw;

at least one fixation screw for disposition in the interior bore of the keys.

2. Apparatus according to claim 1 wherein the upper and lower surfaces are asymmetric.

3. Apparatus according to claim 1 wherein the apparatus is configured so that when the at least one fixation screw is received in the interior bore, the at least one fixation screw terminates within the bore.

5. Apparatus according to claim 1 wherein the keys have an expansion slot.

6. Apparatus according to claim 1 wherein the interior bore is axially aligned with the longitudinal axis of its host key.

7. Apparatus according to claim 1 wherein each of the keys is slotted longitudinally so as to permit expansion when the fixation screw is received by the key.

8. Apparatus according to claim 1 wherein each of the keys includes external ribs to facilitate fixation of the key relative to the keyhole.

9. Apparatus according to claim 8 wherein the external ribs extend longitudinally along the keys.

10. Apparatus according to claim 8 wherein the external ribs extend circumferentially along the keys.

65. Apparatus according to claim 1 wherein each of the keys includes at least two interior bores for receiving a fixation screw therein.

71. Apparatus according to claim 1 wherein the wedge-shaped implant comprises a shear rib, laterally offset from at least one of the keys, for disposition in a corresponding shear rib keyhole formed in the tibia adjacent to the wedge-shaped opening.

4. Apparatus according to claim wherein the wedge-shaped implant comprises a base component.

11-22. -22. (canceled)

23. Apparatus for performing an open wedge osteotomy comprising:

a wedge-shaped implant for disposition in a wedge-shaped opening, wherein the wedge-shaped implant comprises at least one key for disposition in at least one corresponding keyhole formed adjacent to the wedge-shaped opening, wherein each of the at least one keys comprises an interior bore for receiving a fixation screw, and a counterbore communicating with the interior bore;

at least one draw nut disposed in the counterbore, wherein the draw nut comprises an interior bore for receiving the fixation screw; and

at least one fixation screw for disposition in the interior bore of the at least one key and the interior bore of the draw nut.

26. Apparatus according to claim 23 wherein the wedge-shaped implant comprises a base component.

27. Apparatus according to claim 26 wherein the at least one key is disposed on the base.

28. Apparatus according to claim 23 wherein the interior bore is axially aligned with the longitudinal axis of its host key.

29. Apparatus according to claim 23 wherein each of the at least one keys are slotted longitudinally so as to permit expansion when a fixation screw is received by the key.

30. Apparatus according to claim 23 wherein each of the at least one keys includes external ribs to facilitate fixation of the at least one key relative to the keyhole.

31. Apparatus according to claim 30 wherein the external ribs extend longitudinally along the at least one key.

67. Apparatus according to claim 23 wherein each of the at least one keys includes at least two interior bores for receiving a fixation screw therein.

73. Apparatus according to claim 23 wherein the wedge-shaped implant comprises a shear rib, laterally offset from the at least one key, for disposition in a corresponding shear rib keyhole formed adjacent to the wedge-shaped opening.

77. Apparatus according to claim 30 wherein the external ribs extend circumferentially along the at least one key.

24. (canceled)

25. (canceled)

32-43. -43. (canceled)

44. Apparatus for performing an open wedge high tibial osteotomy comprising:

a wedge-shaped implant for disposition in a wedge-shaped opening, wherein the wedge-shaped implant comprises at least one open key for disposition in the at least one corresponding keyhole formed adjacent to the wedge-shaped opening, and further wherein each of the at least one keys comprises a threaded recess for receiving a fixation screw; and

at least one fixation screw for disposition in the interior bore of the at least one key.

45. Apparatus according to claim 44 wherein the at least one open key comprises opposed longitudinal edges.

47. Apparatus according to claim 44 wherein the wedge-shaped implant comprises a base component.

48. Apparatus according to claim 47 wherein the at least one open key is disposed on the base component.

49. Apparatus according to claim 44 wherein the threaded recess is axially aligned with the longitudinal axis of its host open key.

50. Apparatus according to claim 44 wherein each of the at least one open keys is slotted longitudinally so as to permit expansion when a fixation screw is received by the at least one open key.

51. Apparatus according to claim 44 wherein each of the at least one open keys includes external ribs to facilitate fixation of the at least one open key relative to the keyhole.

52. Apparatus according to claim 51 wherein the external ribs extend longitudinally along the at least one open key.

53. Apparatus according to claim 51 wherein the external ribs extend circumferentially along the at least one open key.

69. Apparatus according to claim 44 wherein each of the at least one open keys includes at least two threaded recesses for receiving a fixation screw therein.

75. Apparatus according to claim 44 wherein the wedge-shaped implant comprises a shear rib, laterally offset from the at least one key, for disposition in a corresponding shear rib keyhole formed adjacent to the wedge-shaped opening.

46. (canceled)

54-64. -64. (canceled)

66. (canceled)

68. (canceled)

70. (canceled)

72. (canceled)

74. (canceled)

76. (canceled)

78. (canceled)