Rotationally and angularly adjustable tibial cutting guide and method of use

• US 5,275,603 A
• Filed: 02/20/1992
• Issued: 01/04/1994
• Est. Priority Date: 02/20/1992
• Status: Expired due to Term

• Current Assignee: Wright Medical Technology Incorporated (Stryker Corporation)
• Original Assignee: Wright Medical Technology Incorporated (Stryker Corporation)
• Inventors: Fichera, Alfred J., Ferrante, Joseph M., Whiteside, Leo A.
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US07/838,093
• Time in Patent Office: 684 Days
• Field of Search: 606/79, 606/62, 606/53, 606/57, 606/78, 606/82, 606/88, 606/96, 606/86, 606/87, 623/16, 623/17
• US Class Current: 606/86.00R
• CPC Class Codes: A61B 17/152 for removing a wedge-shaped piece of bone
• CPC Class Codes: A61B 17/157 Cutting tibia

Abstract

The present invention provides a cutting guide for ostectomy of the medial and lateral tibial surface during knee surgery. The cutting guide comprises a guide block including an axial opening defined along the longitudinal axis of the tibial canal. The guide block being adapted for attachment to a tibial trial base including alignment holes for locating the proper degree of rotational alignment of the tibial trial base with respect to the longitudinal axis of the tibia to assure the proper varus-valgus orientation and anterior-posterior slope of the resected tibial surface with respect to the femur. A pair of blade slots are provided for guiding a cutting tool for making a wedge-shaped resection of the tibia to accommodate a tibial tray component having a preselected internal distal surface corresponding to that of the resected tibia. The blade slots are pivotally mounted for selectively adjusting the angular alignment of the blade slots with respect to the lateral-medial axis perpendicular to the longitudinal axis of the tibia.

Claims

1. A cutting guide for ostectomy of the proximal tibial surface during knee surgery comprising:

a tibial trial base having a plurality of aligning holes formed therein;

a guide block having an anterior surface, and opposed proximal and distal surfaces including an axial opening defined along the longitudinal axis of the tibial canal, the guide block being adapted for attachment to said tibial trail base, said tibial trial base having an axial opening

means for locating the proper degree of rotational alignment of the tibial trial base with respect to the longitudinal axis of the tibia to assure the proper coverage and alignment with the mating femoral component;

means for guiding a cutting tool for making a wedge-shaped resection of the tibia to accommodate a tibial tray component having a preselected internal distal surface corresponding to that of the resected tibia, the guide means being mounted to the anterior surface of the guide block;

means for selectively adjusting the angular alignment of the guide means with respect to the lateral-medial axis perpendicular to the longitudinal axis of the tibia;

means for connecting the guide block to the tibial trail base during resection; and

a handle having a central axis with opposed proximal and distal ends, the distal end including means for interlocking the guide block to the tibial trial base, the handle remaining fixed to the tibial trial during the resection process, such that the guide means is held in proper alignment with respect to the longitudinal axis without the necessity of intermedullary tibial instrumentation.

2. The cutting guide of claim 1 wherein the guide means comprises at least one blade slot formed by a pair of parallel plates separated by a certain distance.

3. The cutting guide of claim 2 wherein the guide means comprises a pair of blade slots formed by a pair of parallel plates separated by a certain distance, the guide means being pivotally mounted to the anterior surface at the guide block.

4. The cutting guide of claim 1 wherein the interlocking means includes the handle having opposed proximal and distal ends, wherein the distal end of the handle threadly engages a lock screw to secure the cutting guide to the tibial trial base and the handle remains fixed to the cutting guide during resection.

5. The cutting guide of claim 1 further including a spacer plate wherein a spacer plate has opposed proximal and distal surfaces including an axial passage defined along a longitudinal axis of the tibial canal and adapted to be attached to a medium to extra large size tibial trial base for accommodating the width of the femoral runner.

6. The cutting guide of claim 1 wherein a tibial trial stem having internal threads is interlocked to the tibial trial base, and the tibial trial stem anchored within the tibial canal.

7. A cutting guide for ostectomy of the proximal tibial surface during knee surgery comprising:

a guide block having an anterior surface, and opposed proximal and distal surfaces including an axial opening defined along the longitudinal axis of the tibial canal, the guide block being adapted for attachment to a tibial trial base having an axial aperture;

means for locating the proper degree of rotational alignment of the tibial trial base with respect to the longitudinal axis of the tibia to assure the proper coverage and alignment with the mating femoral component;

means for guiding a cutting tool for making a wedge-shaped resection of the tibia to accommodate a tibial tray component having a preselected internal distal surface corresponding to that of the resected tibia, the guide means being mounted to the anterior surface of the guide block;

a mechanism for selectively adjusting the angular alignment of the guide means with respect to the lateral-medial axis perpendicular to the longitudinal axis of the tibia, the adjustment mechanism including a ball plunger assembly, a plurality of indents, and a threaded screw, the ball plunger assembly being formed in the anterior surface of the guide block and being engagable with the indents formed in the guide means to selectively adjust the angular alignment of the guide means with respect to the lateral-medial axis perpendicular to the longitudinal axis of the tibia, the threaded screw being insertable through a guideway formed in the guide means, the threaded screw being adapted to be threaded into the guide block for tightening against the guide means to lock the guide means in position with respect to the lateral-medial axis perpendicular to the longitudinal axis of the tibia;

means for connecting the guide block to the tibial trial base during resection; and

a handle having a central axis with opposed proximal and distal ends, the distal end including means for interlocking the guide block to the tibial trial base, the handle remaining fixed to the tibial trail during the resection process, such that the guide means is held in proper alignment with respect to the longitudinal axis without the necessity of intermedullary tibial instrumentation.

8. The cutting guide of claim 7 wherein the angular alignment of the guide means with respect to the lateral-medial axis perpendicular to the longitudinal axis of the tibia can have an offset of about 0°

to 22°

.

9. A cutting guide for ostectomy of the proximal tibial surface during knee surgery comprising:

a guide block having an anterior surface, and opposed proximal and distal surfaces including an axial opening defined along the longitudinal axis of the tibial canal, the guide block being adapted for attachment to a tibial trial base having an axial aperture;

a tibial trial stem having internal threads is interlocked to the tibial trial base, and the tibial trial stem anchored within the tibial canal;

means for locating the proper degree of rotational alignment of the tibial trail base with respect to the longitudinal axis of the tibia to assure the proper varus-valgus orientation and anterior-posterior slope of the resected tibial surface with respect to the femur;

a pair of blase slots formed by a pair of parallel plates separated by a certain distance for guiding a cutting tool for making a wedge-shaped resection of the tibia to accommodate a tibial tray component having a preselected internal distal surface corresponding to that of the resected tibia, the blade slots being pivotally mounted to the anterior surface of the guide block;

a ball plunger assembly, a plurality of indents, and a threaded screw, the ball plunger assembly being formed in the anterior surface of the guide block and being engagable with the indents formed in the guide means to selectively adjust the angular alignment of the guide means with respect to the lateral-medial axis perpendicular to the longitudinal axis of the tibia, the threaded screw being insertable through a guideway formed in the guide means, the threaded screw being adapted to be threaded into the guide block for tightening against the guide means to lock the guide means in position with respect to the lateral-medial axis perpendicular to the longitudinal axis of the tibia; and

means for interlocking the guide block to the tibial trial base during resection;

a handle having a central axis with opposed proximal and distal ends, the distal end including means for interlocking the guide block to the tibial trail base, the handle remaining fixed to the tibial trail during the resection process.

10. A cutting guide for ostectomy of the proximal tibial surface during knee surgery comprising:

a guide block having an anterior surface, and opposed proximal and distal surfaces including an axial opening defined along the longitudinal axis of the tibial canal, the guide block being adapted for attachment to a tibial trial base having an axial aperture;

a tibial trial stem having internal threads is interlocked to the tibial trail base, and the tibial trial stem anchored within the tibial canal;

means for locating the proper degree of rotational alignment of the tibial trail base with respect to the longitudinal axis of the tibia to assure the proper varus-valgus orientation and anterior-posterior slope of the resected tibial surface with respect to the femur;

a pair of blade slots formed by a pair of parallel plates separated by a certain distance for guiding a cutting tool for making a wedge-shaped resection of the tibia to accommodate a tibial tray component having a preselected internal distal surface corresponding to that of the resected tibia, the blade slots being pivotally mounted to the anterior surface of the guide block;

a spacer plate having opposed proximal and distal surfaces including an axial passage defined along a longitudinal axis of the tibial canal and adapted to be attached to a medium to extra large size tibial trial base for accommodating the width of the femoral runner;

a ball plunger assembly, a plurality of indents, and a threaded screw, the ball plunger assembly being formed in the anterior surface of the guide block and being engagable with the indents formed in the guide means to selectively adjust the angular alignment of the guide means with respect to the lateral-medial axis perpendicular to the longitudinal axis of the tibia, the threaded screw being insertable through a guideway formed in the guide means, the threaded screw being adapted to be threaded into the guide block for tightening against the guide means to lock the guide means in position with respect to the lateral-medial axis perpendicular to the longitudinal axis of the tibia; and

means for interlocking the guide block to the tibial trial base during resection;

a handle having a central axis with opposed proximal and distal ends, the distal end including means for interlocking the guide block to the tibial trial base, the handle remaining fixed to the tibial trail during the resection process.