Rotationally and angularly adjustable tibial cutting guide and method of use

• US 5,342,367 A
• Filed: 09/14/1993
• Issued: 08/30/1994
• Est. Priority Date: 02/20/1992
• Status: Expired due to Fees

• Current Assignee: Wright Medical Technology Incorporated (Stryker Corporation)
• Original Assignee: Wright Medical Technology Incorporated (Stryker Corporation)
• Inventors: Ferrante, Joseph M., Whiteside, Leo A., Fichera, Alfred J.
• Primary Examiner(s): Brown, Michael A.
• Application Number:
  US08/120,937
• Time in Patent Office: 350 Days
• Field of Search: 606/79, 606/80, 606/86, 606/87, 606/88, 606/62, 606/89
• 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 method of ostectomying the proximal tibial surface comprising the steps of:

resecting a small amount of the superior proximal surface of the tibia to form an approximately planar surface which is approximately transverse to the central long axis of the tibia;

determining the approximate location on the superior proximal surface of the tibia which corresponds to the central long axis of the tibia;

advancing a reamer guide through said superior proximal surface at the location along the interior of the tubular shaft of the tibia for a sufficient distance to enable the central long axis of said reamer to correspond with the central long axis of the tibia;

modifying the proximal surface of the tibia through the use of a plateau planar until said surface is smooth;

trimming any remaining bone from the proximal surface of the tibia to present a smooth, flat surface on which a proximal tibial prosthesis can be affixed;

installing a tibial cutting guide including a tibial trial stem and a tibial trial base on the proximal surface at the tibia;

performing resection of the medial-lateral surface of the tibia using the tibial cutting guide; and

removing the tibial cutting guide.