Bone cutting guides for use in the implantation of prosthetic joint components

• US 5,897,559 A
• Filed: 09/18/1997
• Issued: 04/27/1999
• Est. Priority Date: 11/02/1995
• Status: Expired due to Term

• Current Assignee: MedIdea LLC
• Original Assignee: MedIdea LLC
• Inventors: Masini, Michael A.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Shai, Daphna
• Application Number:
  US08/937,216
• Time in Patent Office: 586 Days
• Field of Search: 606/86, 606/82, 606/87, 606/88, 623/20
• US Class Current: 606/86.00R
• CPC Class Codes: A61B 17/154 for preparing bone for knee prosthesis
• CPC Class Codes: A61B 17/155 Cutting femur
• CPC Class Codes: A61B 17/157 Cutting tibia
• CPC Class Codes: A61B 2017/00902 transparent or translucent
• CPC Class Codes: A61F 2/3859 Femoral components
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• CPC Class Codes: A61F 2002/3009 Transparent or translucent
• CPC Class Codes: A61F 2002/30777 Oblong apertures
• CPC Class Codes: A61F 2250/0091 transparent or translucent

Abstract

Improved bone-cutting guides enable a surgeon to better gauge required resection characteristics. A body having an outer surface and an inner surface configured to be positioned against a bone surface to be modified includes one or more openings enabling a bone-cutting tool to be used though the body so as to perform resections beneath the inner surface. To stabilize the bone-cutting tool during the execution of a particular resection, the invention preferably further includes one of more guides which may be temporarily positioned relative to the upper surface of the body. In one embodiment, the outer surface of the body may be shaped to co-act in a joint as part of a trial reduction. For example, the outer surface may be shaped according to a natural proximal tibia, enabling a knee joint reduction to be performed prior to resection. Rather than shaping the outer surface of the body to co-act in a joint as part of a trial reduction, the outer surface of the body may instead be configured to receive an insert featuring the joint-related surfaces.

Claims

1. A bone-cutting guide adapted for use with a bone-cutting tool, comprising:

a body having an outer surface and an inner surface, the inner surface being configured for placement against a bone surface to be modified, the outer surface of the body being adapted to receive an insert having an outer surface, and wherein the outer surface of the insert is shaped so as to co-act in a joint as part of a trial reduction;

at least one aperture extending through the body from the outer surface to the inner surface; and

one or more separate and removable guide blocks, each block having a first surface adapted for positioning relative to the outer surface of the body, and a second surface for stabilizing the movement of the bone-cutting tool at a desired angle through the aperture.

2. The bone-cutting guide of claim 1, including a guide block which is wedge-shaped, such that the desired angle is non-perpendicular with respect to the bone surface to be modified.

3. The bone-cutting guide of claim 1, including a guide block having first and second surfaces configured such that the desired angle is a right angle with respect to the bone surface to be modified.

4. The bone-cutting guide of claim 1, wherein the inner surface is flat.

5. The bone-cutting guide of claim 1, wherein the outer surface is flat.

6. The bone-cutting guide of claim 1, wherein the outer surface is shaped so as to co-act in a joint as part of a trial reduction.

7. The bone-cutting guide of claim 6, wherein the outer surface is shaped according to a natural proximal tibia, enabling the cutting guide to co-act in a knee joint as part of a trial reduction.

8. The bone-cutting guide of claim 1, wherein the outer surface is shaped according to a natural proximal tibia, enabling the cutting guide to co-act in a knee joint as part of a trial reduction.

9. The bone-cutting guide of claim 1, wherein the insert includes one or more apertures aligned with those of the body, enabling a bone-cutting tool to extend therethrough.

10. A bone-cutting guide adapted for use with a bone-cutting tool, comprising:

a body having an outer surface and an inner surface, the inner surface being configured for placement against a bone surface to be modified;

an insert having an inner surface configured for placement relative to the outer surface of the body and an outer surface shaped so as to co-act in a joint as part of a trial reduction;

at least one aperture extending through the insert and the body; and

one or more cutting blocks, each block having a first surface adapted for positioning relative to the outer surface of the insert, and a second surface for stabilizing the movement of the bone-cutting tool at a desired angle through the insert and body.

11. The bone-cutting guide of claim 10, including a guide block which is wedge-shaped, such that the desired angle is non-perpendicular with respect to the bone surface to be modified.

12. The bone-cutting guide of claim 10, including a guide block having first and second surfaces configured such that the desired angle is a right angle with respect to the bone surface to be modified.

13. The bone-cutting guide of claim 10, wherein the outer surface of the insert is shaped according to a natural proximal tibia, enabling the cutting guide to co-act in a knee joint as part of a trial reduction.