PATIENT-SPECIFIC HUMERAL GUIDE DESIGNS

• US 20160374697A1
• Filed: 03/17/2016
• Published: 12/29/2016
• Est. Priority Date: 06/25/2015
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Joseph, Benjamin Isaiah, Vogt, Wolfgang Walter, Kehres, Clinton E., Winslow, Nathan A., Hurst, Jason M.
• Granted Patent: US 10,568,647 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/15 Guides therefor arrangements for guiding straight saw blades in general B23D51/025
• CPC Class Codes: A61B 17/1739 specially adapted for particular parts of the body
• CPC Class Codes: A61B 17/1778 for the shoulder
• CPC Class Codes: A61B 2017/568 produced with shape and dimensions specific for an individual patient
• CPC Class Codes: A61F 2/4612 of shoulders

Abstract

A humeral cut guide system for a humeral head comprises: a bone-engagement member including a first patient-specific bone-engagement surface that is complementary and made to substantially mate and nest in only one position on a specific patient'"'"'s humeral head; a registration member connected to the bone-engagement member including a second patient-specific bone engagement surface that is sized and made to substantially mate and nest in only one position with the specific patient'"'"'s bicipital groove; a first protrusion extending from the registration member and having a first surgeon-engaging surface for manipulation by a surgeon; and a cut guide plate connected to and extending away from the registration member such that, upon the bone-engagement member mating and nesting with the specific patient'"'"'s humeral head, the cut guide plate is spaced apart from the humeral head, wherein the cut guide plate defines an elongate slot.

Claims

1. A humeral cut guide system for a humeral head, the humeral cut guide system comprising:

a bone-engagement member including a first patient-specific bone-engagement surface that is complementary and made to substantially mate and nest in only one position on a specific patient'"'"'s humeral head;

a registration member connected to the bone-engagement member including a second patient-specific bone engagement surface that is sized and made to substantially mate and nest in only one position with the specific patient'"'"'s bicipital groove;

a first protrusion extending from the registration member and having a first surgeon-engaging surface for manipulation by a surgeon; and

a cut guide plate connected to and extending away from the registration member such that, upon the bone-engagement member mating and nesting with the specific patient'"'"'s humeral head, the cut guide plate is spaced apart from the humeral head, wherein the cut guide plate defines an elongate slot.

2. The humeral cut guide system of claim 1, further comprising a second protrusion extending from a junction between the bone-engagement member and the registration member.

3. The humeral cut guide system of claim 2, wherein the second protrusion includes:

a pair of supports extending from respective sides of the registration portion;

a pair of sidewalls connected to and diverging away from the pair of supports; and

a second surgeon-engaging surface connecting the pair of sidewalls to each other.

4. The humeral cut guide system of claim 2, wherein the registration member is flexible between the first and second protrusions.

5. The humeral cut guide system of claim 4, wherein the bone-engagement member and the registration member are comprised of a polymer material.

6. The humeral cut guide system of claim 4, wherein the registration member includes a first portion and a second portion, the first portion having the second patient-specific bone engagement surface and the second portion having a third patient-specific bone engagement surface that is sized and made to substantially mate and nest in only one position with the specific patient.

7. The humeral cut guide system of claim 1, wherein the first protrusion includes a registration flange extending from a juncture of the registration member and the first protrusion.

8. The humeral cut guide system of claim 7, wherein the registration flange comprises a curved body having an inner surface for contacting bone and an outer surface for engaging a thumb of a surgeon.

9. The humeral cut guide system of claim 8, wherein the inner surface is shaped to mate on a lateral surface of a humeral bone opposite a humeral head.

10. The humeral cut guide system of claim 8, wherein the inner surface is patient-specific and the outer surface includes a concave contour.

11. The humeral cut guide system of claim 1, further comprising:

an elongate member extending from the registration member; and

a connection portion connected to the cut guide plate;

wherein the elongate member is configured to smoothly slide along the connection portion.

12. The humeral cut guide system of claim 11, wherein the elongate member is infinitely positionable along the connection portion.

13. The humeral cut guide system of claim 11, wherein the elongate member has a T-shape and the connection portion has a corresponding T-shaped socket.

14. A humeral cut guide system for a humeral head, comprising:

a bone-engagement member including a first patient-specific bone-engagement surface that is complementary and made to substantially mate and nest in only one position on a specific patient'"'"'s humeral head;

a registration member connected to the bone-engagement member including a second patient-specific bone engagement surface that is sized and made to substantially mate and nest in only one position with the specific patient'"'"'s bicipital groove;

an elongate member extending from the registration member; and

a cut guide plate having a connection portion with a socket configured to receive the elongate member such that a position of the cut guide plate relative to the specific patient'"'"'s humeral head is selectively adjustable along the elongate member in an infinite number of positions.

15. The humeral cut guide system of claim 14, wherein the elongate member is configured to smoothly slide along the socket of the connection portion.

16. The humeral cut guide system of claim 14, wherein the elongate member has a T-shape and the slot of the connection portion has a corresponding T-shaped socket.

17. A method of resecting or resurfacing a humeral head using a humeral cut guide, the method comprising:

positioning a bone-engagement member along a humeral head surface of a humeral bone;

positioning a registration member along a bicipital groove surface of a humeral bone;

squeezing the registration member and the bone-engagement member to ensure seating of the humeral cut guide;

sliding a cut guide plate along an elongate member extending from the humeral cut guide to engage the humeral head surface of the humeral bone; and

resecting or resurfacing the humeral head using a cutting device engaged with the cut guide plate.

18. The method of claim 17, further comprising manipulating the humeral cut guide using a pair of protrusions extending from opposite ends of the registration member.

19. The method of claim 18, wherein the bone-engagement member and the registration member include first and second patient-specific surfaces, respectively.

20. The method of claim 17, further comprising smoothly sliding the cut guide plate along the elongate member through an infinitely small number of positions to reach a resecting or resurfacing position.