PATIENT SPECIFIC GUIDES

• US 20090024131A1
• Filed: 09/16/2008
• Published: 01/22/2009
• Est. Priority Date: 02/27/2006
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Belcher, Nathan Emick, Metzger, Robert
• Granted Patent: US 8,608,748 B2
• Time in Patent Office: Days
• US Class Current: 606/88
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/157 Cutting tibia
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 17/58 for osteosynthesis, e.g. bone plates, screws , setting implements or the like A61B17/14, A61B17/16 take precedence
• CPC Class Codes: A61B 2017/22001 Angioplasty, e.g. PCTA
• CPC Class Codes: A61B 2034/102 Modelling of surgical devices, implants or prosthesis
• CPC Class Codes: A61B 34/10 Computer-aided planning, simulation or modelling of surgical operations

Abstract

A device for an orthopedic knee procedure. The device includes a drill guide having a body portion and first and second posts extending from the body portion, the first and second posts defining first and second internal through-bores, the first post having a first cross-sectional shape and the second post having a second cross-sectional shape different than the first cross-sectional shape of the first post.

Claims

1. A device for an orthopedic knee procedure comprising:

a drill guide having a body portion and first and second posts extending from the body portion, the first and second posts defining first and second internal through bores, the first post having a first cross-sectional shape and the second post having a second cross-sectional shape different than the first cross-sectional shape of the first post.

2. The device of claim 1, wherein the second post has a substantially keyhole-shaped cross-section.

3. The device of claim 1, wherein the second post has a substantially rectangular cross-section.

4. The device of claim 1, wherein the first and second bores have circular cross-sections.

5. The device of claim 1, further comprising a patient-specific alignment guide, the alignment guide including:

a body with an inner anatomy-engaging surface shaped to closely conform and mate with a corresponding knee joint surface; and

a single guiding receptacle defining an inner channel sized and shaped to non-rotatably receive the second post of the drill guide,

wherein, when the alignment guide is mounted on the joint surface and the second post of the drill guide is received in the single guiding receptacle of the alignment guide, an exterior sidewall of the first post of the drill guide remains exposed and out of contact with the alignment guide and provides clearance for a tendon associated with the joint surface, the first post at a fixed orientation relative to the single guiding receptacle.

6. The device of claim 5, wherein the drill guide is non-rotatably mounted on the alignment guide according to a pre-operative surgical plan.

7. A device for an orthopedic knee procedure comprising:

a tibial drill guide having a body portion and first and second posts extending from the body portion, the first and second posts defining first and second internal through bores with circular cross-sections, the first post having a first cross-sectional shape and the second post having a second cross-sectional shape different than the first cross-sectional shape of the first post; and

a patient-specific tibial alignment guide, the alignment guide including;

a body with an inner anatomy-engaging surface shaped to closely conform and mate with a corresponding tibial joint surface; and

a single guiding receptacle defining an inner channel sized and shaped to non-rotatably receive the second post of the tibial drill guide, wherein when the alignment guide is mounted on the tibial joint surface and the drill guide is connected to the alignment guide, the first post remains exposed outside the alignment guide and provides clearance for a patellar tendon, the first post at a fixed orientation relative to the single guiding receptacle of the alignment guide.

8. The device of claim 7, wherein the second post has a substantially keyhole-shaped cross-section.

9. The device of claim 7, wherein the second post has a substantially rectangular cross-section.

10. The device of claim 7, wherein the inner channel has a substantially keyhole-shaped cross-section.

11. The device of claim 7, wherein the inner channel has a substantially rectangular cross-section.

12. The device of claim 7, wherein the alignment guide includes an arcuate arm having a distal end engageable with the tibia.

13. A device for an orthopedic knee procedure comprising:

a tibial drill guide having a body portion and first and second posts extending from the body portion, the first and second posts having circular cross-sections, the first and second posts defining first and second internal through bores with circular cross-sections, the first post having a longitudinal length shorter than a longitudinal length of the second post; and

a patient-specific tibial alignment guide, the alignment guide including;

a body with an inner anatomy-engaging surface shaped to closely conform and mate with a corresponding tibial joint surface; and

first and second guiding receptacles defining first and second inner channels sized and shaped to receive the first and second posts of the tibial drill guide, the first receptacle being shorter in length than the second receptacle, such that when the alignment guide is mounted on the tibial joint surface and the drill guide is mounted on the alignment guide, the first receptacle and the first post define a clearance gap between the tibia and the device for a patellar tendon.

14. The device of claim 13, wherein the alignment guide further comprises an arcuate arm extending from the body of the alignment guide.

15. The device of claim 13, wherein the first post is positioned on a medial side of the tibia and the second post is positioned on a lateral side of the first post.

16. An orthopedic method comprising:

mounting a patient-specific tibial alignment guide on a tibial joint surface, the alignment guide including a body with an inner surface shaped to closely conform and mate with the tibial joint surface, and a single guiding receptacle defining an inner channel;

engaging the inner surface to the tibial joint surface;

positioning the guiding receptacle on a medial side of the tibial joint surface;

mounting a drill guide on the alignment guide, drill guide having a body portion and first and second posts extending from the body portion, the first and second posts defining first and second internal through bores, the first post having a first cross-sectional shape and the second post having a second cross-sectional shape different than the first cross-sectional shape;

non-rotatably inserting the second post in the inner channel of the guiding receptacle; and

placing the first post medially and closely to a patellar tendon without interfering with the patellar tendon.

17. The method of claim 16, wherein the inner channel of the guiding receptacle includes a keyhole-shaped cross-section.

18. The method of claim 17, wherein the second post of the drill guide includes a keyhole-shaped cross-section.

19. The method of claim 16, the inner channel of the guiding receptacle includes a rectangular cross-section.

20. The method of claim 19, wherein the second post of the drill guide includes a rectangular cross-section.

21. An orthopedic method comprising:

mounting a patient-specific tibial alignment guide on a tibial joint surface, the alignment guide including a body with an inner anatomy-engaging surface shaped to closely conform and mate with the tibial joint surface, and first and second guiding receptacles defining first and second inner channels, the first receptacle being shorter in length than the second receptacle;

engaging the inner surface of the alignment guide to the tibial joint surface;

positioning the medial guiding receptacle on a medial side of the tibial joint surface;

mounting a drill guide on the alignment guide, the drill guide having a body portion and first and second posts extending from the body portion, the first and second posts having circular cross-sections, the first and second posts defining first and second internal through bores, the first post having a longitudinal length shorter than a longitudinal length of the second post;

inserting the first and second posts in the corresponding first and second inner channels of the guiding receptacles; and

providing a clearance between a tibial tuberosity and the first receptacle and first post for a patellar tendon.

22. The method of claim 21, further comprising drilling through the first post without interfering with the patellar tendon.