Patient-specific computed tomography guides

• US 9,579,112 B2
• Filed: 06/29/2015
• Issued: 02/28/2017
• Est. Priority Date: 03/04/2010
• Status: Active Grant

• Current Assignee: Materialise NV
• Original Assignee: Materialise NV
• Inventors: Catanzarite, Joshua B., Schoenefeld, Ryan J.
• Primary Examiner(s): Manahan, Todd E
• Assistant Examiner(s): SHIRSAT, MARCELA
• Application Number:
  US14/754,286
• Publication Number:
  US 20150297249A1
• Time in Patent Office: 610 Days
• Field of Search: 606/86.R, 606 87- 90, 606 96- 98, 606/102, 606/104
• US Class Current: 1/1
• CPC Class Codes: A61B 17/155 Cutting femur
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 17/56 Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
• CPC Class Codes: A61B 2017/568 produced with shape and dimensions specific for an individual patient
• CPC Class Codes: A61B 2034/108 Computer aided selection or customisation of medical implants or cutting guides
• CPC Class Codes: A61B 34/10 Computer-aided planning, simulation or modelling of surgical operations

Abstract

A patient-specific tibial pin guide for placement on a tibia during a joint arthroplasty procedure on a patient is disclosed. The tibial pin guide includes a patient-specific inner surface having a first offset portion and a second offset portion. The first offset portion is configured to be offset from and mimic a first bone surface. The first offset portion of the patient-specific inner surface is shaped to form a gap to accommodate soft tissue overlying a proximal surface of the tibia of the patient. The second offset portion of the patient-specific inner surface is shaped to provide clearance for a patella tendon of the patient. The tibial pin guide also has a first patient-specific contact area configured for direct bone registration without intervening soft tissue and a second patient-specific contact area that is configured for direct bone registration without intervening soft tissue. The second patient-specific contact area is non-contiguous with the first patient-specific contact area.

Claims

1. A patient-specific tibial pin guide for placement on a tibia during a joint arthroplasty procedure on a patient, comprising:

a patient-specific inner surface having a first offset portion and a second offset portion, wherein the first offset portion is configured to be offset from and mimic a first bone surface, wherein the first offset portion of the patient-specific inner surface is shaped to form a gap to accommodate soft tissue overlying a proximal surface of the tibia of the patient, and wherein the second offset portion of the patient-specific inner surface is shaped to provide clearance for a patella tendon of the patient;

a first patient-specific contact area formed on the patient-specific inner surface, wherein the first patient-specific contact area is configured for direct bone registration without intervening soft tissue;

a second patient-specific contact area formed on the patient-specific inner surface, wherein the second patient-specific contact area is configured for direct bone registration without intervening soft tissue, wherein the second patient-specific contact area is non-contiguous with the first patient-specific contact area.

2. The patient-specific tibial pin guide of claim 1, wherein the first patient-specific contact area is configured for direct bone registration without intervening soft tissue on an anterior surface of the tibia.

3. The patient-specific tibial pin guide of claim 2, further comprising an anterior flange extending distally away from the anterior surface of the tibia.

4. The patient-specific tibial pin guide of claim 3, wherein the anterior flange is shaped to follow the tibial tubercle without interfering with it.

5. The patient-specific tibial pin guide of claim 2, further comprising a score line on the outer surface of the tibial pin guide.

6. The tibial pin guide of claim 5, wherein the score line is positioned on the tibial pin guide such that it is adjacent to the first patient specific contact area.

7. The patient-specific tibial pin guide of claim 1, wherein the second patient-specific contact area is configured for direct bone registration without intervening soft tissue on a spine area of the tibia.

8. The patient-specific tibial pin guide of claim 1, further comprising a pair of proximal guiding formations having a guiding bore configured to receive surgical instruments for insertion into the proximal surface of the tibia.

9. The patient-specific tibial pin guide of claim 8, further comprising an extension extending from the patient-specific inner surface, wherein the extension comprises a patient-specific contact surface configured for direct bone registration without intervening soft tissue.

10. The patient-specific tibial pin guide of claim 1, further comprising a cutout configured to provide patella tendon clearance.

11. The patient-specific tibial pin guide of claim 1, further comprising a pair of anterior guiding formations having a guiding bore configured to receive surgical instruments for insertion into the anterior surface of the tibia.

12. The patient-specific tibial pin guide of claim 11, further comprising a bridge element extending between the pair of anterior guiding formations.