Patient-specific orthopedic instruments

• US 8,591,516 B2
• Filed: 11/29/2010
• Issued: 11/26/2013
• Est. Priority Date: 02/27/2006
• Status: Expired due to Fees

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Metzger, Robert, Catanzarite, Joshua B., May, Brian M.
• Primary Examiner(s): Lawson, Matthew
• Assistant Examiner(s): LEE, SI M
• Application Number:
  US12/955,361
• Publication Number:
  US 20110071533A1
• Time in Patent Office: 1,093 Days
• Field of Search: 606 87- 89, 606/96, 606/102, 606/104, 606/86.R
• US Class Current: 606/88
• CPC Class Codes: A61B 17/155 Cutting femur
• 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 2017/568 produced with shape and dimensions specific for an individual patient
• CPC Class Codes: A61B 2034/105 Modelling of the patient, e.g. for ligaments or bones
• 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
• CPC Class Codes: A61F 2/30942 for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2002/30014 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/30561 breakable or frangible
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30617 Visible markings for adjusting, locating or measuring
• CPC Class Codes: A61F 2002/30952 using CAD-CAM techniques or NC-techniques
• CPC Class Codes: A61F 2002/4662 for measuring penetration depth
• CPC Class Codes: A61F 2002/4668 for measuring angles
• CPC Class Codes: A61F 2002/4677 using a guide wire

Abstract

An orthopedic device includes a patient-specific alignment guide operable for preparing a bone of a patient for resection during joint arthroplasty. The alignment guide includes a patient-specific bone engagement surface complementary to a surface of the bone of the patient and imaged from a bone scan of the patient. The alignment guide includes a plurality of guiding bores, and a plurality of alignment pins received through corresponding guiding bores for attaching the alignment guide to the bone. The alignment pins are resorbable and can be cut off during a resection of the bone.

Claims

1. An orthopedic device comprising:

a patient-specific alignment guide operable for preparing a bone of a patient for resection during joint arthroplasty, the alignment guide including a patient-specific bone engagement surface configured to be complementary to a surface of the bone of the patient, the alignment guide including a plurality of guiding bores;

a plurality of alignment pins receivable through corresponding guiding bores for attaching the alignment guide to the bone, wherein the alignment pins are cannulated, resorbable and configured to be cut off during a resection of the bone; and

a cutting block including a plurality of pins configured to be receivable into corresponding cut-off alignment pins for another resection of the bone.

2. The orthopedic device of claim 1, wherein the alignment guide is configured to be cut off during a resection of the bone.

3. The orthopedic device of claim 1, wherein the alignment guide is a femoral alignment guide for a distal femur and is configured to be cut off during a distal resection in which a pair of distal pins from the plurality of alignment pins are also cut off.

4. The orthopedic device of claim 3, further comprising a distal cutting block mounted on a pair of anterior alignment pins from the plurality of alignment pins.

5. An orthopedic device comprising:

a patient-specific femoral alignment guide operable for preparing a distal femur of a patient for a resection during joint arthroplasty, the femoral alignment guide including a patient-specific engagement surface configured to be complementary to an anterior-distal surface of the distal femur, the femoral alignment guide including first and second anterior guiding formations defining first and second anterior guide bores and first and second distal guiding formations defining first and second distal guide bores;

a plurality of cannulated alignment pins including anterior and distal alignment pins receivable through the anterior and distal guide bores for attaching the femoral alignment guide to the distal femur, wherein the alignment pins are resorbable and configured to be cut off from the distal femur; and

a cutting block including a plurality of pins configured to be received into corresponding cut-off distal alignment pins.