Patient-specific femoral version guide

• US 9,241,745 B2
• Filed: 12/13/2012
• Issued: 01/26/2016
• Est. Priority Date: 03/07/2011
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Smith, Aaron P., Meridew, Jason D.
• Primary Examiner(s): Boles, Sameh
• Application Number:
  US13/713,710
• Publication Number:
  US 20130116699A1
• Time in Patent Office: 1,139 Days
• Field of Search: 606/87
• 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 17/151 for corrective osteotomy
• CPC Class Codes: A61B 17/152 for removing a wedge-shaped piece of bone
• CPC Class Codes: A61B 17/164 intramedullary
• CPC Class Codes: A61B 17/1659 Surgical rasps, files, planes, or scrapers
• CPC Class Codes: A61B 17/1717 for applying intramedullary nails or pins
• CPC Class Codes: A61B 17/1735 for rasps or chisels
• CPC Class Codes: A61B 17/175 for preparing the femur for hip prosthesis insertion
• CPC Class Codes: A61B 17/74 Devices for the head or neck or trochanter of the femur trochanteric devices connected to the proximal part of an endoprosthetic femoral shaft A61F2/30739; endoprosthetic internal fixation devices for the head or neck of the femur A61F2/3601
• 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 2034/252 indicating steps of a surgical procedure
• CPC Class Codes: A61B 2090/034 abutting on parts of the device itself
• CPC Class Codes: A61B 2090/062 penetration depth
• CPC Class Codes: A61B 34/10 Computer-aided planning, simulation or modelling of surgical operations
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/4607 of hip femoral endoprostheses
• CPC Class Codes: A61F 2/4657 Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06
• CPC Class Codes: A61F 2002/4668 for measuring angles

Abstract

An orthopedic device includes a monolithic patient-specific guide. The patient-specific guide includes a three-dimensional contact surface preoperatively configured from medical scans of a specific patient as a negative surface of a medial portion of a proximal femoral bone of the patient according to a preoperative surgical plan for the patient. The guide also includes a proximal planar surface configured for guiding a resection of a femoral neck of the patient, and a scale formed on the planar surface. The scale is configured for indicating a preoperatively planned femoral version of a femoral stem implant and deviations therefrom.

Claims

1. An orthopedic device comprising:

a patient-specific guide having;

a three-dimensional contact surface preoperatively configured from medical scans of a specific patient as a negative surface of a medial portion of a proximal femoral bone of the patient according to a preoperative surgical plan for the patient;

a proximal planar surface configured for guiding a resection of a femoral neck of the patient; and

a scale on the planar surface, the scale configured for indicating a preoperatively planned femoral version of a femoral stem implant and deviations therefrom.

2. The orthopedic device of claim 1, further comprising a version assembly including a body and a pointer element, the version assembly configured to indicate intraoperatively an actual femoral stem version on the scale of the patient specific guide when the version assembly is coupled to a fully seated broach for a femoral stem implant.

3. The orthopedic device of claim 2, wherein the body of the version assembly includes an internal bore configured to receive a proximal post of a broach for a femoral stem implant.

4. The orthopedic device of claim 3 in combination with a broach for the femoral stem.

5. The orthopedic device of claim 4, further comprising a trial trunnion for the broach and a trial femoral head for the trunnion.

6. The orthopedic device of claim 5, in combination with a hip replacement implant.

7. The orthopedic device of claim 1, wherein the medial portion includes a lesser trochanter and the contact surface is configured to include a portion negative of the lesser trochanter, wherein the patient-specific guide is monolithic.

8. An orthopedic device comprising:

a patient-specific guide having a three-dimensional contact surface preoperatively configured from medical scans of a specific patient as a negative surface of a medial portion of a proximal femoral bone of the patient according to a preoperative surgical plan for the patient, the medial portion including a lesser trochanter, the patient specific guide having a proximal planar surface configured for guiding a resection of a femoral neck of the patient and a scale on the planar surface, the scale configured for indicating a preoperatively planned femoral version of a femoral stem implant and deviations therefrom;

a broach for a femoral stem implant, the broach having a proximal post; and

a version assembly having a body with an inner bore receiving the post of the broach and a pointer element attached to the body and rotatable with the broach, the pointer element indicating on the scale a femoral version determined by the broach.

9. The orthopedic device of claim 8, wherein the patient-specific guide is disposable and monolithic.

10. The orthopedic device of claim 8, in combination with a plurality of trunnions and a plurality of trial femoral heads.

11. The orthopedic device of claim 8, in combination with a hip replacement implant.