Patient-specific femoral version guide

• US 9,743,935 B2
• Filed: 12/17/2015
• Issued: 08/29/2017
• 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 RAAFAT
• Application Number:
  US14/973,057
• Publication Number:
  US 20160100845A1
• Time in Patent Office: 621 Days
• Field of Search: None
• 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. A patient-specific orthopedic guide comprising:

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

a planar surface configured for guiding a resection of a femoral neck of the patient, the planar surface configured to be disposed proximal of the lesser trochanter of the patient and configured to extend along less than an entirety of the femoral neck; and

a scale on the planar surface.

2. The orthopedic guide of claim 1, wherein the scale is configured for indicating a preoperatively planned femoral version of a femoral stem implant and deviations therefrom.

3. The orthopedic guide of claim 2, 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.

4. The orthopedic guide of claim 3, 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.

5. The orthopedic guide of claim 1, wherein the patient-specific guide is monolithic.

6. A patient-specific orthopedic guide comprising:

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

a planar surface configured for guiding a resection of a femoral neck of the patient, the planar surface configured to be disposed proximal of the lesser trochanter of the patient and configured to extend along less than an entirety of the femoral neck; and

a broach for a femoral stem implant.

7. The orthopedic guide of claim 6, further comprising a trial trunnion for the broach and a trial femoral head for the trunnion.

8. An orthopedic assembly 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 lesser trochanter of a proximal femoral bone of the patient according to a preoperative surgical plan for the patient, the patient specific guide having a proximal planar surface configured for guiding a resection of a femoral neck of the patient, the proximal planar surface configured to extend along less than an entirety of the femoral neck;

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.

9. The orthopedic assembly of claim 8, wherein the patient-specific guide includes a scale on the planar surface, the scale is configured for indicating a preoperatively planned femoral version of a femoral stem implant and deviations therefrom.

10. The orthopedic assembly of claim 9, wherein the version assembly includes a pointer element configured to be attached to the body and rotatable with the broach, the pointer element indicating on the scale a femoral version determined by the broach.

11. The orthopedic assembly of claim 8, further in combination with a plurality of trunnions and a plurality of trial femoral heads.