Instruments for use in disassembling implants

• US 9,603,649 B2
• Filed: 03/15/2013
• Issued: 03/28/2017
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Depuy Ireland Unlimited Company (Johnson & Johnson)
• Original Assignee: Depuy Ireland Unlimited Company (Johnson & Johnson)
• Inventors: Matyas, Aaron J., Steffe, Kyle D., Chaney, Rebecca L., Hathaway, Tyler S., Cook, Michael A.
• Primary Examiner(s): LAWSON, MATTHEW JAMES
• Application Number:
  US13/837,465
• Publication Number:
  US 20140276883A1
• Time in Patent Office: 1,474 Days
• Field of Search: 606/104
• US Class Current: 1/1
• CPC Class Codes: A61B 17/921 for intramedullary devices
• CPC Class Codes: A61F 2/3859 Femoral components
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2/461 of knees
• CPC Class Codes: A61F 2/4637 for connecting or disconnecting two parts of a prosthesis
• CPC Class Codes: A61F 2002/30332 Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30507 using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/4619 for extraction
• CPC Class Codes: A61F 2002/4627 with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
• CPC Class Codes: A61F 2002/4629 connected to the endoprosthesis or implant via a threaded connection
• CPC Class Codes: A61F 2002/4641 for disconnecting

Abstract

An orthopedic surgical instrument for use in disassembling an orthopedic prosthesis includes a main component, a rod, and a spindle. The main component has a housing and an elongated body extending from the housing with a passageway is defined in the elongated body. The rod has an elongated shaft, with a greater length than the elongated body, extending from the head of the rod and configured to pass through the main component. The spindle threads into the housing to move the rod along a longitudinal axis.

Claims

1. An orthopaedic surgical instrument comprising:

a main component including a housing and an elongated body extending from the housing, the housing and the elongated body defining a longitudinal axis, wherein a passageway is defined in the elongated body along the longitudinal axis,

a rod component including (i) a head configured to be received in the housing of the main component and (ii) an elongated shaft extending from the head, configured to pass through the elongated body of the main component, and

a spindle component including (i) a threaded body configured to engage the head of the rod component to move the rod component along the longitudinal axis as the threaded body is threaded into the housing, and (ii) a handle body opposite the threaded body,

wherein the elongated shaft has a length greater than a length of the elongated body of the main component,

wherein the head of the rod component has a diameter greater than a diameter of the passageway of the elongated body of the main component, and

wherein the handle body is configured to receive a handle component for threading the spindle component.

2. The orthopaedic surgical instrument of claim 1, wherein the rod component is selected from a plurality of rod components, each rod component of the plurality of rod components having an elongated shaft with a different length.

3. The orthopaedic surgical instrument of claim 1, wherein an end of the elongated body of the main component opposite the housing has a threaded outer surface.

4. The orthopaedic surgical instrument of claim 1, wherein the spindle component includes an aperture defined at an end of the threaded body, the aperture sized to fit the head of the rod component.

5. The orthopaedic surgical instrument of claim 4, wherein a diameter of the aperture is less than a diameter of the spindle component.

6. The orthopaedic surgical instrument of claim 1, wherein an outer surface of the housing of the main component is shaped to match a connection surface of a wrench component.

7. The orthopaedic surgical instrument of claim 6, wherein the outer surface is shaped to match a connection surface of a hex wrench.