DISTAL REAMER FOR USE DURING AN ORTHOPAEDIC SURGICAL PROCEDURE TO IMPLANT A REVISION HIP PROSTHESIS

• US 20120259338A1
• Filed: 04/05/2012
• Published: 10/11/2012
• Est. Priority Date: 04/06/2011
• Status: Active Grant

• Current Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Inventors: Carr, Jonathan E., Hood, Megan A., McCleary, Larry G., Fortin, Michael J.
• Granted Patent: US 10,064,725 B2
• Time in Patent Office: Days
• US Class Current: 606/80
• CPC Class Codes: A61B 17/1637 Hollow drills or saws producing a curved cut, e.g. cylindrical A61B10/025, A61B17/1695 take precedence
• CPC Class Codes: A61B 17/164 intramedullary
• CPC Class Codes: A61B 17/1659 Surgical rasps, files, planes, or scrapers
• CPC Class Codes: A61B 17/1668 for the upper femur A61B17/164 takes precedence
• CPC Class Codes: A61B 2017/00464 for use with different instruments with hole for different instruments A61B2017/22072
• CPC Class Codes: A61B 2090/062 penetration depth
• CPC Class Codes: A61F 2/30734 Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/3662 Femoral shafts
• CPC Class Codes: A61F 2/4607 of hip femoral endoprostheses
• CPC Class Codes: A61F 2/4637 for connecting or disconnecting two parts of a prosthesis
• CPC Class Codes: A61F 2/4657 Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• CPC Class Codes: A61F 2002/30235 tubular, e.g. sleeves
• 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 2002/30515 using a locking wedge or block
• CPC Class Codes: A61F 2002/3054 about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30617 Visible markings for adjusting, locating or measuring
• CPC Class Codes: A61F 2002/30738 : Sleeves
• CPC Class Codes: A61F 2002/3625 : Necks
• CPC Class Codes: A61F 2002/3652 : Connections of necks to shafts
• CPC Class Codes: A61F 2002/3674 : Connections of proximal parts to distal parts
• CPC Class Codes: A61F 2002/4622 : having the shape of a forceps or a clamp
• 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 2002/4662 : for measuring penetration depth
• CPC Class Codes: A61F 2002/4668 : for measuring angles
• CPC Class Codes: A61F 2002/4681 : by applying mechanical shocks, e.g. by hammering

Abstract

A modular femoral prosthesis for use during performance of a hip revision procedure includes a proximal body component, a distal stem component, and a locking bolt. Surgical instruments and methods for use in implanting such a modular femoral prosthesis are disclosed.

Claims

1. A distal reamer operable to ream an intramedullary canal of a patient'"'"'s femur during a surgical procedure to implant a distal stem component of a modular orthopaedic hip prosthesis, comprising:

an elongated shank having (i) a cutting head formed in a distal end of the elongated shank, the cutting head having a plurality of helical cutting flutes arranged in a geometry that corresponds with the geometry of the distal stem component, and (ii) a drive connector formed in a sidewall positioned at an opposite, proximal end of the elongated shank, the drive connector having (a) a female drive socket, and (b) a number of locking slots formed in the sidewall so as to open into the female drive socket.

2. The distal reamer of claim 1, wherein the locking slots comprise L-shaped locking slots.

3. The distal reamer of claim 1, wherein the locking slots are formed in the sidewall on opposite sides of the female drive socket.

4. The distal reamer of claim 1, wherein the female drive socket comprises a female hex drive socket.

5. A distal reamer operable to ream an intramedullary canal of a patient'"'"'s femur during a surgical procedure to implant a distal stem component of a modular orthopaedic hip prosthesis, comprising:

a cutting head having a plurality of helical cutting flutes arranged in a geometry that corresponds with the geometry of the distal stem component,

a female drive socket, and

a threaded bore having a superior end that opens into the drive socket and extending inferiorly away therefrom.

6. The distal reamer of claim 5, further comprises a number of locking slots arranged around, and opening into, the female drive socket.

7. The distal reamer of claim 6, wherein the locking slots comprise L-shaped locking slots.

8. The distal reamer of claim 6, wherein the locking slots are formed in the sidewall on opposite sides of the female drive socket.

9. The distal reamer of claim 5, wherein the female drive socket comprises a female hex drive socket.

10. A surgical instrument assembly operable to ream an intramedullary canal of a patient'"'"'s femur during a surgical procedure to implant a distal stem component of a modular orthopaedic hip prosthesis, comprising:

a distal reamer having (i) a cutting head that includes a plurality of helical cutting flutes arranged in a geometry that corresponds with the geometry of the distal stem component, and (ii) a female drive socket, and

an extension tool having (i) a connector configured to couple the extension tool to a rotary drive source, and (ii) a drive spline positioned in, and engaged with, the female drive socket of the distal reamer such that rotation of the extension tool causes rotation of the distal reamer.

11. The surgical instrument assembly of claim 10, wherein:

the distal reamer further has a number of locking slots arranged around, and opening into, the female drive socket, and

the extension tool further has a number of locking jaws positioned in the locking slots of the distal reamer.

12. The surgical instrument assembly of claim 11, wherein

the locking slots are formed on opposite sides of the female drive socket, and

the locking jaws are positioned on opposite sides of the drive spline.

13. The surgical instrument of claim 10, wherein the connector of the extension tool is configured to fit in a chuck of a rotary power tool.

14. The distal reamer of claim 10, wherein the female drive socket comprises a female hex drive socket.