Surgical instruments for hip revision

• US 5,342,366 A
• Filed: 02/19/1992
• Issued: 08/30/1994
• Est. Priority Date: 02/19/1992
• Status: Expired due to Term

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Incorporated (Zimmer Biomet Holdings, Inc.)
• Inventors: Whiteside, Leo A., Wiley, Roy C.
• Primary Examiner(s): ISABELLA, DAVID J
• Application Number:
  US07/838,528
• Time in Patent Office: 923 Days
• Field of Search: 623/16, 623/18, 623/20, 623/22, 623/23, 606/102, 606/86, 606/87, 606/96
• US Class Current: 606/86.00R
• 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 17/175 for preparing the femur for hip prosthesis insertion
• CPC Class Codes: A61B 90/06 Measuring instruments not otherwise provided for
• 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 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/367 Proximal or metaphyseal parts of shafts trochanteric devices connected to said proximal parts A61F2/30739
• CPC Class Codes: A61F 2/3672 Intermediate parts of shafts
• CPC Class Codes: A61F 2/3676 Distal or diaphyseal parts of shafts
• 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 2002/30332 Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30339 Double cones, i.e. connecting element having two conical connections, one at each of its opposite ends
• CPC Class Codes: A61F 2002/30433 using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30594 slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30617 Visible markings for adjusting, locating or measuring
• CPC Class Codes: A61F 2002/30797 internally-threaded
• CPC Class Codes: A61F 2002/30904 serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/30963 using templates, e.g. grid charts
• CPC Class Codes: A61F 2002/3611 : Heads or epiphyseal parts of femur
• CPC Class Codes: A61F 2002/3625 : Necks
• CPC Class Codes: A61F 2002/365 : Connections of heads to necks
• CPC Class Codes: A61F 2002/4619 : for extraction
• CPC Class Codes: A61F 2220/0033 : made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2220/0041 : using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2250/0097 : Visible markings, e.g. indicia

Abstract

A modular hip prosthesis operable to engage the cortical material in a host femur having a metaphysis and an intramedullary canal. The modular hip prosthesis includes a modular metaphyseal segment which is able to be inserted into the metaphysis of the host femur. The modular metaphyseal segment includes an axial cone portion and a cervical cone portion. The modular hip prosthesis further includes a modular diaphyseal segment which is able to be inserted into the intramedullary canal and being removably secured to the modular metaphyseal segment. Finally, the modular hip prosthesis includes a modular head which is able to engage the modular metaphyseal segment and is detached from the modular diaphyseal segment.

Also disclosed is surgical instrumentation for use in implanting a medical device. The surgical instrumentation includes a template having a plurality of scaled markings disposed thereon. The surgical instrumentation also includes a plurality of surgical instruments also having scaled markings disposed thereon. The positions of the scaled markings on the surgical instruments have a correspondence with the position of the scaled markings on the template.

Claims

1. A set of surgical instruments for use in implanting a hip prosthesis in a host femur having a neck portion, said hip prosthesis including a diaphyseal segment and a metaphyseal segment, said set of surgical instruments comprising:

a distal canal reamer operable to ream a cavity in said host femur for receiving said diaphyseal segment of said hip prosthesis;

a metaphyseal reamer operable to ream a cavity in said host femur for receiving a portion of said metaphyseal segment;

a femoral neck reamer operable during lateral displacement thereof to ream said neck portion of said host femur for receiving a portion of said metaphyseal segment said femoral neck reamer having an outer sleeve; and

a femoral neck cutting guide operable to be used in conjunction with said femoral neck reamer to ream said neck portion, said femoral neck cutting guide including a medially extending alignment arm being operable to guide lateral displacement of said femoral neck reamer.

2. The set of surgical instruments according to claim 1 wherein the size of said outer sleeve is proportional to the size of said metaphyseal segment.

3. The set of surgical instruments according to claim 1, wherein said outer sleeve of said femoral neck reamer is operable to engage said femoral neck cutting guide so as to cause said femoral neck femur to form a cavity in said host femur having a substantially uniform cross-section in the anterior-posterior view while having a varying cross-section in the medial-lateral view.

4. The set of surgical instruments according to claim 1, further including template having a plurality of scaled markings disposed thereon which are operable to establish the proper location of said hip prosthesis within said host femur, said femoral neck cutting guide further comprises a plurality of scaled markings which positionally correspond to said scaled markings on said template.

5. The set of surgical instruments according to claim 1, further including a distal stem driver for inserting said diaphyseal segment into said host femur.