Method and apparatus for hip replacement

• US 8,579,985 B2
• Filed: 12/22/2011
• Issued: 11/12/2013
• Est. Priority Date: 12/07/2006
• Status: Active Grant

• Current Assignee: IHIP Surgical, LLC
• Original Assignee: IHIP Surgical, LLC
• Inventors: Podolsky, Anatol, Garbuzov, Yuri
• Primary Examiner(s): STEWART, ALVIN J
• Application Number:
  US13/335,216
• Publication Number:
  US 20120130502A1
• Time in Patent Office: 691 Days
• Field of Search: 623/22.11, 623/22.36, 623 224- 2246, 623 2311- 2315, 623 1911- 1914, 606/62, 606/64, 606/65, 606/98
• US Class Current: 623/22.42
• CPC Class Codes: A61B 17/164 intramedullary
• CPC Class Codes: A61B 17/1666 for the acetabulum
• CPC Class Codes: A61B 17/1668 for the upper femur A61B17/164 takes precedence
• CPC Class Codes: A61B 17/1684 for the shoulder
• CPC Class Codes: A61B 17/1717 for applying intramedullary nails or pins
• CPC Class Codes: A61B 17/1721 for applying pins along or parallel to the axis of the femoral neck
• CPC Class Codes: A61B 17/175 for preparing the femur for hip prosthesis insertion
• CPC Class Codes: A61B 17/7266 with fingers moving radially outwardly
• CPC Class Codes: A61B 17/7283 with special cross-section of the nail
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61B 17/888 the driver bit acting on the central region of the screw head
• CPC Class Codes: A61B 2017/924 Impact element driving means
• CPC Class Codes: A61F 2/30749 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2/32 for the hip
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2/3609 Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts A61F2/3601 takes precedence
• CPC Class Codes: A61F 2/3662 Femoral shafts
• 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 2/4609 of acetabular cups
• CPC Class Codes: A61F 2002/30011 differing in porosity
• CPC Class Codes: A61F 2002/30332 : Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30405 : made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/30433 : using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30448 : using adhesives
• CPC Class Codes: A61F 2002/30451 : soldered or brazed or welded
• CPC Class Codes: A61F 2002/30476 : locked by an additional locking mechanism
• CPC Class Codes: A61F 2002/30507 : using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/30594 : 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 2002/30673 : Lubricating means, e.g. synovial pocket
• CPC Class Codes: A61F 2002/30738 : Sleeves
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/3079 : Stepped or enlarged apertures, e.g. having discrete diameter changes
• CPC Class Codes: A61F 2002/30797 : internally-threaded
• CPC Class Codes: A61F 2002/30894 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30904 : serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/30906 : shot- sand- or grit-blasted
• CPC Class Codes: A61F 2002/30909 : Nets
• CPC Class Codes: A61F 2002/3401 : with radial apertures, e.g. radial bores for receiving fixation screws
• CPC Class Codes: A61F 2002/3403 : Polar aperture
• CPC Class Codes: A61F 2002/3412 : with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface
• CPC Class Codes: A61F 2002/3446 : Single cups
• CPC Class Codes: A61F 2002/3611 : Heads or epiphyseal parts of femur
• CPC Class Codes: A61F 2002/3625 : Necks
• CPC Class Codes: A61F 2002/3631 : with an integral complete or partial peripheral collar or bearing shoulder at its base
• CPC Class Codes: A61F 2002/365 : Connections of heads to necks
• CPC Class Codes: A61F 2002/3652 : Connections of necks to shafts
• CPC Class Codes: A61F 2002/369 : Stepped shaft, i.e. having discrete diameter changes
• CPC Class Codes: A61F 2002/4629 : connected to the endoprosthesis or implant via a threaded connection
• CPC Class Codes: A61F 2002/4635 : using minimally invasive surgery
• CPC Class Codes: A61F 2002/4668 : for measuring angles
• CPC Class Codes: A61F 2002/4681 : by applying mechanical shocks, e.g. by hammering
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• 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 2220/005 : using adhesives
• CPC Class Codes: A61F 2220/0058 : soldered or brazed or welded
• CPC Class Codes: A61F 2250/0024 : made from both porous and non-porous parts, e.g. adjacent parts
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: A61F 2310/00131 : Tantalum or Ta-based alloys
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures
• CPC Class Codes: A61F 2310/00203 : containing alumina or aluminium oxide

Abstract

Methods and apparatus for orthopedic replacement of the hip through three incisions with a modular prosthetic system assembled in vivo while substantially preserving muscles and soft tissues around the hip joint resulting in reduced healing time and decreased risk of dislocation. A prosthetic femoral stem is inserted into the femur. A prosthetic femoral neck is inserted from a point along the side of the patient'"'"'s body and into the side of the femur and through a lateral bore in the prosthetic femoral stem to join the prosthetic femoral head. The methods and apparatus include structures and techniques for fixing or enhancing interconnection of implant components, such as by increasing the interconnection in an interference fit with one or more tapers, threads, and/or cooling of components prior to assembly.

Claims

1. A modular prosthetic hip system for hip arthroplasty, comprising:

a prosthetic femoral stem implant component comprising a neck implant bore, the prosthetic femoral stem implant component configured to be inserted in a femur such that at least a portion of a proximal end of the prosthetic femoral stem implant component is positioned within a trochanteric region of the femur and a distal end of the prosthetic femoral stem implant component is positioned in an intramedullary canal of the femur;

a prosthetic femoral neck implant component comprising;

a bore engaging portion configured for lateral advancement through the neck implant bore and for fixed attachment to the neck implant bore of the prosthetic femoral stem implant component, the bore engaging portion comprising at least one tapered surface for fixedly attaching the prosthetic femoral neck implant to the prosthetic femoral stem implant component with at least one interference fit; and

a head engaging end,

wherein the bore engaging portion further comprises a thread for engagement of the neck implant bore to the prosthetic femoral neck implant, the thread configured to lock the femoral neck implant component in the femoral stem implant component with an interference fit between the thread and the at least one tapered surface; and

a prosthetic femoral head implant component attachable to the head engaging end of the prosthetic femoral neck implant component, the prosthetic femoral head implant configured to fit rotatably within an acetabulum.

2. The prosthetic hip system of claim 1, the femoral neck implant component comprising:

a distal neck portion; and

a proximal cap portion,

the distal neck portion comprising the head engaging end, the bore engaging portion, and a cap securing end,

the bore engaging portion comprising a Morse taper and a thread,

the cap securing end comprising an external cap thread,

the proximal cap portion comprising an internal cap thread for adjustable engagement with the external cap thread.

3. The prosthetic hip system of claim 2, the cap securing end comprising a distal neck engaging portion configured for releasable connection to a distal neck portion driving tool, and the proximal cap portion comprising a proximal cap end engagement structure configured for releasable connection to a proximal cap portion driving tool.

4. The prosthetic hip system of claim 2, wherein the proximal cap portion further comprises a cap bore engaging portion configured for engagement with the neck implant bore of the femoral stem implant component, at least a portion of the cap bore engaging portion having a tapered surface.

5. The prosthetic hip system of claim 1, wherein the prosthetic femoral head implant is configured to fit rotatably within a prosthetic acetabular cup in the acetabulum.

6. The prosthetic hip system of claim 1, further comprising a sleeve implant component configured for anchoring the stem implant component to a bone.

7. A modular prosthetic hip system for hip arthroplasty, comprising:

a prosthetic femoral stem implant component with a neck implant bore comprising a bore thread and at least one tapered surface, the prosthetic femoral stem implant component configured to be inserted in a femur such that at least a portion of a proximal end of the prosthetic femoral stem implant component is positioned within a trochanteric region of the femur and a distal end of the prosthetic femoral stem implant component is positioned in an intramedullary canal of the femur;

a prosthetic femoral neck implant component comprising;

a bore engaging portion configured to fixedly join the neck implant bore of the prosthetic femoral stem implant component, the bore engaging portion comprising a bore thread and at least one tapered surface for fixedly attaching the prosthetic femoral neck implant to the prosthetic femoral stem implant component with at least one interference fit; and

a head engaging end; and

a prosthetic femoral head implant component attachable to the head engaging end of the prosthetic femoral neck implant component, the prosthetic femoral head implant configured to fit rotatably within an acetabulum.

8. The prosthetic hip system of claim 7, the femoral neck implant component comprising:

a distal neck portion; and

a proximal cap portion,

the distal neck portion comprising the head engaging end, a bore engaging portion, and a cap securing end,

the bore engaging portion comprising the at least one taper and the bore thread,

the cap securing end comprising an external cap thread,

the proximal cap portion comprising an internal cap thread for adjustable engagement with the external cap thread.

9. The prosthetic hip system of claim 8, the cap securing end comprising an a distal neck engaging portion configured for releasable connection to a distal neck portion driving tool, and the proximal cap portion comprising a proximal cap end engagement structure configured for releasable connection to a proximal cap portion driving tool.

10. The prosthetic hip system of claim 8, wherein the proximal cap portion further comprises a cap bore engaging portion configured for engagement with the neck implant bore of the femoral stem implant component, at least a portion of the cap bore engaging portion having a tapered surface.

11. A modular prosthetic hip system for hip arthroplasty, comprising:

a prosthetic femoral stem implant component comprising a neck implant bore, the prosthetic femoral stem implant component configured to be inserted in a femur such that at least a portion of a proximal end of the prosthetic femoral stem implant component is positioned within a trochanteric region of the femur and a distal end of the prosthetic femoral stem implant component is positioned in an intramedullary canal of the femur;

a prosthetic femoral head implant component configured to fit rotatably within an acetabulum; and

a prosthetic femoral neck implant component comprising a distal neck portion and a proximal cap portion,

the distal neck portion comprising a head engaging end, a bore engaging portion, and a cap securing end,

the head engaging end attachable to the prosthetic femoral head implant component,

the bore engaging portion configured for lateral advancement through the neck implant bore and for fixed attachment to the neck implant bore of the prosthetic femoral stem implant component, p1 the bore engaging portion comprising a thread and at least one tapered surface for fixedly attaching the prosthetic femoral neck implant to the prosthetic femoral stem implant component with at least one interference fit, wherein the at least one tapered surface is a Morse taper,

the cap securing end comprising an external cap thread,

the proximal cap portion comprising an internal cap thread for adjustable engagement with the external cap thread.

12. The prosthetic hip system of claim 11, wherein the cap securing end further comprises a distal neck engaging portion configured for releasable connection to a distal neck portion driving tool.

13. The prosthetic hip system of claim 11, wherein the proximal cap portion further comprises a proximal cap end engagement structure configured for releasable connection to a proximal cap portion driving tool.

14. The prosthetic hip system of claim 11, wherein the prosthetic femoral head implant is configured to fit rotatably within a prosthetic acetabular cup in the acetabulum.

15. The prosthetic hip system of claim 11, further comprising a sleeve implant component configured for anchoring the stem implant component to a bone.