Prosthesis

• US 20030050704A1
• Filed: 07/02/2002
• Published: 03/13/2003
• Est. Priority Date: 01/03/2000
• Status: Abandoned Application

• Current Assignee: Orthoscope, Ltd.
• Original Assignee: Orthoscope, Ltd.
• Inventors: Keynan, Ory
• Application Number:
  US10/188,122
• Publication Number:
  US 20030050704A1
• Time in Patent Office: Days
• US Class Current: 623/22.12
• CPC Class Codes: A61B 17/72 Intramedullary pins, nails or other devices A61B17/744 takes precedence
• CPC Class Codes: A61B 17/7283 with special cross-section of the nail
• CPC Class Codes: A61B 17/744 the longitudinal elements coupled to an intramedullary nail
• CPC Class Codes: A61B 17/746 the longitudinal elements coupled to a plate opposite the femoral head
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61B 90/30 Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
• CPC Class Codes: A61F 2/32 for the hip
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/3601 for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices non-prosthetic internal fixation devices for the femoral head or neck A61B17/74
• CPC Class Codes: A61F 2/3662 Femoral shafts
• CPC Class Codes: A61F 2/4014 Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts
• CPC Class Codes: A61F 2/4081 Glenoid components, e.g. cups
• CPC Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30113 circular
• CPC Class Codes: A61F 2002/30153 rectangular
• CPC Class Codes: A61F 2002/30205 conical
• CPC Class Codes: A61F 2002/30215 Stepped cones, i.e. having discrete diameter changes
• CPC Class Codes: A61F 2002/30224 cylindrical
• CPC Class Codes: A61F 2002/30233 Stepped cylinders, i.e. having discrete diameter changes
• CPC Class Codes: A61F 2002/30408 : Conical threadings
• CPC Class Codes: A61F 2002/30433 : using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30579 : with mechanically expandable devices, e.g. fixation devices
• CPC Class Codes: A61F 2002/30601 : telescopic
• CPC Class Codes: A61F 2002/30604 : modular
• CPC Class Codes: A61F 2002/30616 : Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30738 : Sleeves
• CPC Class Codes: A61F 2002/30797 : internally-threaded
• CPC Class Codes: A61F 2002/3082 : Grooves
• CPC Class Codes: A61F 2002/30827 : Plurality of grooves
• CPC Class Codes: A61F 2002/30828 : parallel
• CPC Class Codes: A61F 2002/30884 : Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
• CPC Class Codes: A61F 2002/342 : the outer shell having circumferential protrusions parallel to the equatorial plane, e.g. circumferential fins or wings
• 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 2002/4635 : using minimally invasive surgery
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0041 : using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2230/0006 : circular
• CPC Class Codes: A61F 2230/0019 : rectangular
• CPC Class Codes: A61F 2230/0067 : conical
• CPC Class Codes: A61F 2230/0069 : cylindrical
• 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 2310/00059 : Chromium or Cr-based alloys
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures
• CPC Class Codes: A61F 2310/00239 : containing zirconia or zirconium oxide ZrO2
• CPC Class Codes: A61F 2310/00353 : Bone cement, e.g. polymethylmethacrylate or PMMA

Abstract

A prosthetic device for an enarthrosis of an extremity, such as the hip joint of the shoulder joint of a human body. The prosthetic device has a ball prosthesis portion and an optional socket prosthesis portion. The ball prosthesis portion is non-inflatable, having a ball member joined to an axial end of a body member via a neck member, and is securable to the extremity. In particular, the ball prosthesis portion has a transverse profile that is adapted for enabling the same to be implanted in the enarthrosis via a suitable portal formed through the lateral cortex of the long bone of the enarthrosis.

Claims

1. A prosthetic device for an enarthrosis of an extremity, such as of the hip joint or of the shoulder joint of a human body, comprising

a substantially non-collapsible ball prosthesis portion comprising a ball member joined to an axial end of a body member via a neck member;

wherein said ball prosthesis portion comprises a transverse profile adapted for enabling at least said ball prosthesis portion to be implanted in said enarthrosis via a suitable portal formed through the lateral cortex of the long bone of said enarthrosis.

2. A prosthetic device as claimed in claim 1, wherein said body member is substantially cylindrical.

3. A prosthetic device as claimed in claim 1, wherein said body member is substantially rectangular.

4. A prosthetic device as claimed in claim 1, wherein said transverse profile of said body member is substantially complementary to the transverse profile of said portal.

5. A prosthetic device as claimed in claim 4, wherein said body member adapted for securement thereof within said portal.

6. A prosthetic device as claimed in claim 1, wherein said ball member comprises an equatorial diameter similar to a transverse diameter of said body member.

7. A prosthetic device as claimed in claim 1, wherein said ball prosthesis portion is substantially rigid.

8. A prosthetic device as claimed in claim 1, wherein said ball prosthesis portion is made from a metallic material including stainless steel, titanium, titanium alloys, and cobalt-chromium-molybdenum alloys.

9. A prosthetic device as claimed in claim 1, wherein said ball prosthesis portion is made from a ceramics material including zirconium oxide.

10. A prosthetic device as claimed claim 1, further comprising securement means for anchoring said ball prosthesis portion with respect to an extremity.

11. A prosthetic device as claimed in claim 10, wherein said securement means comprises a suitable compression screw arrangement comprising a side plate joined to a distal end of said body member, and a compression screw adapted for bringing said side plate into abutting contact with the corresponding long bone of said enarthrosis, and further comprising at least one screw for securing said side plate onto said long bone.

12. A prosthetic device as claimed in claim 10, wherein said securement means comprises a suitable intramedullary nail arrangement comprising an intramedullary nail adapted for securement thereof within a shaft formed in a medullary canal, and mounting means for reversibly mounting said ball prosthesis portion to said intramedullary nail.

13. A prosthetic device as claimed in claim 10, wherein said securement means comprises a suitable telescopic strut arrangement comprising an extendable telescopic strut adapted for securement thereof within a shaft formed in a medullary canal, and mounting means for reversibly mounting said ball prosthesis portion to said telescopic strut arrangement.

14. A prosthetic device as claimed in claim 13, wherein said telescopic strut comprises in its retracted configuration a transverse profile adapted for enabling said ball prosthesis to be implanted in said enarthrosis via said distal portal.

15. A prosthetic device as claimed in claim 13, wherein said telescopic strut comprises an outermost member integrally joined to said distal end of said body member.

16. A prosthetic device as claimed in any one of claims 1 to 15, further comprising a socket prosthesis portion having a proximal end adapted for securement onto the socket of said enarthrosis and a distal side having a concavity adapted for receiving said ball member such as to permit relative rotational movement therebetween.

17. A prosthetic device as claimed in claim 16, wherein said concavity of said socket prosthesis portion has a curvature complementary to the curvature of said ball portion.

18. A prosthetic device as claimed in claim 16, wherein said socket prosthesis portion is made from any suitable material including silicone, polyethylene, polyurethane or ceramic material.

19. A prosthetic device as claimed in claims 1 to 15, adapted for the shoulder joint, wherein said extremity is the corresponding arm.

20. A prosthetic device as claimed in claim 16, adapted for the shoulder joint, wherein said extremity is the corresponding arm.

21. A prosthetic device as claimed in claims 1 to 15, adapted for the hip joint, wherein said extremity is the corresponding leg.

22. A prosthetic device as claimed in claim 16, adapted for tile hip joint, wherein said extremity is the corresponding leg.

23. A method for installing a prosthetic device for the hip joint comprising the steps:

—

(a) Forming a portal through the lateral cortex of the femur opposite the head of the femur and removing the head of the femur;

(b) Providing a prosthetic device as claimed in any one of claims 16 to 18;

(c) Preparing the acetabulum of the hip to receive said socket prosthesis portion and fixing same in place;

(d) Inserting the ball prosthesis portion through the portal and securing said body portion thereof in said portal;

(e) Closure of fascia, subcutis and skin.

24. A method for installing a prosthetic device as claimed in claim 23, wherein said prosthetic device comprises securement means as claimed in claim 10, said method further comprising the steps:

—

(f) Preparing infrastructure in the femur for the securement means of the ball prosthesis portion;

(g) Securing said ball prosthesis portion with respect to the femur via said securement means.

25. A method for installing a prosthetic device as claimed in claim 24, wherein said prosthetic device comprises securement means as claimed in any one of claims 10 and 11 to 15, and wherein said step (f) is executed before step (d) and step (g) is executed after step (d).

26. A method for installing a prosthetic device as claimed in claim 24, wherein said prosthetic device comprises securement means as claimed in claim 11, and wherein steps (f) and (g) are executed after step (d).

27. A method for installing a prosthetic device for the shoulder joint comprising the steps:

—

(h) Forming a portal through the lateral cortex of the humerus opposite the head of the humerus and removing the head of the humerus;

(i) Providing a prosthetic device as claimed in any one of claims 1 to 15;

(j) Inserting the ball prosthesis portion through the portal and securing said body portion thereof in said portal;

(k) Closure of fascia, subcutis and skin.

28. A method for installing a prosthetic device as claimed in claim 27, further comprising the following steps between steps (i) and (j):

(l) Preparing the glenoid of the shoulder to receive said socket prosthesis portion and fixing same in place;

29. A method for installing a prosthetic device as claimed in claim 28, wherein said prosthetic device comprises securement means as claimed in claim 10, said method further comprising the steps:

—

(m) Preparing infrastructure in the humerus for the securement means of the ball prosthesis portion;

(n) Securing said ball prosthesis portion with respect to the humerus via said securement means;

30. A method for installing a prosthetic device as claimed in claim 29, wherein said prosthetic device comprises securement means as claimed in any one of claims 10 and 12 to 15, and wherein said step (m) is executed before step (j) and step (n) is executed after step (j).

31. A method for installing a prosthetic device as claimed in claim 29, wherein said prosthetic device comprises securement means as claimed in claim 11, and wherein steps (m) and (n) are executed after step (j).