Artificial acetabular joint replacing device

• US 5,376,126 A
• Filed: 11/12/1993
• Issued: 12/27/1994
• Est. Priority Date: 11/12/1993
• Status: Expired due to Fees

• Current Assignee: Chih-I Lin
• Original Assignee: Chih-I Lin
• Inventors: Lin, Chih-I
• Primary Examiner(s): ISABELLA, DAVID J
• Application Number:
  US08/151,015
• Time in Patent Office: 410 Days
• Field of Search: 623/16, 623/18, 623/19, 623/22, 623/23, 606/60, 606/61, 606/63, 606/65, 606/67, 606/70, 606/72, 606/74
• US Class Current: 623/23.11
• CPC Class Codes: A61B 17/746 the longitudinal elements coupled to a plate opposite the femoral head
• CPC Class Codes: A61B 17/8061 specially adapted for particular bones A61B17/70 and A61B17/74 take precedence
• CPC Class Codes: A61B 17/82 for bone cerclage apparatus for manipulating wires or straps A61B17/8861; wires, bands or straps other than cerclage A61B17/842
• CPC Class Codes: A61B 17/842 Flexible wires, bands or straps A61B17/72, A61B17/82, A61B17/86 take precedence
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61F 2/30739 Devices connected to the proximal part of an endoprosthetic femoral shaft for reinforcing or replacing the trochanters, e.g. the greater trochanter proximal parts of endoprosthetic femoral shafts A61F2/367; non-prosthetic trochanteric devices A61B17/74
• 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 2/367 Proximal or metaphyseal parts of shafts trochanteric devices connected to said proximal parts A61F2/30739
• CPC Class Codes: A61F 2002/30309 hat-shaped or bell-shaped
• CPC Class Codes: A61F 2002/30433 using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30462 retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2002/30578 having apertures, e.g. for receiving fixation screws
• CPC Class Codes: A61F 2002/30785 parallel
• CPC Class Codes: A61F 2002/30787 inclined obliquely with respect to each other
• 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 2220/0041 using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0063 : Three-dimensional shapes
• 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 2310/00179 : Ceramics or ceramic-like structures

Abstract

An artificial acetabular joint replacing device includes an acetabular joint replacing body, an acetabular cap, a fastening piece, one or more fastening screws, and one or more fastening cords. The acetabular joint replacing body is dimensioned to fit over a premended portion of a femur and provided in the bottom portion thereof with at least one cord hole and one or more fastening holes. The fastening piece is provided with one or more fastening holes and cord holes. The fastening screws are used to fasten together the acetabular joint replacing body, the femur and the fastening piece by engaging the fastening holes of the acetabular joint replacing body and the fastening piece, and predrilled fastening holes of the femur. The fastening cords are used to reinforce the fastening of the acetabular joint replacing body, the femur and the fastening piece by passing through the cord holes of the acetabular joint replacing body and the fastening piece.

Claims

1. An artificial acetabular joint replacing device comprising:

an acetabular joint replacing body having a top portion provided with a receiving neck and further having a bottom portion adapted to fit over a femur that has been pre-drilled with at least one fastening hole extending therethrough, said bottom portion being provided with at least one cord hole and at least one fastening hole;

an acetabular cap having a bottom adapted to be mounted on the receiving neck of the acetabular joint replacing body and having a top adapted to be fastened to an acetabular joint;

a fastening piece having at least one fastening hole formed therein, said fastening piece being shaped to be located on a side of the femur opposite to the side to which the acetabular joint replacing body is attached;

fastening screw means extending through said at least one fastening hole of the fastening piece, the at least one predrilled fastening hole of the femur, and said at least one fastening hole of the bottom portion of the acetabular joint replacing body such that the fastening piece, the femur and the acetabular joint replacing body are united; and

at least one fastening cord adapted to pass through said at least one cord hole of the bottom portion of the acetabular joint replacing body, extend about the femur and engage said fastening plate for tightening up the connection of the fastening piece, the femur and the acetabular joint replacing body.

2. The artificial acetabular joint replacing device of claim 1 wherein the bottom portion of the acetabular joint replacing body is cup-shaped and includes a fastening flange at a rim portion thereof, said at least one cord hole and said at least one fastening hole of said acetabular joint replacing body extending through the fastening flange.

3. The artificial acetabular joint replacing device of claim 1 wherein the receiving neck of the acetabular joint replacing body includes a sinking fastening hole at a center portion thereof.

4. The artificial acetabular joint replacing device of claim 1 wherein said fastening screw means comprises a bolt having a threaded portion at one end and an enlarged head at another end thereof, and a nut.

5. The artificial acetabular joint replacing device of claim 1 wherein said fastening plate further includes at least one cord hole through which said at least one fastening cord extends.