Hip joint implant

• US 4,828,566 A
• Filed: 02/04/1987
• Issued: 05/09/1989
• Est. Priority Date: 02/18/1986
• Status: Expired due to Term

• Current Assignee: Sulzer Brothers, Ltd (Sulzer AG)
• Original Assignee: Sulzer Brothers, Ltd (Sulzer AG)
• Inventors: Griss, Peter
• Primary Examiner(s): Apley, Richard J.
• Assistant Examiner(s): Isabella, David J.
• Application Number:
  US07/011,064
• Time in Patent Office: 825 Days
• Field of Search: 623/16, 623/17, 623/18, 623/19, 623/20, 623/21, 623/22, 623/23
• US Class Current: 623/23.28
• CPC Class Codes: A61F 2/30907 Nets or sleeves applied to surface of prostheses or in cement
• 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 2/4607 of hip femoral endoprostheses
• CPC Class Codes: A61F 2002/30131 horseshoe- or crescent- or C-shaped or U-shaped
• CPC Class Codes: A61F 2002/30433 using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30451 soldered or brazed or welded
• CPC Class Codes: A61F 2002/30909 Nets
• CPC Class Codes: A61F 2002/368 with lateral apertures, bores, holes or openings, e.g. for reducing the mass, for receiving fixation screws or for communicating with the inside of a hollow shaft
• CPC Class Codes: A61F 2002/4619 for extraction
• CPC Class Codes: A61F 2220/0041 using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped

Abstract

The shank is provided with a recess in the proximal medial region and a U-shaped wire mesh structure is secured within the recess. The wire mesh structure provides for an ingrowth of bone tissue at the medial narrow side of the shank and an absorption of shear micro movements between a bone and the implant. The mesh structure can be secured in place by rivets or by weld seams.

Claims

1. A hip joint implant comprising

a shank having a blade-like portion extending in conically widening manner form a distal end toward a proximal end with a lenticular disk shaped cross-section in a proximal medial region, a neck extending from said blade-like portion at said proximal end and a pin for receiving a joint head at said proximal end;

a U-shaped wire mesh structure secured to said proximal medial region of said blade-like portion and about a medical narrow side of said blade-like portion; and

at least one rivet passing through said mesh structure and said shank for securing said mesh structure to said shank.

2. A hip joint implant as set forth in claim 1 wherein said wire mesh structure is of multi-layer construction.

3. A hip joint implant as set forth in claim 1 wherein siad means includes a plurality of weld seams along at least a peripheral edge of said wire mesh structure.

4. A hip joint implant as set forth in claim 1 wherein said blade-like poriton is recessed in said proximal medial region and receives said wire mesh structure therein in flush relation.