Artificial hip joint socket

• US 4,531,243 A
• Filed: 09/20/1983
• Issued: 07/30/1985
• Est. Priority Date: 10/05/1982
• Status: Expired due to Term

• Current Assignee: Sulzer Brothers, Ltd (Sulzer AG)
• Original Assignee: Sulzer Brothers, Ltd (Sulzer AG)
• Inventors: Frey, Otto, Weber, Bernhard G.
• Primary Examiner(s): Apley, Richard J.
• Assistant Examiner(s): ISABELLA, DAVID J
• Application Number:
  US06/533,960
• Time in Patent Office: 679 Days
• Field of Search: 3/1.9, 3/1.91, 3/1.912, 3/1.911, 3/1.913, 128/92 C, 128/92 D, 128/92 CA, 128/92 B, 128/92 E
• US Class Current: 128/898
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2002/3008 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2002/30785 parallel
• CPC Class Codes: A61F 2002/3079 Stepped or enlarged apertures, e.g. having discrete diameter changes
• CPC Class Codes: A61F 2002/3241 having a ring, e.g. for locking the femoral head into the acetabular cup
• CPC Class Codes: A61F 2002/3401 with radial apertures, e.g. radial bores for receiving fixation screws
• CPC Class Codes: A61F 2002/3406 Oblong apertures
• CPC Class Codes: A61F 2002/4631 the prosthesis being specially adapted for being cemented
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

The hip joint socket is provided with a peripheral edge or flange in which a plurality of bores are formed. Each bore narrows conically from one side of the peripheral edge towards the free surface of the socket to provide outflow paths for excess bone cement which is displaced during implanting of the socket in a pelvis. The construction in the bores also permits the excess cement to harden into a rivet-like plug to increase the securement of the hip joint socket in the cement bed.

Claims

1. A method of implanting an artificial hip joint socket in a prepared pelvis, said method comprising the steps of

forming a hardenable bone cement bed in the prepared pelvis,

implanting a hip joint socket having an outwardly directed peripheral edge with a plurality of constricted bores each of which bores narrows from one side of the edge in a direction towards a free surface of the edge in the bone cement bed while permitting excess bone cement from the bed to flow into and through the bores, and

removing the bone cement streaming from the bores at the free surface of the edge.

2. A method as set forth in claim 1 wherein each bore narrows to a constriction located in a plane of said edge and widens from said constriction to a free surface of said edge and the bone cement in each bore is permitted to harden in each bore to form a rivet-like union therein.