Device for fixing a dental prothesis

• US 5,009,596 A
• Filed: 01/22/1990
• Issued: 04/23/1991
• Est. Priority Date: 04/22/1987
• Status: Expired due to Term

• Current Assignee: Astra Tech AB
• Original Assignee: Astra Meditec AB
• Inventors: Soderberg, Per O.
• Primary Examiner(s): Wilson, John J.
• Application Number:
  US07/469,798
• Time in Patent Office: 456 Days
• Field of Search: 433/173, 433/174, 433/175, 433/176
• US Class Current: 433/173
• CPC Class Codes: A61C 8/0001 Impression means for implants, e.g. impression coping

Abstract

A device for fixing a dental prosthesis is described, which device as parts thereof comprises a spacing element (1) for anchoring into the jaw-bone of a patient and a socket (7) for fixing into a prosthetic part, whereby the socket will rest on the spacing element via an outer conical supporting surface (5) provided on one of said parts, which supporting surface will bear against an inner conical supporting surface (6) provided in the other of said parts. The device is characterized in that a shoulder or flange is provided on the part having the outer conical supporting surface, which shoulder or flange has a planar surface (8) oriented radially around the periphery of the supporting surface, and that an end surface (9) is provided on the part having the inner conical supporting surface oriented radially around the periphery of said supporting surface, whereby the planar surface (8) and the end surface (9) has such an axial position on the respective part that a fine parallel gap is formed between them on bearing of the supporting surfaces against each other. The gap enables checking of the correct bearing of the conical surfaces against each other.

Claims

1. A device for fixing a dental prosthesis, which device as parts thereof comprises a spacing element adapted for anchoring into the jaw-bone of a patient and a socket adapted for fixing into a dental prosthetic part, wherein the socket rests on the spacing element via an outer conical supporting surface provided on one of said parts, which supporting surface bears against an inner conical supporting surface provided in the other of said parts, characterized in that a shoulder is provided on the part having the outer conical supporting surface, which shoulder has a planer surface oriented radially around the periphery of the supporting surface, and that an end surface is provided on the part having the inner conical supporting surface, the end surface being oriented radially around the periphery of said supporting surface, and wherein the planar surface and the end surface have such an axial position on the respective part that an externally visible fine gap of uniform and predetermined thickness is formed between them on bearing of the supporting surfaces properly against each other, whereby an improperly formed gap provides a visible indication that the parts do not properly bear against one another.

2. A device according to claim 1, characterized in that the outer conical supporting surface is arranged on the spacing element, while the inner conical supporting surface is arranged in the socket.