Dental implant

• US 5,399,090 A
• Filed: 06/30/1994
• Issued: 03/21/1995
• Est. Priority Date: 06/30/1994
• Status: Expired due to Term

• Current Assignee: Soadco. S.L.
• Original Assignee: Regent USA (Citigroup Incorporated)
• Inventors: Padros-Fradera, Alefandro
• Primary Examiner(s): WEHNER, CARY ELLEN
• Application Number:
  US08/268,642
• Time in Patent Office: 264 Days
• Field of Search: 433/173, 433/174, 433/175, 433/176
• US Class Current: 433/173
• CPC Class Codes: A61C 8/005 Connecting devices for joining an upper structure with an implant member, e.g. spacers
• CPC Class Codes: A61C 8/0074 with external threads

Abstract

A dental implant for fixing a dental prosthesis comprises a main body implantable in a maxilla and having a central hole formed so that a bolt can pass through the central hole for fixing a dental prosthesis, the main body also having a protuberance with a polygonal cross-section, and a pre-prosthetic collar having a central hole through which the bolt can pass and connectable with the main body, the pre-prosthetic collar having an internal thread, and the protuberance having external edges provided with notches which form a threading for engaging with the internal thread of the pre-prosthetic collar, so that the pre-prosthetic collar is fitted onto the protuberance by screwing without need for additional bolts.

Claims

1. A dental implant for fixing a dental prosthesis, comprising a main body implantable in a maxilla and having a central hole formed so that a bolt can pass through the central hole for fixing a dental prosthesis, said main body also having a protuberance with a polygonal cross-section;

and a pre-prosthetic collar having a central hole through which the bolt can pass and connectable with said main body, said pre-prosthetic collar having an internal thread, and said protuberance having external edges provided with notches which form a threading for engaging with said internal thread of said pre-prosthetic collar, so that said pre-prosthetic collar is fitted onto said protuberance by screwing without need for additional bolts.

2. A dental implant as defined in claim 1, wherein said protuberance is formed essentially as a straight prism having said polygonal cross-section.

3. A dental implant as defined in claim 1, wherein said main body has a trunco-conical section provided with an external thread for implanting in a maxilla, said protuberance extending from said trunco-conical section, said central hole of said main body extending through said protuberance and partially through said trunco-conical section.

4. A dental implant as defined in claim 1, wherein said central hole of said main body is threaded, while said central hole of said pre-prosthetic collar is not threaded, so that the bolt can pass through said central hole of said pre-prosthetic collar and is screwable into said threaded central hole of said main body.

5. A dental implant as defined in claim 1, wherein said central hole of said pre-prosthetic collar has a first portion with a diameter dimensioned so that the bolt can pass through said first portion with a clearance, and a second portion provided with said internal thread engageable with said threading of said protuberance, said second portion of said central hole of said pre-prosthetic collar being wider than said first portion of said central hole.

6. A dental implant as defined in claim 1, wherein said main body is composed of titanium.