Manufacture and installation of a dental prosthesis

• US 5,007,834 A
• Filed: 10/12/1989
• Issued: 04/16/1991
• Est. Priority Date: 10/12/1989
• Status: Expired due to Fees

• Current Assignee: Masayuki Hoshi
• Original Assignee: Masayuki Hoshi
• Inventors: Hoshi, Masayuki, Rubinstein, Sergio
• Primary Examiner(s): Wilson, John J.
• Application Number:
  US07/420,274
• Time in Patent Office: 551 Days
• Field of Search: 433/173, 433/174, 433/176, 433/213, 433/220, 433/221, 433/223
• US Class Current: 433/173
• CPC Class Codes: A61C 8/00 Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools fastening of peg-teeth in the mouth A61C13/30
• CPC Class Codes: A61C 8/005 Connecting devices for joining an upper structure with an implant member, e.g. spacers
• CPC Class Codes: A61C 8/006 with polygonal positional means, e.g. hexagonal or octagonal

Abstract

Articles used in the manufacture of a dental prosthesis, including components thereof, are disclosed. In one aspect of the invention, such articles, include a meltable, threaded shank which can be screwed into an analog of a surgically placed implant member for fabricating support structure for the prosthesis.

Claims

1. A method of making an article used in the manufacture of a dental prosthesis of the type utilizing an implant member, having a threaded bore, adapted to be placed beneath gum tissue and into underlying bone structure, comprising the following steps:

providing an analog of said implant member;

providing a temporary threaded shank, formed of meltable material;

screwing said shank into said analog; and

forming on an upper surface of said shank a temporary model of a post for said prosthesis, said model being formed of meltable material.

3. The method defined in claims 1 or 2 further including the steps of:

forming an investment around said model and at least a portion of said shank.

4. The method defined in claim 3 further including the step of:

melting away said model and said shank to form a mold within said investment for a prosthesis support that can be screwed into the bore of said implant member.

5. The method recited in claim 4 further including the step of:

filling said mold with molten material.

6. The method recited in claim 5 further including the step of:

allowing said molten material to harden into a one-piece support member of uniform metallic material.

7. The method defined in claim 6 further including the step of:

removing said support member from said investment.

8. The method defined in claim 7 further including the step of:

screwing said support member into said implant member.

9. The method defined in claim 4, wherein said shank is removed from said analog before said investment is formed therearound.

10. The method defined in claim 4, wherein said melting is accomplished by the application of heat at temperatures of between 100 and 400 degrees Fahrenheit.

11. The method defined in claim 1 or 2, wherein said analog is in dental stone.

2. A method of making an article used in the manufacture of a dental prosthesis of the type utilizing an implant member, having a threaded bore, adapted to be placed beneath gum tissue and into underlying bone structure, comprising the following steps:

providing an analog of said implant member;

filling the bore of said analog with meltable material forming a shank; and

forming on an upper surface of said shank a temporary model of a post for said prosthesis, said model being formed of meltable material.

12. A method for making a one-piece support member of uniform material used in a dental prosthesis of the type wherein the support member is screwed into the threaded bore of an implant member adapted to be placed beneath gum tissue and into underlying bone structure, comprising the following steps:

providing an analog of the implant member;

providing a temporary threaded shank;

screwing said shank into said analog;

forming on an upper surface of said shank a temporary model of a post;

forming an investment about said model and at least a portion of said shank;

removing said model and said shank from said investment to form a mold of said support member; and

filling said mold with molten material to form a one-piece support member of uniform material.

13. The method defined in claim 12, further including the step of screwing said support member into the bore of said implant member.

14. The method defined in claim 12, wherein said support member is made of metallic material.

15. The method defined in claim 12, wherein said analog is in dental stone.

16. The method defined in claim 15, wherein said melting is accomplished by the application of heat at temperatures of between about 100 and 400 degrees Fahrenheit.

17. The method defined in claim 12, wherein said model and said shank are removed from said investment by melting said model and said shank.