DENTAL PROSTHESIS AND MANUFACTURING METHOD THEREOF

• US 20100035209A1
• Filed: 03/14/2008
• Published: 02/11/2010
• Est. Priority Date: 03/16/2007
• Status: Active Grant

• Current Assignee: Wan Young Jang
• Original Assignee: Wan Young Jang
• Inventors: Jang, Wan Young
• Granted Patent: US 8,221,120 B2
• Time in Patent Office: Days
• US Class Current: 433/194
• CPC Class Codes: A61C 13/267 Clasp fastening
• CPC Class Codes: A61C 13/273 removably secured to residual teeth by using bolts or locks

Abstract

The present invention relates to a dental prosthesis, and more particularly, to a screw-engagement type dental prosthesis which enables non-preparation of the natural tooth because it is manufactured by division into two pieces or three pieces, which can be simply installed, and in which the occlusal pressure can be uniformly dispersed. Also, the present invention relates to a method of casting a screw-engagement type dental prosthesis by using a bolt made of carbon or ceramics. Furthermore, a keeper and a body are engaged with each other via a bolt in a state where thin and semi-conical maintaining portions formed on inner inclination surfaces of abutment teeth of both sides with a small preparation are accurately engaged with keys formed on inner inclination surfaces of the keeper and the body in correspondence to the maintaining portions.

Claims

1. A dental prosthesis for restoring a missing tooth, comprising:

a keeper disposed to wrap an abutment tooth of one side from a lingual side,

a base disposed to wrap an abutment tooth of other side from the lingual side and connected the keeper, and

a body acting as an artificial tooth and engaged with the keeper and the base by means of a screw, and disposed to wrap the abutment tooth of one side or the abutment tooth of the other side from a buccal side.

2-5. -5. (canceled)

6. A casting method for manufacturing the dental prosthesis, the method comprising:

(a) constructing a stone model by duplicating a mouth of a patient;

(b) duplicating a refractory model using the stone model;

(c) manufacturing a keeper by casting the keeper using the refractory model;

(d) manufacturing a base by casting the base corresponding to the structure of the keeper; and

(e) manufacturing a body by casting the body corresponding to the structures of the keeper and the base,

wherein the manufacturing steps of the base and the body respectively include a step of forming a screw engagement hole using a casting bolt substituting for a duplication bolt when the duplication bolt and filling material are injected to form a female screw perforating all of the keeper, the base and the body.

7-15. -15. (canceled)

16. A dental prosthesis for a molar tooth for restoring a missing tooth, comprising:

a keeper disposed to simultaneously wrap an abutment tooth of one side from a lingual side and a buccal side; and

a body disposed to wrap an abutment tooth of the other side from the lingual side and the buccal side, the body acting as an artificial tooth and engaged with the keeper by means of a screw.

17. (canceled)

18. A dental prosthesis for a front tooth for restoring a missing tooth, comprising:

a keeper disposed to simultaneously wrap an abutment tooth of one side at adjacent surfaces of a lingual side and a lip side; and

a body disposed to wrap an abutment tooth of the other side at adjacent surfaces of the lingual side and the lip side, the body acting as an artificial tooth and engaged with the keeper by means of a screw.

19-31. -31. (canceled)

32. A manufacturing method of a dental prosthesis for a false teeth assembly, comprising the steps of:

manufacturing a metal duplication bolt of the same form as a carbon bolt obtained by performing turning after compression-molding and a ceramic bolt obtained by performing sintering and turning after compression-molding;

completely forming all engagement portions, such as female screws, in sequence according to a casting method using the bolts, and forming a space for inserting an engagement bolt thereto.

33. A method of forming a female screw on a dental prosthesis, comprising the steps of:

manufacturing a carbon bolt obtained by performing turning after compression-molding and a ceramic bolt obtained by performing sintering and turning after compression-molding; and

forming female screws on the bolts according to a casting method adopting the bolts.

34. A dental prosthesis for a molar tooth for restoring a missing tooth, comprising:

a keeper disposed to simultaneously wrap an abutment tooth of one side from a lingual side and a buccal side, the keeper having a male, which is an engagement portion, formed at the center of a missing tooth portion of a keeper bottom portion; and

a body disposed to wrap an abutment tooth of the other side from the lingual side and the buccal side, the body acting as an artificial tooth and having a body female drilled inside an artificial tooth, the body female being engaged with the keeper male of the keeper through friction resistance.

35. (canceled)

36. A dental prosthesis for a front tooth for restoring a missing tooth, comprising:

a keeper disposed to simultaneously wrap an abutment tooth of one side at adjacent surfaces of a lingual side and a lip side, the keeper having a male, which is an engagement portion, formed at the center of a missing tooth portion of a keeper bottom portion; and

a body disposed to wrap an abutment tooth of the other side at adjacent surfaces of the lingual side and the lip side, the body acting as an artificial tooth and having a body female drilled inside an artificial tooth, the body female being engaged with the keeper male of the keeper through friction resistance.

37-48. -48. (canceled)