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US4722688A Expired / Lapsed US ⏱️ 0.0 years remaining

Dental implants and accessories therefor

Assignee: Individual
•
Filing: 1986-03-19
•
Granted: 1988-02-02
•
Expires: 2006-03-19
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Abstract

Abstract An implant of one-piece construction is made of a carbon carbon composite material having a texture of carbon fibers and a fiber interconnecting matrix also of carbon. The implant comprises a root portion and a coronal portion which may be frustoconical or cylindrical. A peripheral groove may be formed between the root and coronal portions permitting gum growth to grip the implant. The implant may be finned. A plurality of implants may be provided on a perforate blade. The axis of the coronal portion may be inclined relative to the axis of the root portion. In an embodiment, the root portion is gable roof-shaped and may be joined by a rod to form twin implants. Accessories adapted to the implant for mounting the dental crown are also shwon as well as a surgical instrument for cutting the gums before drilling the socket in the jawbone.

Inventors

  • 👤 Philippe Lonca

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 15:17
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0018; A61C8/0019; A61C3/00; A61C3/02; A61C8/0012; A61C8/0031; A61C8/0048; A61C8/0075; A61C8/0089; A61C8/0078

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 96 words
A dental implant comprising a one-piece structure of carbon carbon composite material having a structure of carbon fibers and a fiber interconnecting matrix also of carbon, said one-piece structure comprising a cylindrical root portion having a cylindrical surface adapted to extend into a cylindrical recess in a jawbone and to come into direct contact with bone tissue and a frustoconical coronal portion adapted to project from a gum and receive a dental crown, said root portion having at least one flat formed in said cylindrical surface and extending parallel to the axis of said root portion.
Claim 2
Dependent Claim 96 words
A dental implant comprising a one-piece structure of carbon carbon composite material having a structure of carbon fibers and a fiber interconnecting matrix also of carbon, said one-piece structure comprising a cylindrical root portion having a cylindrical surface adapted to extend into a cylindrical recess in a jawbone and to come into direct contact with bone tissue and a frustoconical coronal portion adapted to project from a gum and receive a dental crown, said root portion having at least one flat formed in said cylindrical surface and extending parallel to the axis of said root portion.
Claim 3
Dependent Claim 26 words
The implant of claim 1, wherein said at least one flat is of constant width and extends along the entire length of said cylindrical root portion.
Claim 4
Dependent Claim 33 words
The implant of claim 2, wherein the lower end of said cylindrical root portion is slightly frustoconical with blunted edges, the angle of said frustoconical lower end ranging between about 20° and 120°.
Claim 5
Dependent Claim 33 words
The implant of claim 2, wherein said cylindrical root portion comprises a lug having a thread segment adapted to be keyed into a suitably configured wall in a cylindrical socket in the jawbone.
Claim 6
Dependent Claim 39 words
The implant of claim 1, wherein a circular peripheral groove of rounded cross section is provided in said one-piece structure between said root portion and said coronal portion, said root and coronal portions both being substantially bodies of revolution.
Claim 7
Dependent Claim 22 words
The implant of claim 5, wherein the axis of said coronal portion is inclined relative to the axis of said root portion.

References Cited (Backward Citations)

US3557454A Cited
US3717932A Cited
US4195409A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-02-01 1991-08-03 1992-02-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-02-01 1995-08-03 1996-02-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-02-01 1999-08-03 2000-02-02 $7700.00 Window Closed / Lapsed

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