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US4184252A Expired / Lapsed US ⏱️ 0.0 years remaining

Overdenture and method for securing same

Assignee: Individual
•
Filing: 1977-11-18
•
Granted: 1980-01-22
•
Expires: 1997-11-18
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Abstract

Abstract An improved overdenture structure and a method for securing it to the residual ridge of a patient. The nerve of at least one healthy tooth is removed and the root canal is filled with dental paste as in a root canal treatment. The crown of the tooth is removed near the gum line and a ferromagnetic bar is embedded in the filled root. Magnetic material is embedded in the overdenture in such position as to be aligned with the ferromagnetic bar at closure points. The dental material surrounding the ferromagnetic bar and the magnetic material embedded in the overdenture are shaped so as to provide contoured mating surfaces with one another. In an alternative embodiment, a root canal treatment is performed on two healthy teeth and bars are embedded in the roots of those teeth. A ferromagnetic rod is connected between the ends of the two bars. Magnetic material is embedded in the overdenture in position to be aligned with the entire length of the ferromagnetic rod. The dental material surrounding the ferromagnetic bars and the magnetic material embedded in the overdenture are shaped so as to provide contoured mating surfaces with one another.

Inventors

  • 👤 Arthur J. Krol
  • 👤 Tomas C. Pablos

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 20:26
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/225; A61C13/235

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 89 words
An improved overdenture wherein the improvement comprises a first material secured to the overdenture at locations where said overdenture is adapted to be in direct physical contact with a second surface contoured material partially embedded in and extending between at least two natural teeth, wherein said first material and said second material are magnetically attractive to one another, the outer surface of said first material being contoured to mate with that portion of the contoured surface of the second material that extends between said at least two natural teeth.
Claim 2
Dependent Claim 89 words
An improved overdenture wherein the improvement comprises a first material secured to the overdenture at locations where said overdenture is adapted to be in direct physical contact with a second surface contoured material partially embedded in and extending between at least two natural teeth, wherein said first material and said second material are magnetically attractive to one another, the outer surface of said first material being contoured to mate with that portion of the contoured surface of the second material that extends between said at least two natural teeth.
Claim 3
Dependent Claim 14 words
An improved overdenture as recited in claim 1, wherein said first material is magnetic.
Claim 4
Dependent Claim 15 words
An improved overdenture as recited in claim 1, wherein said first material is samarium cobalt.
Claim 5
Dependent Claim 15 words
An improved overdenture as recited in claim 1, wherein said first material is praseodymium cobalt.
Claim 6
Independent Claim 99 words
A method of securing an overdenture at least two natural teeth each having a root canal with a nerve therein which comprises the steps of: (a) removing said nerve from each of said root canals, (b) filling said root canals with dental fill material, (c) removing the crown of each of said teeth, (d) embedding a ferromagnetic bar in each of said root canals, (e) attaching a ferromagnetic rod to the ends of said ferromagnetic bars, and (f) embedding magnetic material in said overdenture in position so as to be aligned and in direct contact with said ferromagnetic rod.
Claim 7
Independent Claim 99 words
A method of securing an overdenture at least two natural teeth each having a root canal with a nerve therein which comprises the steps of: (a) removing said nerve from each of said root canals, (b) filling said root canals with dental fill material, (c) removing the crown of each of said teeth, (d) embedding a ferromagnetic bar in each of said root canals, (e) attaching a ferromagnetic rod to the ends of said ferromagnetic bars, and (f) embedding magnetic material in said overdenture in position so as to be aligned and in direct contact with said ferromagnetic rod.
Claim 8
Dependent Claim 24 words
A method as recited in claim 5, further comprising the step of providing the exposed end of said magnetic material with a chrome plating.
Claim 9
Dependent Claim 30 words
A method as recited in claim 5, wherein the step of attaching comprises the step of soldering the ends of said ferromagnetic rod to the ends of said ferromagnetic bars.
Claim 10
Dependent Claim 24 words
A method as recited in claim 5, further comprising the step of providing the exposed surfaces of said magnetic material with a chrome plating.

References Cited (Backward Citations)

US2149048A Cited
US3085334A Cited
US3646676A Cited
FR2308348A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1983-01-21 1983-07-23 1984-01-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1987-01-21 1987-07-23 1988-01-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1991-01-21 1991-07-23 1992-01-22 $7700.00 Window Closed / Lapsed

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