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Publication numberUS2834344 A
Publication typeGrant
Publication dateMay 13, 1958
Filing dateJul 20, 1955
Priority dateJul 22, 1954
Publication numberUS 2834344 A, US 2834344A, US-A-2834344, US2834344 A, US2834344A
InventorsKanai Masakuni
Original AssigneeLion Brush K K
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Device for penetrating teeth with fluoride
US 2834344 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

May 13, 195 8 MASAKUNI KANAL 2,834,344


United Sitates Patent 6 DEVICE FOR PENETRATING TEETH WITH FLUGRIDE Masaituni Kauai, llchikawa, Japan, assignor of one-half to Lion Brush K. K., Tokyo, Japan Application July 20, 1955, Serial No. 523,333

Claims priority, application Japan July 22, 1954 1 Claim. (Cl. 128-1721) The present invention relates to a device for penetrating teeth with fluoride for prevention of teeth from being decayed.

it has been already known to apply onto the surface of the teeth a powder or a tooth powder containing a fluoride or a solution thereof in order to prevent the teeth from being decayed. This is possible due to the fact that the fluoride penetrates the porous tooth materials, i. e., enamel and dentine materials and thereafter passes into the internal dental pulp structure, where the fluoride suppresses breeding of lactic ferments generated in the pulp structure. When a medicine is applied to the surface of a tooth, however, there is observed a diffusion of ions, such that positive ions diffuse from the surface of the tooth toward the pulp structure, while negative ions diffuse, on the contrary, from the pulp structure toward the surface because the pH of the dental pulp blood is observed to be at about 7.8, while that of the pulp structure is about 7.3 and that of the saliva is about 6.8. Therefore, when a conventional fluoride medicine is applied onto the surface of a tooth, negative ions of the fluorine can not penetrate into the interior of the tooth but diffuse in the saliva which is a weak acid and flow out of the mouth uselessly.

One object of the present invention is, therefore, to remove the above mentioned disadvantage by obtaining, under utilization of the ionization phenomenon of an electrolyte solution, a device which enables negative ions of fluorine in the fluoride solution when applied to the surface of a tooth or teeth to penetrate positively into the dental pulp interior.

Another object of the invention is to obtain a simple, compact and cheap device of the kind mentioned above.

The accompanying drawing shows two embodiments of the device according to this invention, wherein Fig. 1 shows an elevation of one embodiment,

Fig. 2 is a cross-sectional view of the same,

Fig. 3 is an electric connection diagram of the same and Fig. 4 is a longitudinal sectional view of another em bodiment.

Referring now to Fig. l, numeral 3 denotes the handle of a tooth brush into which a lead wire 4 is inserted, one end of which is connected to a metal plate 2 touching the roots of planted natural or artificial bristles 1, while the other end of which is connected to one pole of a direct current source, i. e. a battery 5 (Fig. 3), whose positive pole is connected to a conductor plate 7 through a lead wire 6.

Now, when one applies to his teeth a fluoride attached onto the brush bristles while touching the conductor plate 7 with a suitable part of his body, the fluoride mixes with his saliva, while the electric current flows from the battery 2,834,344 Patented May 13, 1958 5 through the conductor plate 7, his body, the dental pulp structures, the fluoride solution on the surfaces of his teeth, the metal plate 2, the lead wire 4 and back to the battery. Consequently, the negative irons of fluoride in the fluoride solution advance by ionization in a direction thus opposite to the current direction, penetrating into the tooth structure, in order to diffuse and settle in said tooth structures. Thus, when lactic ferments are generated in the pulp structures, breeding of these ferments is suppressed strongly, with the result that the decaying of teeth can be prevented effectively.

A simple and compact device of the present invention is shown in Fig. 4, in which the root portion of the handle 3 is screwed into a tube 8 of an electrically insulating material, which is covered tightly with a metal cap tube 9. The tube 8 contains therein a small dry battery 10, the positive pole of which touches the inside bottom of the metal tube 9, while the negative pole is connected elastically to the exposed terminal 4' of a lead wire 4 embedded in the handle 3. The other end of the lead wire 4, as in the brush shown in Fig. 1, is connected to the metal terminal 2 touching the roots of the planted bristles. Thus, when one grips the metal tube 9 of this tooth brush and applies to his teeth a fluoride attached to the brush bristles, a phenomenon similar to that stated above with regard to Fig. 3 occurs to prevent the teeth from being decayed.

It will thus be seen that the present invention provides a tooth treating process which includes the steps of applying fluoride to the teeth of a human being and completing an electrical circuit through the fluoride and the body of the human being.

From the foregoing it will be seen that many modifications of the specific disclosed form of the invention may be resorted to, and it is to be understood that the scope of the invention is to be ascertained solely by the appended claim.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent, is:

A tooth brush comprising an elongated bristle carrying and handle portion made of electrically non-conductive material, said handle portion having an elongated hollow free end located distant from said bristle carrying portion thereof, an electrically conductive plate carried by said bristle carrying portion, a plurality of bristles carried by said bristle carrying portion and engaging said plate so that an electrically conductive liquid carried by the bristle will communicate electrically with said plate, an electrical lead extending from said plate through said handle portion to said hollow end thereof, a battery in said hollow end of said handle portion having one pole connected electrically with said lead, and an electrically conductive member covering said hollow end of said handle portion, adapted to be engaged by the hand of the user, closing said hollow end of said handle portion and electrically connected with the other pole of said battery.

References (Iited in the file of this patent UNITED STATES PATENTS 305,321 McMullin Sept. 16, 1884 407,115 Pratt July 16, 1889 FOREIGN PATENTS 991,367 France June 20, 1951

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US305321 *Jun 13, 1883Sep 16, 1884 Maby mcmullin
US407115 *Mar 21, 1889Jul 16, 1889 Electric brush
FR991367A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3019787 *Oct 5, 1960Feb 6, 1962Simmons Joe JApparatus for electrolytic dental desensitization
US3122137 *Oct 30, 1961Feb 25, 1964Gustav ErlangerDevice for facilitating iontophoresis treatment of eyes
US3234942 *Sep 3, 1963Feb 15, 1966Simor George GTray arrangement for topical application of medication to the teeth
US3292620 *Jul 30, 1963Dec 20, 1966Instro Dynamics CorpElectric desensitizer
US3412731 *Mar 29, 1965Nov 26, 1968Luther W. ReynoldsElectrophoretic toothbrush
US3478741 *Mar 30, 1967Nov 18, 1969Ion Co TheToothbrush for producing electrical potentials
US3502076 *Aug 12, 1966Mar 24, 1970Bertolini AdrianoElectrode for treatment of teeth
US3520297 *Jan 31, 1967Jul 14, 1970Chemway CorpIontophoretic toothbrush
US3645260 *Jul 17, 1970Feb 29, 1972Health Systems IncDental desensitizer
US3716054 *Aug 11, 1970Feb 13, 1973Porter WApparatus for applying medication to teeth and body tissue
US4526570 *Oct 25, 1982Jul 2, 1985Shiken, Ltd.Dental hygienic device
US4679273 *Oct 17, 1986Jul 14, 1987Seth OkinDental appliance for cleansing the gingival one third areas of the teeth as well as the sulcular and the embrasure regions thereof
US4691718 *Mar 31, 1986Sep 8, 1987Kabushiki Kaisha SangiToothbrush
US4726806 *Jul 24, 1986Feb 23, 1988Hiroshi HukubaElectric tooth-brush
US5115533 *Sep 6, 1990May 26, 1992Hiroshi HukubaToothbrush with voltage tester
US5133102 *Aug 22, 1991Jul 28, 1992Kabushiki Kaisha SangiElectronic toothbrush
US6601257Oct 13, 1999Aug 5, 2003Connoisseur Products Corp.Jewelry brush with cleaning zones
US6735470Sep 18, 2002May 11, 2004Biophoretic Therapeutic Systems, LlcElectrokinetic delivery of medicaments
US6792306Apr 8, 2002Sep 14, 2004Biophoretic Therapeutic Systems, LlcFinger-mounted electrokinetic delivery system for self-administration of medicaments and methods therefor
US6895271Aug 26, 2003May 17, 2005Biophoretic Therapeutic Systems, LlcIontophoretic drug delivery electrodes and method
US6989275Mar 22, 2002Jan 24, 2006Carnegie Mellon UniversityGenerating luminescent particles; generate reaction mixture containing biopolymers and cyanine dye, conjugate cyanine dye with biopolymer, evaluate signal from conjugate
US7008798Mar 22, 2002Mar 7, 2006Carnegie Mellon UniversityGenerating luminescent particle; obtain biopolymers, incubate with reaction mixture, recover labeled product
US7016724Dec 1, 2003Mar 21, 2006Transport Pharmaceuticals, Inc.Electrokinetic delivery system for self-administration of medicaments and methods therefor
US7069073Mar 24, 2004Jun 27, 2006Biophoretic Therapeutic Systems, LlcElectrokinetic delivery of medicaments
US7127285Feb 7, 2003Oct 24, 2006Transport Pharmaceuticals Inc.Systems and methods for electrokinetic delivery of a substance
US7261558Jul 21, 2003Aug 28, 2007Biolase Technology, Inc.Electromagnetic radiation emitting toothbrush and dentifrice system
US7467946May 18, 2006Dec 23, 2008Biolase Technology, Inc.Electromagnetic radiation emitting toothbrush and dentifrice system
US7857620Apr 30, 2007Dec 28, 2010Shy-Ming ShihToothbrush with an electric circuit
US7942667Nov 3, 2008May 17, 2011Biolase Technology, Inc.Electromagnetic radiation emitting toothbrush and dentifrice system
US8156602Oct 13, 2006Apr 17, 2012Colgate-Palmolive CompanyGenerating a chemical agent in situ
US8241035May 25, 2006Aug 14, 2012Biolase, Inc.Device having activated textured surfaces for treating oral tissue
US8328788May 11, 2011Dec 11, 2012Nitric Biotherapeutics, Inc.Methods and systems for electrokinetic delivery of a substance
US8352024Mar 13, 2006Jan 8, 2013Nitric Biotherapeutics, Inc.Electrokinetic delivery system for self-administration of medicaments and methods therefor
US8413282Jun 17, 2011Apr 9, 2013Colgate-Palmolive CompanyBio-activated oral care instrument
US8708700Mar 30, 2012Apr 29, 2014Colgate-Palmolive CompanyGenerating a chemical agent in situ
USRE37796Sep 1, 2000Jul 23, 2002Biophoretic Therapeutic Systems, LlcMethods for iontophoretic delivery of antiviral agents
USRE38341Dec 27, 1999Dec 9, 2003Biophoretic Therapeutic Systems, LlcMethod for electrokinetic delivery of medicaments
DE3114324A1 *Apr 9, 1981Aug 19, 1982Richartz SylviaToothbrush for the electrical activation of fluorine in dental care compositions
U.S. Classification604/20, 607/79, 15/167.1, 15/207.2
International ClassificationA46B15/00, A46B5/00
Cooperative ClassificationA46B2200/1066, A46B15/0022, A46B5/0095, A46B15/0002
European ClassificationA46B15/00B3C, A46B5/00C, A46B15/00B