The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 1979
Filed:
Oct. 13, 1977
Tatsuya Ishikawa, Kodaira, JP;
Sumio Kuriyama, Tokyo, JP;
Yoshinori Takaesu, Morioka, JP;
Haruhisa Furuishi, Suita, JP;
Yoshio Okuzaki, Hirakata, JP;
Seiichi Motomura, Kawasaki, JP;
Yoshinori Musha, Chofu, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
The Lion Dentifrice Co., Ltd., Tokyo, JP;
Abstract
In order to electrically apply fluoride by means of iontophoresis on a tooth an intermittent direct current is made to flow through the tooth. More particularly, the intermittent direct current has a waveform whose leading edge immediately rises to a peak and which decreases exponentially in time. As a result electrochemical polarization may be avoided and the ratio of the current conduction time to the repetition period may be increased so that the uptake efficiency of fluoride by the tooth may be considerably improved in a smooth manner without the need of impressing an excessive current on the tooth. Therefore adverse effects on nerve systems may be avoided, a patient under treatment feels no pain and no unpleasant stimulus, and the tooth's substance may be so improved as to be free from dental caries or decay.