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:
May. 28, 1985
Filed:
Mar. 07, 1983
Jonathan Black, King of Prussia, PA (US);
Thomas J Baranowski, Jr, Philadelphia, PA (US);
Trustees of the University of Pennsylvania, Philadelphia, PA (US);
Abstract
Disclosed is a method and apparatus for maintaining the potential between a cathode and a reference electrode substantially constant during electrically-induced osteogenesis. Two separate embodiments of electronic circuits are provided which will generate a D.C. current to flow between a cathode and anode while maintaining the potential between the cathode and the reference electrode substantially constant within the range of 0.1 to 1.26 Volts and preferably within the range of 1.0 to 1.26 Volts. Improvement in the amount of new bone grown over prior art bone growth stimulators is on the order of 200 to 300 percent. The electronic circuits provide the substantially constant cathodic potential over a wide range of load impedances between the anode and cathode. The disclosure is applicable not only to improving osteogenesis in bone fracture sites, but also to applications in which it is desirable to provide bone accretion for any reason.