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Oral Potential Meter
The Oral Potential Meter II aids the dental professional in detecting potential caries. It performs measurements of certain electrochemical properties of various metallic restorations. For more info on the OPM please go to: www.MetalPoison.com
Mercury fillings that have been placed over a period of time, develop a different content, as does other kinds of dental metallic restorative material. When both are placed in the same oral cavity of the same individual, galvanic electricty generated between the two can be measured exactly. 
Various biological tests reveal how electricity exerts its influence on hard tissue and pulp of the teeth.
Laboratory examination of the tests revealed the following results:
1. Using different electrobaths made of mercurous chloride electrodes, the natural electric potential of amalgam and various kinds of alloys for dental usecan be measured. The mercury content changes the potential of different amalgams. The increase of mercury content, produced an unstable condition that could be demonstrated. In fillings of small mercury content, the current veered to the (+) over a period of time (48 hours) the condition stabilized.
2. Various metal for dental use, produced an unstable condition in the (-) side is placed.
3. Two teeth, under laboratory conditions, with different amounts of mercury in the fillings in contact, in an electro- conducting container exhibited decalcification in the one with the highest mercury content.
4. High to medium gold alloy inlay and a tooth containing an amalgam placed into an electro test container, exhibited a stronger current flow than in example three. Again a remarkable decalcification took place in the hard tissues of the tooth with the most mercury.
5. Other experiments on animals produced the same results.
6. Pulp tissue from the galvanic current produced pathological changes indicating that the battery effect of amalgams can affect the health of the tooth.
7. The forgoing information demontstrates the changes in the hard and soft tissue the galvanic current can produce on the teeth that contain amalgams.
The measurement of natural electric potential inside the mouth caused by dental amalgam filling and its influence upon the tissue of the tooth by Akira Shimomura J. Osaka Gynecological Society Vol. 21
(No. 5) Nov 25 1958 ( The fist Dept. of Anatomy, Osaka dental college Chief of the Dept., Senior Prof. Mikio Shirasu.)
Transferred from amalgams per second, Dr. James Masi Ph.D.
An inference regarding the ion exchange, anodic and cathodic reg
ions, and possible excessive galvanic effects can be made simply as follows:
Polarity indicates cathode vs. anode voltage gives the magnitude (driving potential) for the electroc-chemical reaction: and current gives the number of ions per second transferred eg. Hg vs. Au, is positive, approximately 0.4 volts, with respect to Hg, at 10 microamperes (typical of measured values using this method). I is the current ampers (Coulombs/second) q is the electronic charge (coulombs), n is the valence of the of the species (eg. Hg), then N= Inq (eq.3) or N=10X10 to the 5th / (2x 1.6 x 10 to the - 19th) = 3 12 x 10 to the 13th ions/sec., assuming Hg is available in an electrolytic environment. Further calculations lead to removal of approximately 10 ng/sec. for a constant current as measured.
Measurements made on the saliva of thirty subjects w
ith mixed metals in the mouth (eg. Combinations of one or more pairs of orthodontic stainless steel, amalgams, gold inlays, titanium post, base metal post, graphite composite posts, etc.) were made by A. A. S. , stripping utilized the infection atomized species into a flame with the attendant absorption (from an Hg discharge lamp, for example) or emission from th flame of certain wavelengths characteristic of the metal to be detected. The basis of this work utilized both FAAS and GFAAS with detection limits of 0.3 to 1 micro gram/ L, dependent on whether or not gold amalgamation concentration techniques (16) were used. A second method involves a slightly less expensive gold film techniques call differential pulse Anodic Stripping Voltammetry (17). with detection capabilities down to 1ppb (1pg/L).
A third, less expensive method for detection in vivo is a potential / current/energy meter, which measures the potential, current, and energy between two metallic restorations. Picture shows radio active mercury ions released into the tissue of a monkey from amalgams placed in the occlusals surfaces of the molar teeth.
For more documented references on subject
Read more about the Oral Potential Meter at www.MetalPoison.com
Dr. D. L. Cook • 10971 Clinic Road • Suring, Wisconsin 54174 USA
Tel: (920) 842-2083 • Fax: (920) 842-4203