The effects of plaque: a bio-electrical phenomena
An electrical potential applied to bone will cause demineralization at the positive electrode and calcification at the electrode.
Nature 104: 652-54, 1964
Electrical currents applied to tooth structure act in the same way, producing decalcification at the positive electrode and calcification at the negative electrode.
Arch Oral Biology 11: 931-36.1966
Dental plaque can act as a fuel cell, capable of generating an electrical potential.
Parker, RB and Snyder, LM the electrical potential of dental plaque
Life Science 3: 1276-79 1964
Voltages produced by bacterial mats vary depending on temperature and the strains of organisms. Mats of mixed cultures may produce up to 160 millivolts. A dramatic increase occurred when the mat was flushed over by sugar of up to 450 millivolts.
Arch Oral Biol 122: 131-140, 1967
Electrical potential of the plaque may play a role in the decalcification of tooth structure associated with the caries process.
J D Res... 48: 795-98, 1969 JD Res 52:199-205,. 1973
Calcified tissues of bone an teeth maintain resting potential. Cell activity is mainly responsible for bio-electrical potential in bone. When metabolism ceases, the potential also ceases. Calcif Tissue re...13; 53-62, 1963
Enamel surface has an electrical potential of 0-20 millivolts in relationship to the negative internal potential. The potential difference occurs due to the difference in ionic strength of the saliva on the external surface and the blood internally as well as tooth metabolism.
More Bio-electrical Facts:
Average resting potential of the external surface is 5-10 millivolts positive. Indirect evidence seems to indicate that the resting potential of the enamel surface is maintained by internal tooth metabolism.
With the application of acid to the enamel of a vital tooth, the surface potential of the tooth becomes a negtive 45-50 millivolts. However, it does not remain at that level but returns very rapidly to it's resting potential. this change in potential difference alters tooth metabolism and ion movement and is dictated by the tooth's internal activity.
JD Res 48: 789-94, 1969
Calcium and potassium are found in measurable amounts in the chemicl composition of human enamel fluid. Calcium in the fluid appears to be mobile, exchangeable and could be influecnced by an electrical field. Adv. FI Res...and Dent Caries Prev 4: 163-68, 1965
If tooth metabolism fails, it loses it's ability to restore resting potential. Calcium tends to then move from the deeper portions of the tooth to the negatively charged plaue on the surface. the subsurface enamel demineralizes and the enamel surface mineralizes.
JADA 83: 1078-80, 1971