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1 School Dental Service, Middlesex County Council, Middlesex, England
Initial readings of salivary oxidation-reduction potentials are unreliable when used to type saliva.
They are affected by the previous treatment of the electrode and to a lesser extent by the type of electrode used.
Drifting potentials are the result of some unknown function of the electrode and are not primarily due to an actual salivary oxidation-reduction potential drift during the experiment.
Relative stability is obtained after an average of 60 minutes in a sample of saliva constantly agitated.
This final reading, as opposed to the initial one, appears to be more reliable as a basis for any investigation which attempts to relate oxidation-reduction potentials of saliva to clinical conditions.
Submitted on July 28, 1958
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