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The concept of the Specific Plaque Hypothesis (SPH) has been advanced by Dr.
Walter Loesche in 1976. 8 The significant statement is as follows:
“only certain plaques cause infections, because of the presence of a pathogen(s) and/or a relative increase in the levels of certain indigenous plaque organisms. The SPH requires that a diagnosis of infection be made so that prompt mechanical and/or chemical therapy can be initiated in order to restore the normal plaque flora.” This hypothesis is currently accepted as fact and is used to guide the diagnosis and therapy by many clinicians.
The requirement of bacteriologic diagnosis is one significant difference.
When the clinician utilizes microbiologic testing, a measure of predictability
of results is attained which was never before possible.