![]() According to this theory, sensitivity is the result of the rapid movement of the fluid contained in the interior of the dentinal tubules. 1 2īrännström’s hydrodynamic theory is the most widely accepted for explaining mechanisms that involve the triggering of pain sensations in DH. The proper diagnosis is essential to the establishment of adequate treatment. The exposure of the dentinal tubules causes a reduction in the pain threshold, leading to a response from nerves in the pulp characterised by a rapid, acute, intense pain associated with the mechanoreceptor hydrodynamic mechanism. Dentin hypersensitivity (DH) is defined as high sensitivity of vital dentin exposed to thermal, chemical or tactile stimuli.
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