Dentinal Hypersensitivity Question And Answers

Dentinal Hypersensitivity Long Essays

Question 1. Management of dentin hypersensitivity


Management of dentin hypersensitivity:

1. Home care with dentrifices

  • Strontium chloride
  • Potassium nitrate
  • Fluoride

2. In-office treatment

  • Varnishes
  • Corticosteroids
  • Treatment of dentinal tubules
  • Burnishing of dentin
  • Silver nitrate
  • Zinc Chloride
  • Iontophoresis
  • Fluoride compounds
  • Potassium oxalate
  • Dentin bonding agents
  • Restorative resins
  • Laser

3. Patient education

  • Dietary counseling
  • Tooth brushing technique
  • Plaque control

Dentinal Hypersensitivity Short Essays

Question 1. Theories of Hypersensitivity.


Theories of Hypersensitivity:

1. Neural Theory

  • States that hypersensitivity occurs due to the activation of nerve ending lying within the dentinal tubules
  • Rejected because
    • Dentinal nerves do not extend beyond the inner dentin
    • A newly erupted tooth does not poses such nerve endings yet it is sensitive
    • Application of local anesthesia to exposed dentin does not eliminate dentin sensitivity

2. Odontoblastic Transduction theory

  • Assume that the odontoblast extend to the periphery
  • Stimuli excite the odontoblastic process, this comes into close apposition to nerve endings and transmits excitation to it,
  • Rejected because
    • Absence of synaptic relationship between odontoblast and pulpal nerves
    • There is no neurotransmitter vesicles in the odontoblastic process
    • The membrane potential of odontoblast is too low to permit transduction
    • The odontoblastic process is restricted to the inner third of dentinal tubules

3. Hydrodynamic theory

  • Proposes that a stimulus causes displacement of the fluid that exists in the dentinal tubules
  • This activates the nerve endings present in the dentin or pulp

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  • Accepted because
    • When dentin is exposed, fluid can be seen
    • Profuse branching of tubules at DEJ is present to induce sensitivity

Dentinal Hypersensitivity Theories of dentin hypersensitivity

  1. Neural theory: Stimulus applied to dentin causes direct excitation of the nerve fibers
  2. Odontoblastic transduction theory: Stimulus is transmitted along the odontoblast and passes to the sensory nerve, endings through synapse
  3. Hydrodynamic theory: Stimulus causes displacement of fluid present in dentinal tubules which further excite nerve fibers

Dentinal Hypersensitivity Viva Voce

  1. The hydrodynamic theory is an accepted theory of dentinal hypersensitivity.

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