Home' Australian Pharmacist : Australian Pharmacist August 2015 Contents Australian Pharmacist August 2015 I ©Pharmaceutical Society of Australia Ltd.
1. Which of the following statements
regarding DH is INCORRECT?
a) DH is experienced as a short, sharp pain
due to exposed dentine tissue.
b) DH usually peaks in the third and fourth
decades of life.
c) DH only affects the canines and
premolars of the upper set of teeth.
d) DH is a common dental problem.
2. Which of the following could be a
likely cause of DH?
a) Brushing teeth with a hard toothbrush.
b) Drinking acidic soft drinks often without
rinsing mouth out.
c) Receding gums.
d) All of the above.
3. Which of the following statements is
a) The hydrodynamic theory of DH
suggests that a stimulus can cause
movement of the fluid in exposed
b) The hydrodynamic theory of DH
suggests that a stimuli stops movement
in the dentinal fluid, which triggers
c) Demineralisation causes leaching
of minerals from the enamel and
cementum, which helps to seal the
d) Cementum and dentine have
a lattice-like structure made of
amorphous calcium phosphosilicate.
4. Which of the following statements
regarding DH is INCORRECT?
a) Toothpastes containing NovaMin and
Pro-Argin have been shown to help
b) A self-care tip to avoid eroding dentine
is to brush teeth soon after consuming
c) Toothpastes containing potassium
nitrate may increase extracellular
potassium levels causing cell
d) The two main ways in which
desensitising toothpastes work are
by blocking the dentine tubules or
• Dentine hypersensitivity (DH) is a common dental problem.
• DH is caused by exposure of the dentine tissue in the tooth by attrition,
abrasion or erosion.
• The most commonly accepted mechanism for DH is the hydrodynamic
theory. This suggests that fluid movement in the tiny dentine tubules triggers
pressure-sensitive nerves in the tooth’s pulp, sending pain signals to the brain.
• Common stimuli or triggers of pain include cold, hot, sweet, salty or acidic foods
and drinks, cold air, vigorous brushing of teeth and some dental procedures such as
tooth scaling and bleaching.
• Several in-home desensitising toothpastes are available to purchase from the
pharmacy. When used twice daily these can help reduce DH. These should be used
in conjunction with good oral hygiene measures and some self-care tips on how to
avoid painful triggers.
• Several active ingredients are used in DH toothpastes. There is no gold standard
treatment for in-home use of DH products.
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Answer online at www.psa.org.au
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