ODP Revision Exam Questions and
Answers 100% Pass | Rated A+
What proportions of bacteria would be found in a healthy gingival crevice? -
40% streptococci, 40% actinomyces, 20% anaerobes
What proportions of bacteria would be found in moderate gingivitis? -
25% streptococci, 25% actinomyces, 50...
Calculus consists of what percentage of inorganic compounds? - ✔✔70-
80%
Calculus is composed of mostly 4 principle types of calcium phosphate
crystals, which one is present in the highest content? - ✔✔Hydroxyapetite
The periodontal ligament in health is how wide? - ✔✔0.2-0.4mm
Define dentine hypersensitivity - ✔✔A short, sharp pain arising from
exposed dentine in response to a stimuli
(thermal/evaporative/tactile/osmotic/chemical) which cannot be ascribed to
any other dental defect or disease
Structure of dentine-pulp complex (6) - ✔✔- Dentine/pre dentine
- Microscopic layer
, - Layer of odontoblasts
- Cell free zone of connective tissue
- Cell rich zone of fibroblasts, undifferentiated cells & WBCs
- Central zone of blood vessels & nociceptive nerves
At which end are dentinal tubules wider? - ✔✔Pulpal end
Explain the 3 theories of dentine sensitivity - ✔✔1. Innervation of dentine
(nerve fibres within tubules)
2. Odontoblast transducer mechanism (would require odontoblasts to be
present entire tubule length)
3. Hydrodynamic theory (fluids in tubules disturbed by stimulus, changes
stimulate odontoblasts which leads to nerve discharge)
Describe the pulpal sensory supply (3) - ✔✔- Max & mand branch of
trigeminal nerve
- Nerve endings predominantly nociceptive (pain)
- Contains A-delta fibres & C-fibres
What ingredients will be present if treatment option is nerve desensitising?
(3) With example of product - ✔✔- Potassium nitrate
- Potassium chloride
- Potassium citrate
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