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ODP Revision questions with Discussed answers
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ODP Revision questions with Discussed answers
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ODP Revision questions with Discussed answersExplain 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
- E.g. Sensodyne original
The PDL allows physiological mobility up to what mm? - ✔✔0.4mm
What % hyproxyapatite is cementum? - ✔✔65%
, What does cementum protect root dentine from? - ✔✔Collagenases
released by PDL fibroblasts
What ingredients will be present if treatment option is tubule obturation? (4)
With example of products - ✔✔- Sodium fluoride (TPs/MWs/Varnish)
- Potassium oxalate liquids
- Resin bonding agents (Seal&Protect)
- Restorations (GIC)
Which toothpaste components can help in occluding tubules? (4) With examples
of products - ✔✔- Strontium Acetate
- Silica (Colgate sensitive)
- NovaMin (GSK Sensodyne repair)
- Arginine (Colgate Pro-Relief)
Intrinsic source of erosion - ✔✔Gastric acid
Extrinsic sources of erosion - ✔✔Diet
Industrial
Critical pH of enamel - ✔✔5.5
Critical pH of dentine - ✔✔6.5
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