FAGD Exam – Orthodontics questions with answers.

FAGD Exam – Orthodontics questions |\ |\ |\ |\ |\




with answers |\




Maxillary fixed bilateral space maintainer is also known
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as? - CORRECT ANSWERS ✔✔Nance appliance
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If both primary canines were present, what appliance
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could be used in place of a Nance appliance (maxillary
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fixed bilateral space maintainer)? - CORRECT ANSWERS
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✔✔Band and loop (bilateral) |\ |\ |\




What situation is a Nance appliance appropriate for? -
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CORRECT ANSWERS ✔✔Premature bilateral loss of |\ |\ |\ |\ |\ |\



maxillary primary teeth |\ |\




What are the 4 properties of ideal wire material? -
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CORRECT ANSWERS ✔✔1. High strength |\ |\ |\ |\




2. Low stiffness
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3. High working range
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4. High formability
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Stainless steel wire characteristics - CORRECT ANSWERS
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✔✔- good mechanical properties
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,- excellent corrosion resistance
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- low cost
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- highest modulus of elasticity
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- lowest spring back
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- 18% chromium, 8% nickel
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Stainless steel vs nickel titanium orthodontic wires -
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CORRECT ANSWERS ✔✔Stainless steel has a high |\ |\ |\ |\ |\ |\ |\



modulus of elasticity and a lower resilience
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NiTi orthodontic wire characteristics - CORRECT ANSWERS
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✔✔Offer a highly desirable combination of low modulus
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of elasticity and extremely wide working range
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Benefits of the Hawley retainer? - CORRECT ANSWERS
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✔✔- palatal coverage makes it possible to incorporate a
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bite plant lingual to the upper incisors to control bite
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depth |\




-


What is the major source of anchorage in a Hawley
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appliance? - CORRECT ANSWERS ✔✔Palatal coverage |\ |\ |\ |\ |\

, Prior to direct bonding, ________ is used as an etching
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agent. Prior to placing bands, ________ is used as an
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etching agent? - CORRECT ANSWERS ✔✔35-50%
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unbuffered phosphoric acid |\ |\




Nothing


Indications for using bands instead of banded brackets? |\ |\ |\ |\ |\ |\ |\ |\



(4) - CORRECT ANSWERS ✔✔1. To provide better
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anchorage for greater tooth movement |\ |\ |\ |\




2. For teeth that will need both lingual and labial
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attachment
3. Teeth with short clinical crowns
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4 Tooth surfaces that are incompatible with successful
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bonding


What is the "anchorage value" of any tooth? - CORRECT
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ANSWERS ✔✔It is roughly equivalent to its root surface|\ |\ |\ |\ |\ |\ |\ |\ |\



area (the same as the periodontal ligament area)
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What are the 5 anchorage types? - CORRECT ANSWERS
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✔✔1. Reciprocal tooth movement: is produced when two
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teeth or resistance units of equal size are moved against
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each other and move the same amount toward or away
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from each other. |\ |\