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Exam (elaborations)

"Mock" Written EFDA Board Questions and Answers 2024/2025

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  • Course
  • EFDA
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  • EFDA

Why is a thin layer of calcium hydroxide considered therapeutic when placed in a deep prep?  Stimulates a thickening of dentin At which line angles are the retention grooves in a class II amalgam located?  Linguoaxial and buccoaxial What is dentin primarily composed of?  Dentinal tu...

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  • October 11, 2024
  • 13
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • EFDA
  • EFDA
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2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!


"Mock" Written EFDA Board Questions
and Answers 2024/2025
Why is a thin layer of calcium hydroxide considered therapeutic when placed in a deep

prep?


 Stimulates a thickening of dentin


At which line angles are the retention grooves in a class II amalgam located?

 Linguoaxial and buccoaxial


What is dentin primarily composed of?

 Dentinal tubules with protoplasmic extensions


What is enamel composed of?


 95% organic matter


At which portion of the tooth is enamel thicker?

 Incisal/occlusal


Which is darker in color, enamel or dentin?

 Dentin


ZOE placed in a deep DO amalgam to replace axial and pulpal walls should have what type

of base shape?


 Rounded/beveled axis-pulpal line angle



1|Page| GradeA+ | 2 0 0 2 5

, 2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!

Which material is NOT compatible with composite?

 Zinc oxide eugenol cement


A lingual pit on tooth #7 is what type of restoration?

 Class I


Where would you place a base?


 On dentin surfaces


Which metal adds strength and decreases expansion of amalgam?

 Copper


What is the order of placement in a very deep prep for amalgam that has a near-pupal

exposure and loss of axial wall contour?

 Calcium hydroxide, cavity varnish, zinc phosphate cement


What component results in decreased expansion of amalgam?


 High copper content


What is galvanization?

 Occurs when dissimilar metals touch inside the mouth and produce an electric current
that causes pain


Which material has poly acrylic acid as a component of its liquid?

 Glass ionomer cement



1|Page| GradeA+ | 2 0 0 2 5

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