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Exam (elaborations)

NBDHE Dental Materials Questions and Answers

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  • Course
  • NBDHE
  • Institution
  • NBDHE

Adhesion Ans- The chemical attraction between unlike molecules Cohesion Ans- The chemical attraction between like molecules Coefficient of thermal expansion Ans- An index which indicated how one material reacts to temperature extremes in relation to another Compressive Strength Ans- The fo...

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  • August 2, 2024
  • 27
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • NBDHE
  • NBDHE
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NBDHE Dental Materials
Questions and Answers


Adhesion


Ans- The chemical attraction between unlike molecules




Cohesion


Ans- The chemical attraction between like molecules




Coefficient of thermal expansion


Ans- An index which indicated how one material reacts to temperature

extremes in relation to another




Compressive Strength


Ans- The force at which a material breaks under pressure

,Creep


Ans- Slow dimensional change caused by compression




Ductility


Ans- The ability to undergo change of form without breaking




Elasticity


Ans- Material's ability to recover its initial shape after undergoing a force




Galvanism


Ans- An electrical current generated by dissimilar metals in an acidic

environment




Gelation


Ans- The process of gelling (solidification by cold)

, Imbibition


Ans- Absorption of a solvent by a gel




Malleability


Ans- A material's capacity to be shaped by force or pressure




Microleakage (percolation)


Ans- Passage of oral fluids/bacteria into and out of tooth structure due to

marginal gap or failure of marginal (restorative) seal




Polymerization


Ans- The linking, branching, or cross-linking of smaller molecules




Proportional limit


Ans- The force at which a material cannot return to its original shape




Syneresis

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