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Dental Materials NBDHE Dental Materials NBDHE from Dental Hygiene Seminars Board Review 2020 textbook Questions and Answers $14.49   Add to cart

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Dental Materials NBDHE Dental Materials NBDHE from Dental Hygiene Seminars Board Review 2020 textbook Questions and Answers

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Adhesion Ans- the chemical attraction between *unlike* molecules Cohesion Ans- the chemical attraction between *like* molecules Coefficient of thermal expansion Ans- An index which indicates how one material reacts to temperature extremes in relation to another Compressive strength Ans- th...

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  • August 2, 2024
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Dental Materials NBDHE
Dental Materials NBDHE
from Dental Hygiene
Seminars Board Review
2020 textbook 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 indicates 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- a 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 a

marginal gap or failure of the marginal (restorative) seal




Polymerization

, Ans- the linking, branching, or cross-linking of smaller molecules to generate a

larger molecule, as seen with composite bonding and impression setting




Proportional limit


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




Syneresis


Ans- Contraction of a gel due to the loss of a solvent




Tensile strength


Ans- The force needed to stretch a material to the point of fracture




Viscosity


Ans- resistance to flow (the higher it is, the lower the flow)




*mouthwash has lower than toothpaste

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