DHYG 4015 Dental Materials FINAL | Questions with 100% Verified Answers | Latest Update

DHYG 4015 Dental Materials FINAL | Questions with 100% Verified Answers |
Latest Update

Question: Thermal Expansion / Conductivity
Answer:
Expansion of material with heat; conduction is ability to transfer heat.

Question: Galvanism
Answer:
Electric current between two different metals in saliva.

Question: Galvanic Shock
Answer:
Sharp pain caused by galvanic current.

Question: Percolation
Answer:
Movement of fluids in/out of tooth-restoration interface due to thermal changes.

Question: Stress / Strain
Answer:
Stress = force per area; Strain = deformation from stress.

Question: Elasticity
Answer:
Ability to return to original shape after stress removed.

Question: Creep
Answer:
Slow permanent deformation under constant load.

Question: Tarnish
Answer:
Surface discoloration without material loss.

, Question: Corrosion
Answer:
Chemical deterioration, surface or internal.

Question: Knoop Hardness
Answer:
Test measuring hardness by indentation.

Question: Wettability
Answer:
Ability of liquid to spread on a surface (important for bonding).

Question: Sealants
Answer:
Resin material that seals pits and fissures to prevent decay.

Question: Etching materials/process
Answer:
30-50% phosphoric acid, removes smear layer, roughens enamel for bonding.

Question: Indications
Answer:
Newly erupted molars, high caries risk, deep pits/fissures.

Question: Contraindications
Answer:
Existing decay, poor behavior for isolation, insufficient eruption.

Question: Seal & Protect / Hurriseal
Answer:
Used to protect newly etched surfaces or seal small defects. Applied similarly, light cured.

Question: Types of Impression Materials
Answer:
Irreversible (alginate), Reversible (agar).