Chapter 4 EFDA hottel bases and liners EXAM, /GET IT 100% ACCURATE!!-
2026/2027!! MOST TESTED QUESTIONS AND VERIFIED SOLUTIONS
1. What are the 9 1. caries
reasons to use 2.tramatic occl.
bases and liners? 3. effect of cutting bus
4. desiccation
5. condensation pressure
6. chemical irritation
7. temperature changes
8. dimensional changes
9. lack of marginal seal
2. Basic function of 1. seal off dentin tubules/ prevent chemical irritation
a sealer? 2. reduces leakage around restoration
3. Do not offer thermal protection
3. Cavity varnish a thin layer placed on the floor and walls of the preparation to seal the tubules and
minimize micro-leakage on amalgam fillings.
4. What is a rein- used to protect the pulp from pressures during condensing
forcer?
5. Types of Rein- any material used in a thick layer between floor of prep and restorative material.
forcers
6. Insulators protect pulp from thermal irritation
7. types of insula- 1.zinc oxide eugenol
tors 2. zinc phosphate cement
3. zinc polyacrylic cements
8. Zinc oxide Temporary cement - sedates the pulp
eugenol oil of cloves
1/5
, Chapter 4 EFDA hottel bases and liners EXAM, /GET IT 100% ACCURATE!!-
2026/2027!! MOST TESTED QUESTIONS AND VERIFIED SOLUTIONS
base and reinforcer
eugenol interferes with the setting of resins
9. Zinc phosphate insulator and reinforcer
cement main ingredient is phosphoric acid
can irritate the pulp from exothermic reaction
can go under amal fillings to reduce gray appearance
mixed on a cool glass slab
10. Zinc Polyacrylate weaker than zinc phosphate but not as irritating
Cement has poor handling qualities
11. obtundents have the ability to soothe the sensitive pulp or reduce the irritability of a pulp
-eugenol/oil of cloves
12. pulp stimulators 1.placed in deep cavity preps where remaining layer of dentin is thin in order to
stimulate a thickening of the dentin (secondary dentin formation)
2.provides protection from chemical irritation
ex: Calcium Hydroxide
13. Calcium hydrox- 1.used as a pulp stimulator
ide 2.can be used as indirect or direct pulp cap
3.necrosis may occur with direct pulp cap
14. Minimal depth 0.5mm to 1.5mm
restoration no stimulator or base needed
15. second type of --1mm into the dentin but more than 0.5mm away from the pulp
cavity prepara- --calcium hydroxide is needed, thickness no more than .5mm
tion --excess hydroxide should be removed and not more than 1.0 mm from the
cavosurface margin
2/5
2026/2027!! MOST TESTED QUESTIONS AND VERIFIED SOLUTIONS
1. What are the 9 1. caries
reasons to use 2.tramatic occl.
bases and liners? 3. effect of cutting bus
4. desiccation
5. condensation pressure
6. chemical irritation
7. temperature changes
8. dimensional changes
9. lack of marginal seal
2. Basic function of 1. seal off dentin tubules/ prevent chemical irritation
a sealer? 2. reduces leakage around restoration
3. Do not offer thermal protection
3. Cavity varnish a thin layer placed on the floor and walls of the preparation to seal the tubules and
minimize micro-leakage on amalgam fillings.
4. What is a rein- used to protect the pulp from pressures during condensing
forcer?
5. Types of Rein- any material used in a thick layer between floor of prep and restorative material.
forcers
6. Insulators protect pulp from thermal irritation
7. types of insula- 1.zinc oxide eugenol
tors 2. zinc phosphate cement
3. zinc polyacrylic cements
8. Zinc oxide Temporary cement - sedates the pulp
eugenol oil of cloves
1/5
, Chapter 4 EFDA hottel bases and liners EXAM, /GET IT 100% ACCURATE!!-
2026/2027!! MOST TESTED QUESTIONS AND VERIFIED SOLUTIONS
base and reinforcer
eugenol interferes with the setting of resins
9. Zinc phosphate insulator and reinforcer
cement main ingredient is phosphoric acid
can irritate the pulp from exothermic reaction
can go under amal fillings to reduce gray appearance
mixed on a cool glass slab
10. Zinc Polyacrylate weaker than zinc phosphate but not as irritating
Cement has poor handling qualities
11. obtundents have the ability to soothe the sensitive pulp or reduce the irritability of a pulp
-eugenol/oil of cloves
12. pulp stimulators 1.placed in deep cavity preps where remaining layer of dentin is thin in order to
stimulate a thickening of the dentin (secondary dentin formation)
2.provides protection from chemical irritation
ex: Calcium Hydroxide
13. Calcium hydrox- 1.used as a pulp stimulator
ide 2.can be used as indirect or direct pulp cap
3.necrosis may occur with direct pulp cap
14. Minimal depth 0.5mm to 1.5mm
restoration no stimulator or base needed
15. second type of --1mm into the dentin but more than 0.5mm away from the pulp
cavity prepara- --calcium hydroxide is needed, thickness no more than .5mm
tion --excess hydroxide should be removed and not more than 1.0 mm from the
cavosurface margin
2/5
