DENTAL ASSISTANT LICENSURE
COMPREHENSIVE FINAL EXAMINATION
TEST COMPLETE QUESTIONS AND ANSWERS
2026.
⫸ Of the three classifications of impressions, which one can the
expanded-functions dental assistant legally take? Answer: The dental
assistant can take a preliminary impression (alginate).
⫸ 3. Which of the three classifications of impressions is used for
occlusal relationship? Answer: The bite registration is used for
occlusal relationship.
⫸ 5. Which type of tray allows impression material to lock on
mechanically? Answer: A perforated tray
⫸ 6. What is used to extend the length of a tray? Answer: Utility wax
⫸ What is the organic substance of hydrocolloid materials? Answer:
The organic substance of hydrocolloid is seaweed.
⫸ Why would you select a fast-set alginate over a normal-set
alginate? You would select a fast-set if the patient had a strong gag
reflex. Answer: if the patient had a strong gag reflex.
,⫸ What is the water-to-powder ratio for taking a maxillary
impression? Answer: 3 measures of powder to 3 measures of water.
⫸ What does the prefix hydro- mean? Answer: water
⫸ What is another name for irreversible hydrocolloid? Another name
of irreversible hydrocolloid is alginate. Answer: alginate.
⫸ Do you mix irreversible hydrocolloid on a paper pad or in a mixing
bowl? Answer: It is mixed in a mixing bowl.
⫸ What material is most often used for a bite registration? Baseplate
wax ( either pink sheets or yellow wax bites) is most often used for a
bite registration. Answer: Baseplate wax ( either pink sheets or yellow
wax bites) is most often used for a bite registration.
⫸ 14. What type of tray is used when using ZOE bite registration
pate? Answer: A gauze bite tray
⫸ Do you cool or warm the wax before placing the tray in the
patient's mouth for a bite registration? Answer: You warm the wax
⫸ What is the purpose of dental sealants? Answer: prevent dental
caries in the pits and fissure areas.
, ⫸ Why are pits and fissures susceptible to caries? Answer: because
bacteria cannot be removed from these areas.
⫸ Should sealants be the only preventive measure used? Answer:
Sealants should be used as part of a comprehensive preventive
program.
⫸ What are the two types of polymerization? Answer: light -cured
and self-cured.
⫸ Why is clear sealant material less desirable? Answer: Because it is
difficult to see during placements and recalls.
⫸ Is there a difference in retention rates between filled and unfilled
sealants? Answer: There is no difference in retention rates between
filled and unfilled sealants.
⫸ What is the reason for putting fluoride in dental sealant material?
Answer: In case the sealant is lost, it is thought that the fluoride will
have already strengthened the base of the pit or fissure.
⫸ What is the range of shelf-life of sealant materials? Answer:
between 18 and 36 months.
⫸ What are two patient safety precautions to keep in mind when
using sealants? Answer: Keeping etchant off the soft tissue and patient
eyewear
COMPREHENSIVE FINAL EXAMINATION
TEST COMPLETE QUESTIONS AND ANSWERS
2026.
⫸ Of the three classifications of impressions, which one can the
expanded-functions dental assistant legally take? Answer: The dental
assistant can take a preliminary impression (alginate).
⫸ 3. Which of the three classifications of impressions is used for
occlusal relationship? Answer: The bite registration is used for
occlusal relationship.
⫸ 5. Which type of tray allows impression material to lock on
mechanically? Answer: A perforated tray
⫸ 6. What is used to extend the length of a tray? Answer: Utility wax
⫸ What is the organic substance of hydrocolloid materials? Answer:
The organic substance of hydrocolloid is seaweed.
⫸ Why would you select a fast-set alginate over a normal-set
alginate? You would select a fast-set if the patient had a strong gag
reflex. Answer: if the patient had a strong gag reflex.
,⫸ What is the water-to-powder ratio for taking a maxillary
impression? Answer: 3 measures of powder to 3 measures of water.
⫸ What does the prefix hydro- mean? Answer: water
⫸ What is another name for irreversible hydrocolloid? Another name
of irreversible hydrocolloid is alginate. Answer: alginate.
⫸ Do you mix irreversible hydrocolloid on a paper pad or in a mixing
bowl? Answer: It is mixed in a mixing bowl.
⫸ What material is most often used for a bite registration? Baseplate
wax ( either pink sheets or yellow wax bites) is most often used for a
bite registration. Answer: Baseplate wax ( either pink sheets or yellow
wax bites) is most often used for a bite registration.
⫸ 14. What type of tray is used when using ZOE bite registration
pate? Answer: A gauze bite tray
⫸ Do you cool or warm the wax before placing the tray in the
patient's mouth for a bite registration? Answer: You warm the wax
⫸ What is the purpose of dental sealants? Answer: prevent dental
caries in the pits and fissure areas.
, ⫸ Why are pits and fissures susceptible to caries? Answer: because
bacteria cannot be removed from these areas.
⫸ Should sealants be the only preventive measure used? Answer:
Sealants should be used as part of a comprehensive preventive
program.
⫸ What are the two types of polymerization? Answer: light -cured
and self-cured.
⫸ Why is clear sealant material less desirable? Answer: Because it is
difficult to see during placements and recalls.
⫸ Is there a difference in retention rates between filled and unfilled
sealants? Answer: There is no difference in retention rates between
filled and unfilled sealants.
⫸ What is the reason for putting fluoride in dental sealant material?
Answer: In case the sealant is lost, it is thought that the fluoride will
have already strengthened the base of the pit or fissure.
⫸ What is the range of shelf-life of sealant materials? Answer:
between 18 and 36 months.
⫸ What are two patient safety precautions to keep in mind when
using sealants? Answer: Keeping etchant off the soft tissue and patient
eyewear
