dental assistant licensure exam study questions with verified solutions

dental assistant licensure exam study questions with verified solutions Is an impression negative or positive reproduction? An impression is a negative reproduction. Of the three classifications of impressions, which one can the expanded-functions dental assistant legally take? The dental assistant can take a preliminary impression (alginate). 3. Which of the three classifications of impressions is used for occlusal relationship? The bite registration is used for occlusal relationship. 5. Which type of tray allows impression material to lock on mechanically? A perforated tray 6. What is used to extend the length of a tray? Utility wax What is the organic substance of hydrocolloid materials? 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. if the patient had a strong gag reflex. What is the water-to-powder ratio for taking a maxillary impression? 3 measures of powder to 3 measures of water. What does the prefix hydro- mean? water What is another name for irreversible hydrocolloid? Another name of irreversible hydrocolloid is alginate. alginate. Do you mix irreversible hydrocolloid on a paper pad or in a mixing bowl? 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. 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? A gauze bite tray Do you cool or warm the wax before placing the tray in the patient's mouth for a bite registration? You warm the wax What is the purpose of dental sealants? prevent dental caries in the pits and fissure areas. Why are pits and fissures susceptible to caries? because bacteria cannot be removed from these areas. Should sealants be the only preventive measure used? Sealants should be used as part of a comprehensive preventive program. What are the two types of polymerization? light -cured and self-cured. Why is clear sealant material less desirable? Because it is difficult to see during placements and recalls. Is there a difference in retention rates between filled and unfilled sealants? There is no difference in retention rates between filled and unfilled sealants. What is the reason for putting fluoride in dental sealant material? 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? between 18 and 36 months. What are two patient safety precautions to keep in mind when using sealants? Keeping etchant off the soft tissue and patient eyewear What determines the effectiveness of dental sealants? Retention of the dental sealant What is the function of a periodontal surgical dressing? It protects the surgical site similar to a bandage. What are the most common materials used for periodontal dressings? zinc oxide-eugenol dressings and non-eugenol dressings. What are the reasons for not using aspirin for pain relief? Aspirin can interfere with blood- clotting mechanism