Reference no: EM133362650
Questions
1. At present, the most common method of creating space in the gingival sulcus of a prepared tooth for wash (syringe) material is which one of the following?
a. Retraction paste
b. Retraction cord
c. Laser troughing
d. Electrosurgical troughing
2. Which one of the following astringents has the potential to be dangerous to patients with cardiovascular disease?
a. Racemic epinephrine
b. Ferric sulfate
c. Aluminum chloride
d. ViscoStat
3. Reasons the wash material may tear when removing the set impression from the mouth include all of the following except one. Which one?
a. Narrow sulcus width (<0.2 mm)
b. Very deep sulcus
c. Sharp edges on the preparation
d. Removing the impression with a snap
4. A successful double-bite impression for a crown on tooth #30 includes all of the following except one. Which one?
a. The margins of the preparation are shiny and rounded.
b. The margins and a little of the tooth beyond are captured in the impression.
c. No large voids are present in the walls of the preparation.
d. Opposing teeth are captured in the proper bite relation.
5. Digital impressions have several advantages over traditional impressions. Which one of the following is not an advantage?
a. Impression material and associated supplies are not needed.
b. Digital impressions can be electronically transferred to the laboratory.
c. Images of the preparation can be viewed from multiple angles before being sent to the laboratory.
d. Gingival retraction is not needed for preparations with subgingival margins.
6. Which one of the following impression materials is least affected by soaking it in a disinfectant solution for 2 hours?
a. Alginate
b. Polyether
c. Polyvinyl siloxane
7. Disinfecting of impressions
a. Is done to protect the patient from surface bacteria.
b. Must be done for all impressions..
c. Is done only with impressions for patients with known infectious diseases.
d. Does not need to be done for the new alginates that have bactericidal chemicals incorporated into them.