RDA Dental Instruments and Tray Setups 5 — Questions and Answers
Question 1: Which instrument in a crown and bridge tray setup is used to seat and remove temporary crowns?
- Crown remover (crown and collar scissors or crown puller) (Correct answer)
- Hemostat
- Amalgam carrier
- Band pusher
Correct answer: Crown remover (crown and collar scissors or crown puller)
A crown remover or crown puller is used to dislodge temporary and permanent restorations without damaging the tooth or crown.
Question 2: What is the function of articulating paper during a crown cementation appointment?
- To check the occlusion of the newly cemented crown (Correct answer)
- To isolate the tooth from saliva
- To apply cement to the crown margins
- To remove excess cement interproximally
Correct answer: To check the occlusion of the newly cemented crown
Articulating paper marks high spots on the crown when the patient bites, allowing the dentist to adjust the occlusion.
Question 3: A scalpel handle (#3) loaded with a #15 blade is most commonly used during which procedure?
- Soft tissue surgical procedures such as gingivectomy (Correct answer)
- Rubber dam placement
- Crown preparation
- Root canal therapy
Correct answer: Soft tissue surgical procedures such as gingivectomy
A #3 scalpel handle with a #15 blade is a standard surgical setup used for incisions in soft tissue periodontal and oral surgery procedures.
Question 4: Which instrument is used to check the depth and contour of a periodontal pocket?
- Periodontal probe (Correct answer)
- Explorer
- Curette
- Sickle scaler
Correct answer: Periodontal probe
A periodontal probe has millimeter markings and a blunt tip used to measure pocket depths around each tooth.
Question 5: In an extraction tray setup, what is the role of the surgical elevator?
- To loosen the periodontal ligament and luxate the tooth before forceps use (Correct answer)
- To irrigate the socket after extraction
- To place sutures post-extraction
- To retract the cheek during extraction
Correct answer: To loosen the periodontal ligament and luxate the tooth before forceps use
Elevators are inserted into the PDL space to sever periodontal fibers and loosen (luxate) the tooth prior to forceps application.
Question 6: Which component of the endodontic tray setup is used to determine the working length of the root canal?
- Endodontic ruler with rubber stops on files (Correct answer)
- Spreader
- Plugger
- Barbed broach
Correct answer: Endodontic ruler with rubber stops on files
Rubber stops placed on endodontic files at the measured working length allow the clinician to prevent over-instrumentation of the canal.
Question 7: When setting up a tray for rubber dam placement, which instrument is used to punch the holes in the rubber dam material?
- Rubber dam punch (Correct answer)
- Rubber dam forceps
- Rubber dam frame
- Dental floss
Correct answer: Rubber dam punch
The rubber dam punch has a rotating disc with holes of varying sizes used to create openings in the dam for individual teeth.
RDA Dental Instruments and Tray Setups 5
Which instrument in a crown and bridge tray setup is used to seat and remove temporary crowns?