Question

A clinician is rehabilitating the lower left quadrant with a 3-unit metal-ceramic bridge and the patient exhibits a pronounced gag reflexWhich elastomeric impression material would be most appropriate to minimize discomfort?

• A. Addition silicone
• B. Condensation silicone
• C. Polyether
• D. Polysulfide

Hint:

For patients with gag reflex, choose impression materials with short setting time and neutral taste — Addition silicone is preferred.

Answer 1

The Correct Option is A

Step 1: Understanding the Clinical Situation.
The patient has a pronounced gag reflexTherefore, the ideal impression material should have short setting time, good dimensional stability, pleasant odor, and minimal taste to reduce discomfort
Step 2: Evaluation of Materials.
(A) Addition silicone (Polyvinyl siloxane) has excellent dimensional stability, short setting time, neutral taste and odor, and good patient comfort
(B) Condensation silicone releases alcohol during setting which may cause dimensional changes and has comparatively less stability
(C) Polyether is more rigid and has a bitter taste which may increase gag reflex
(D) Polysulfide has an unpleasant odor and longer setting time, making it uncomfortable for gagging patients
Step 3: Conclusion.
Addition silicone is most appropriate because it sets quickly, is comfortable for the patient, and minimizes gag reflex