Question 202 · LDEK · Impressions and impression materials
Which of the following impression materials should not be used in the case of deep undercuts?
- A. alginate (irreversible hydrocolloid).
- B. zinc oxide-eugenol paste.
- C. agar (reversible hydrocolloid).
- D. addition silicone.
- E. polyether.
Hint
Think about which of these materials becomes rigid after setting and therefore cannot flex past an undercut during removal.
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