Question 312 (part 2) · LDEK · Impressions and impression materials
Vasoconstrictors based on iron compounds should not be used for retraction in case of taking the impressions with some elastomer impression materials, due to the fact of inhibiting the process of theirs curing. It concerned the following impression materials:
- A. type A silicone .
- B. type C silicone, polysulfide.
- C. type A silicone, polysulfide.
- D. type A and C silicone.
- E. Polysulfide.
Hint
Ask which elastomer sets by a platinum-catalysed addition reaction that is easily disturbed by contaminants.
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