Most rigid elastomer is___________________?
Correct answer: A. Polyether
- A. Polyether
- B. Polysulphide
- C. Addition silicone
- D. Condensation silicone
Explanation
Polyether is the most rigid of the commonly used elastomeric impression materials because its set polymer has a high modulus and low flexibility. This rigidity improves stability but makes removal from pronounced undercuts more difficult.
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