Which of the following is correct glass transition temperature of Impression compound ?
Correct answer: B. 39°C
- A. 43.5°C
- B. 39°C
- C. 65°C
- D. 100°C
Explanation
Impression compound has a glass transition temperature close to 39°C, which explains its thermoplastic softening and hardening behavior around oral temperatures. Its working softening range is higher than this transition temperature.
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