5 Questions
What precaution should be taken when removing the cast from the impression?
Avoid any breakage
Why is it crucial to handle the removal of the cast carefully?
To prevent the impression from being destroyed
What characteristic is mentioned about the impression in the text?
It repels water
Why is it advised to be cautious while dealing with the cast from the impression?
To avoid damaging it during removal
What potential risk exists if the cast is removed carelessly?
It might break or get damaged
Study Notes
Polyether Impression Material
- Polyether is a synthetic polymer that can be converted to solid rubber at room temperature by mixing with a suitable catalyst.
- Uses of polyether impression material:
- Crown and bridge impressions
- General use in all cases
- Also known as Mercaptan or Thiokol
- Presentation: comes in collapsed tubes as base and accelerator or catalyst
- Properties:
- High tear strength
- Low hardness
- Good flexibility
- Hydrophobic (requires mouth to be dried before making an impression)
- Important notes:
- Cast removal from impression requires care to avoid breakage
- Despite being hydrophobic, polyether is actually hydrophilic
Test your knowledge on synthetic polymers that can be converted to solid rubber at room temperature with the addition of a catalyst. Explore the synthesis process and properties of elastomers in this quiz.
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