Question 60 · LDEK · Impressions and impression materials
In what way should the upper custom impression tray be shaped for functional impression in edentulous patient?
- A. impression tray should exceed the borders of non-movable and movable mucosa.
- B. impression tray should cover the upper labial frenulum.
- C. impression tray should cover the ligaments of the cheeks.
- D. impression tray should elevate with the opening of the mouth.
- E. impression tray should not reach closer than 1 mm from the border of movable and non-movable mucosa and should pass by the frenulum of the lips and ligaments of the cheeks.
Hint
In a functional impression the border zone is shaped by the material during movements, not by the rigid tray itself.
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