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Poor Bond of Impression Material to the Tray

Visual Appearance: Impression pulling away from the sides/bottom of tray.

Result: Crown(s) may be tight and not seat fully, or require excessive internal adjustment.

Click to enlarge
Separation of Material from Tray

 

 
CAUSE SOLUTION

No tray adhesive used.

  • Use tray adhesive.

Incompatible tray adhesive used.

  • Use appropriate tray adhesive. VPS adhesive for VPS. Polyether adhesive for polyether materials.

Inadequate drying time for tray adhesive.

  • Follow manufacturer’s instructions for application and drying time.

Thin plastic trays allow deflection, which can cause rebound upon removal.

  • Use a tray that fits better, and is stiffer and more rigid.


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