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Visual Appearance: Heavy body and light body materials not blended, or mixed together.

Result: Restoration will not seat or fit properly.

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Poor Bond Between Heavy Body and Light Body Material



Exceeding the working time.

  • Follow manufacturer’s working time specifications.
  • Choose material with longer working time.

Impression material stored at elevated temperature.

  • Store impression material at room temperature.

Sulfur or acrylic contamination of pre-set heavy body material in two-step technique.

  • Avoid contact with sulfur contaminants: Wear gloves proven not to contain traces of sulfur.
  • Avoid contact with acrylic and methacrylic contaminants: Ensure impression material does not come into contact with methacrylate residue from acrylate temporary materials.


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