Atlas of Foreign Materials
Polyacrylamide

It is marketed as Aquamid. It is a permanent filler material used for soft tissue augmentation. It is not approved for sale in the United States but can be purchased on-line.

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Polyacrylamide gel low power

Polyacrylamide gel medium power

Polyacrylamide gel med-high power

Polyacrylamide gel high power

Images courtesy of Scripps Oral Pathology