Atlas of Foreign Materials
PVA Sponge

A sponge manufactured of polyvinyl alcohol foam. It is used in many medical specialties. In the head and neck area, it is often used as a wound dressing. It is marketed as Hydrofera.

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PVA sponge 2x

PVA sponge 4x

PVA sponge 10x

PVA sponge 40x

Images courtesy of Tufts University School of Dentistry