Debriding dressing for use with negative pressure and fluid instillation

An apparatus for debriding a tissue site, the apparatus comprising:

• a tissue interface comprising:
• an open-cell reticulated foam layer having a tissue-facing surface and an opposite surface;
• a plurality of perforations extending through the open-cell reticulated foam layer from the tissue-facing surface to the opposite surface, the open-cell reticulated foam forming at least one wall surrounding each perforation, each perforation having a perforation shape factor adapted to collapse the perforation from a relaxed position to a contracted position in response to an application of negative pressure;
• a transverse surface extending between the tissue-facing surface and the opposite surface of each perforation, the transverse surface forming a cutting edge with the tissue-facing surface, and
• the cutting edge of each perforation being adapted to debride the tissue site in response to movement of the tissue interface between the relaxed position and the contracted position.