Compressible adjunct with attachment regions

A staple cartridge assembly for use with a surgical stapling instrument, wherein the staple cartridge assembly comprises:

• a compressible adjunct comprising:
• attachment regions, comprising a material having a first phase transition temperature;
• and
• non-attachment regions surrounding the attachment regions, the non-attachment regions comprising a material having a second phase transition temperature greater than the first phase transition temperature;
• and
• a staple cartridge, comprising:
• a proximal end;
• a distal end;
• a deck comprising an outer surface, wherein the compressible adjunct is configured to be positioned against the outer surface of the deck;
• a longitudinal row of staple cavities defined in the deck between the proximal end and the distal end, wherein the staple cavities of the longitudinal row are positioned along a longitudinal axis extending through the proximal end and the distal end of the staple cartridge;
• staples removably positioned in the staple cavities;
• bonding zones, wherein the bonding zones are defined as portions of the outer surface of the deck longitudinally extending along the longitudinal axis between staple cavities of the longitudinal row, wherein the attachment regions of the compressible adjunct are configured to be secured to the bonding zones by undergoing a phase transition against the bonding zones, wherein the phase transition is associated with a temperature greater than or equal to the first phase transition temperature;
• and
• deck protrusions configured to engage the compressible adjunct to establish an initial alignment between the attachment regions of the compressible adjunct and the bonding zones prior to the phase transition, and to maintain the attachment regions against the bonding zones during the phase transition.