"Cancellous bone, synonymous with trabecular bone or spongy bone, is one of two types of osseous tissue that form bones. The other osseous tissue type is cortical bone....Its Latin name is substantia spongiosa or substantia spongiosa ossium."
http://en.wikipedia.org/wiki/Cancellous_bone

"OPT Croutons
OPT Croutons are a synthetic bone substitute made of pure beta-TCP which is a calcium phosphate molecule similar to the mineral phase of natural bone.
OPT Croutons are designed to fill bone voids or defects of the skeletal system (such as the extremities and pelvis) that are not intrinsic to the stability of the bony structure. These defects may be surgically created osseous defects or osseous defects created from traumatic injury to the bone."
http://www.acumed.net/opt-croutons

See also the image on this website.


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Note added at 2 hrs (2014-02-06 13:47:04 GMT)
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"Autograft, cancellous allograft croutons, and demineralized bone matrix were used to fill bone defects as needed. The acetabular bone deficiency was ..."
http://www.healio.com/~/media/Journals/ORTHO/2012/1_January/...

"... impaction grafting is large (~10 mm), often with hand preparation of “croutons” pinched from the donated cancellous bone of the femoral head using nibblers."
books.google.ch/books?isbn=0824750837