provisional callus(redirected from temporary callus)
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the callus that develops to keep the ends of the fractured bone in apposition; it is absorbed after union is complete.
Synonym(s): temporary callus
A temporary deposit between the ends of a fractured bone that is reabsorbed when true bone develops.
See also: callus
1. localized hyperplasia of the horny layer of the epidermis due to pressure or friction. In dogs, these often form over pressure points such as the elbow, hock and (in some breeds) sternum, particularly if the animal is sleeping on a hard surface.
2. an unorganized network of woven bone formed about the ends of a broken bone; it is absorbed as repair is completed (provisional callus), and ultimately replaced by true bone (definitive callus).
bridging the callus gap.
around the outside of a fracture.
a form of delayed healing in which fibrocartilage forms between fracture fragments, resulting in a false callus. Called also elephant's foot callus.
between the ends of fractured bones.
new bone formed by the proliferation of periosteal osteogenic cells.
a subsequently remodeled callus.
secondary bacterial infection, particularly of pressure point calluses in dogs; can be extensive with deep pyogenic inflammation.
the originating fibobrocellular tissue before calcification.
may develop over a prominent sternum in some breeds of dogs, particularly Dachshunds, in response to pressure.
see provisional callus (above).