Sidebone is a common condition of horses, characterized by the ossification of the collateral cartilages of the coffin bone. These are found on either side of the foot protruding above the level of the coronary band.

What is side bone in a horse?

Sidebones are a name for a condition that results in ossification of the collateral cartilages of the foot, i.e., the cartilages transform into much harder and less flexible bone. ... Because cartilages are normally elastic, they allow the foot to deform during weight bearing, and then return to its previous shape.

What is side bone called?

Sidebone is the name given to the ossification (bony formations) of the flexible collateral cartilages of the distal phalanx (coffin bone) in the foot. These are found either side of the coffin bone in some horses protruding very little and in others, protruding up towards the level of the pastern joint.