The odontoid process fracture (also known as the PEG or dens fracture) occurs where there is a fracture through the odontoid process of C2. In this case a Type 2. Type 2 - fracture at the base of the odontoid ; unstable, and has a high risk of non-union. See more: http://radiopaedia.org/articles/odontoid-fracture
The miniature horse from an illustrated manuscript of the healing Johan de Alvares salami Ella's 14th Century shows the treatment of a fracture of the cannon bone, which is splinted and wrapped with fixed tow. Noteworthy is also the suspension, with the injured leg should be spared. Cliché Bibliothèque Nationale de France, Paris, Ms espagnol 214, chapter 11, in: van den Driesch and Peters.