SIMPLE - A clean break across the bone, separating it into two pieces.
MULTIPLE - More than one fracture site, with substantial distance between each.
COMPOUND - The bone fractures and breaks the skin causing a open wound which leads to the fracture site increasing the chances of a infection occurring.
COMMINUTED- The bone is shattered as opposed to cleanly broken. There are often more than two or three fragments involved.
COMPLICATED - This is where a bone fractures and damages/breaks/punctures a blood vessel, nerve or organ situated around the fracture site. Example: Ribs breaking and puncturing a lung.
OBLIQUE - A break in the bone which is diagonal along the bones axis.
GREENSTICK - Incomplete break of the bone which are usually seen in the young animals as their bones are not fully developed.
AVULSED - When a part of the bone is torn away from the main mass of the bone, usually due to extreme muscle pull.
OVERRIDING - The bone fractures and one of the fragments slips over the other out of place.