Search results
Results from the WOW.Com Content Network
Bone malrotation refers to the situation that results when a bone heals out of rotational alignment from another bone, or part of bone. It often occurs as the result of a surgical complication after a fracture where intramedullary nailing (IMN) occurs, [ 1 ] especially in the femur and tibial bones, but can also occur genetically at birth.
However, fracture healing in horses is complicated by their size, flightiness, and desire to stand. Horses are at risk of re-injury of the fracture site, especially when trying to rise after lying down, or when recovering from anesthesia following fracture repair. Forced recumbency is not an option for horses, making healing more difficult.
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. The lateral cartilages support the hoof wall and provide an important role in the support and cushioning provided to the heel.
Frontal bone: creates the forehead of the horse; Parietal bones: extend from the forehead to the back of the skull; Occipital bone: forms the joint between the skull and the first vertebrae of the neck (the atlas) Temporal bones: contain the eternal acoustic meatus, which transmits sound from the ear to the cochlea (eardrum)
Additionally, horses with a hind limb lameness will tend to reduce the degree of leg use. To do so, some horses will reduce the contraction time of the gluteals on the side of the lame leg, leading to a "hip roll" or "hip dip" and appearance that the hip drops a greater degree on the side of the lame leg. [10]
As horses become older, the cannon bone becomes stiffer and thus bucked shins rarely occur again. Approximately 12% of horses that develop bucked shins go on to have stress or saucer fractures later. [46] Bucked shins force 7% of racehorses to retire. [47] Splints are new bone formation (exostoses) along the involved splint bone. [48]
The prognosis for a horse with navicular syndrome is guarded. Many times the horse does not return to its former level of competition. Others are retired. Eventually all horses with the syndrome will need to lessen the strenuousness of their work, but with proper management, a horse with navicular syndrome can remain useful for some time.
The coffin bone. The hoof of the horse contains over a dozen different structures, including bones, cartilage, tendons and tissues. The coffin or pedal bone is the major hoof bone, supporting the majority of the weight. Behind the coffin bone is the navicular bone, itself cushioned by the navicular bursa, a fluid-filled sac.