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Coffin bone
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The coffin bone, also known as the pedal bone (U.S.), is the , the bottommost in the front and rear legs of horses, , and other . It is encased by the capsule. In horses and other odd-toed ungulates it is the third phalanx, or "P3"; in even-toed ungulates such as cattle, it is the third and fourth (P3 and P4). The coffin bone meets the short bone or second phalanx at the coffin joint. The coffin bone is connected to the inner wall of the by a structure called the laminar layer. The insensitive laminae coming in from the hoof wall connects to the sensitive laminae layer, containing the blood supply and nerves, which is attached to the coffin bone. The lamina is a critical structure for hoof health, therefore any injury to the hoof or its support system can in turn affect the coffin bone.

Despite the protection provided by the , the coffin bone can be injured and .Vogel (2006), p 189 For example, inflammatory conditions such as may lead to rotation of the coffin bone and associated permanent damage due to the coffin bone pulling away from the hoof wall as the laminar layer tears apart. Pedal is another common inflammatory condition. Fractures can also occur to coffin bones and, depending on the fracture, can cause severe lameness. Other conditions linked to the conformation of the horse, such as may also affect the coffin bone. For example, the coffin joint can become deformed and lead to changes of the coffin bone within the hoof capsule if the horse has an untreated . Contracted heels can also affect the shape of the coffin bone, making it grow away from its normal, healthy shape. X-rays can diagnose injury, determine the position of the bone, and verify the type of damage that may have been received. Once injured, remedial can help protect the coffin bone from further trauma. Treatment of assorted disorders may also involve use of shoe pads, anti-inflammatory medication, and management changes.


See also
  • Skeletal system of the horse
    • Limbs of the horse
      • Equine forelimb anatomy


Notes

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