Dr. Ebraheim’s educational animated video describes seymour fracture of the distal phalanx.
Seymour fracture is an extra-articular transverse salter type I or type II fracture at the base of the distal phalanx.
Anatomy
Avulsion of the proximal edge of the nail from the nail fold. It is flexion injury that leads to physeal separation between the extensor tendon dorsally and the flexor digitorum profundus volarly. In addition to avulsion of the nail plate, there is disruption of the germinal matrix. The finger is flexed and looks like a mallet fracture with the nail appearing too long. The injury is an open fracture that is not a mallet fracture, and should not be treated by a splint alone.
This is Seymour fracture. Notice that the nail appears longer than normal. There will be bleeding around the nail bed and if the fracture is missed, there may be complications such as infection and finger deformity.
•Treatment
•Remove the nail and debride the wound.
•Reduce the fracture, fix it with K-wire and repair the nail bed.
•Splint the fracture or use a cast.
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