Why do scaphoid fractures have AVN?
Avascular necrosis (AVN) is one complication of scaphoid fracture. Since the scaphoid receives its arterial supply in a retrograde fashion (i.e. from distal to proximal pole), the part proximal to the fracture is usually affected. Risk of AVN depends on the location of the fracture.
Can you see a scaphoid fracture on an MRI?
MRI is the most sensitive modality for trabecular fractures, and this can detect completely undisplaced fractures, especially in the first 24 hours following injury 9,13.
What percentage of scaphoid fractures develop avascular necrosis?
Avascular necrosis is common complication of a scaphoid fracture (in around 30% of cases), with its risk increasing the more proximal the fracture. Non-union is the bone failing to heal properly, most commonly due to a poor blood supply.
What is the most common complication of scaphoid fracture?
Nonunion – This is the most likely complication arising from missed scaphoid fractures. The risk is higher in those that are very displaced or have associated carpal fractures.
Will an MRI show a wrist fracture?
Conclusions: Low-field MRI showed a high incidence of fractures in patients with posttraumatic radial wrist tenderness and demonstrated more fractures than radiographs and CT. A scaphoid fracture was by far the most common injury.
Can you do an MRI through a cast?
Physicians sometimes order MRI (magnetic resonance imaging) after your cast is applied to check to see if the two ends of the ruptured tendon are aligned correctly.
How long does avascular necrosis of scaphoid take?
The time taken for the fracture to heal ranges from 6 – 10 weeks.
What nerve is affected in scaphoid fracture?
In all age groups, the fracture may be complicated by injury to the median nerve, injury to the sensory branch of the radial nerve, fracture of the scaphoid, and/or dislocation of the lunate.
How painful is scaphoid fracture?
Scaphoid fractures may heal very slowly or may not heal at all. If you have pain or deep aching on the thumb-side of the wrist, typically after a fall on an outstretched arm, you may have a scaphoid fracture.
What is a nonunion fracture of the scaphoid?
Scaphoid Fracture Non-union. If a Scaphoid fracture does not heal, it is called a Scaphoid Fracture Non-union. If left untreated, the part of the Scaphoid that interacts with the Radius may die, which can lead to painful arthritis in the wrist, developing months to years after the initial injury.
What are scaphoid fractures?
Scaphoid Fracture. The scaphoid bone is a small, boat-shaped bone in the wrist, which, along with 7 other bones, forms the wrist joint. It is present on the thumb side of the wrist causing it to be at a high risk for fractures. A scaphoid fracture is usually seen in young men aged 20 to 30 years.
