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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Most common complication of scaphoid fracture?
assistant
The correct answer is  Ans. is `b' i.e., Avascular necrosis Complication of scaphoid fracture Fractures of the scaphoid bone, even when undisplaced, are potentially troublesome and the incidence of complications is high. The most impoant complications are :- Delayed union Non-union Avascular necrosis Osteoahritis of wrist "AVN is the most common complication of a scaphoid fracture, occuring in 15% to 30% of cases". o Risk of AVN depends on the location of the fracture :- Fracture of proximal segment (proximal 1/3) has the highest risk Fracture of middle segment (waist) has moderate risk Fracture of distal segment rarely causes AVN The proximal pa is more susceptible for AVN because of retrograde vascular supply. Most of the blood supply to the scaphoid enters distally, and proximal pa has precarious supply after fracture through waist or proximal pa of the bone. Therefore, AVN occurs in proximal pa.