Complication of fracture scaphoid is
**Core Concept**
The scaphoid bone, one of the carpal bones in the wrist, is prone to fractures due to its unique anatomical structure and location. The scaphoid bone's Blood Supply is tenuous, and its fracture can lead to complications such as non-union, avascular necrosis, and carpal tunnel syndrome.
**Why the Correct Answer is Right**
The most common complication of a scaphoid fracture is non-union. This occurs when the fracture fails to heal due to inadequate blood supply, leading to persistent pain, limited wrist mobility, and potential arthritis. The scaphoid bone receives its blood supply primarily from the radial artery through the dorsal and palmar branches, which enter the bone distally. When a scaphoid fracture occurs proximally, the blood supply to the proximal fragment is often compromised, leading to non-union.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because while carpal tunnel syndrome can be a complication of scaphoid fracture, it is not the most common complication.
**Option B:** This option is incorrect because avascular necrosis is a possible complication of scaphoid fracture but is less common than non-union.
**Option C:** This option is incorrect because while wrist arthritis can be a long-term consequence of untreated scaphoid fracture, it is not a direct complication of the fracture itself.
**Clinical Pearl / High-Yield Fact**
Recall the "Terry Thomas sign" - in scaphoid fractures, the scaphoid bone appears shortened and rotated on the lateral X-ray view. This is a classic radiographic sign of scaphoid fracture.
**Correct Answer: D. Non-union**