Abstract
Introduction: Scaphoid Nonunion Advanced Collapse (SNAC) is a common cause of traumatic wrist degeneration. Scaphoid excision and Four-Corner Fusion (4-CF) has been shown to be an effective treatment option to relieve pain and in the same time preserve a good functional range of wrist motion.
Highlights
Scaphoid Nonunion Advanced Collapse (SNAC) is a common cause of traumatic wrist degeneration
Anti grade insertion of the screws did not have a deteriorative effect on the final outcome
Scaphoid Fracture and nonunion results in disturbance of the normal carpal bone biomechanics resulting in abnormal movement behavior and increased stresses across the inter-carpal articulations. This when left untreated will eventually end in a progressive collapse of the carpal bone followed by development of radio-carpal osteoarthritis known as Scaphoid Nonunion Advanced
Summary
Scaphoid Nonunion Advanced Collapse (SNAC) is a common cause of traumatic wrist degeneration. Scaphoid Fracture and nonunion results in disturbance of the normal carpal bone biomechanics resulting in abnormal movement behavior and increased stresses across the inter-carpal articulations. This when left untreated will eventually end in a progressive collapse of the carpal bone followed by development of radio-carpal osteoarthritis known as Scaphoid Nonunion Advanced. In stage II, the degenerative changes affect the entire radio-Scaphoid articular surface. In stage III, the degenerative changes affect the capito-lunate joint. Whatever the stage of SNAC wrist, the radio-lunate joint was always spared from the degenerative
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