Scapholunate advanced collapse SLAC and SNAC are two patterns of<unk> , following predictable patterns depending on the type of underlying injury. SLAC is caused by scapholunate ligament rupture, and SNAC is caused by a scaphoid fracture which does not heal and because of that will develop in a non-union fracture. SLAC is more common than SNAC; 55% of the patients with<unk>  has a SLAC<unk> . SLAC Scapholunate advanced collapse (SLAC) is a predictable pattern of<unk>  that results from untreated long-standing scapholunate instability, which in turn is secondary to a rupture of the scapholunate ligament. The main type of such misalignment is dorsal intercalated segment instability (DISI) which is where the lunate angulates to the posterior side of the hand. SNAC Scaphoid nonunion advanced collapse Scaphoid non-union fractures changes scaphoid bone shape, which leads to abnormal joint kinematics. Due to lack of stability from the distorted scaphoid, a DISI can be developed. Scaphoid Non-union Advanced collapse (SNAC) is the pattern of osteoarthritis that eventually develops by this process. Stages Post-traumatic osteoarthritis can be classified into four stages. These stages are similar between SLAC and SNAC<unk> s. Each stage has a different treatment. * Stage I: the osteoarthritis is only localized in the distal scaphoid and radial styloid. * Stage II: the osteoarthritis is localized in the entire radioscaphoid joint. * Stage III: the osteoarthritis is localized in the entire radioscaphoid joint with involvement of the capitolunate joint. * Stage IV: the osteoarthritis is located in the entire radiocarpal joint and in the intercarpal joints. It also may involve the distal radio-ulnar joint (DRUJ). Image:Stadium1osteoarthritis.Stage I Image:Stadium2osteoarthritis.Stage II Image:Stadium3osteoathritis.Stage III Image:Stadium4osteoarhtritis.Stage IV
Wrist osteoarthritis
Trapeziometacarpal osteoarthritis
Back strain
Tarsal tunnel syndrome
Elbow fracture
Sprained ankle
Radial scar
Heel pad syndrome