Final answer:
Scapholunate dissociation is an injury of the ligament between the scaphoid and lunate bones in the wrist, often leading to instability. Diagnosis is via radiograph and adequate immobilization is essential for proper healing. Soft tissue involvement may include inflammation and muscle damage, with a risk of bone necrosis.
Step-by-step explanation:
Scapholunate dissociation refers to the injury of the scapholunate ligament in the wrist, which can result in instability between the scaphoid and lunate bones of the carpus. This condition often follows a trauma such as a forceful impact on an outstretched hand, possibly causing a wrist sprain or fracture. Post-injury, soft tissue involvement may include inflammation, muscle damage, or potential scar tissue formation.
Proper diagnosis is made via radiograph, which can reveal the extent of injury. Poor blood supply to the area can slow healing and increase the risk for bone necrosis and subsequent degenerative joint disease. Adequate immobilization is crucial for proper healing to prevent misalignment of the affected bones caused by muscle contractions.