Final answer:
To treat a humpback deformity of the scaphoid, surgical intervention such as open reduction and internal fixation, often accompanied by a bone graft, is typically the best approach.
Step-by-step explanation:
The humpback deformity of the scaphoid is usually a result of a nonunion or delayed union of a fracture in the scaphoid bone in the wrist. The best approach to treating a humpback deformity of the scaphoid is typically through surgical intervention, specifically an open reduction and internal fixation (ORIF) procedure. This surgery aims to realign the bone fragments, followed by the fixation with screws or pins. In some cases, especially when there is avascular necrosis or significant bone loss, a bone graft may also be necessary to stimulate healing and provide additional structural support.