Final answer:
Intervention for supernumerary digits by an orthopedic surgeon depends on the digit's functionality, interference with normal development, cosmetic factors, and potential associations with other conditions.
Step-by-step explanation:
The intervention by orthopedic consultation for supernumerary digits, also known as polydactyly, is dictated by a variety of factors. These factors include the functionality of the extra digit, the potential for interference with normal hand or foot development and use, cosmetic concerns, and whether the supernumerary digit is associated with other medical conditions or syndromes. The orthopedic surgeon will assess the structure and attachment of the extra digit, which can range from a small, easily removable nubbin to a fully formed, functional digit that shares muscles, bones, and joints with the other digits. In some cases, intervention may involve the removal of the supernumerary digit, while in others, reconstructive surgery might be necessary to ensure proper function and appearance.