Aluminum is a more chemically reactive metal than iron and thus should be less corrosion-resistant than steel. However, the actual answer to the above question on which metal is more corrosion resistant is: it depends on your formula chemistry.
Occasionally, a splint may be used to hold the break in place while it heals. If the break has caused the bone fragments to move by a large amount, then finger manipulation may be needed to realign the bone. A splint is then used to hold the bone in place while it heals. Some broken fingers need operations to give them the best chance of healing. This can be due to the break being unstable (ie after manipulation, the bone ends are being pulled out of place by adjacent muscles). What operations may be needed for broken fingers?
Treatment of broken fingers depends on the type of fracture and particular bone in the finger that is injured. The emergency doctor or an orthopedic surgeon will assess the stability of the broken finger. 1  If the fracture is stable, treatment may be as simple as buddy taping (splinting one finger to another by taping them together) for about four weeks followed by an additional two weeks with no strenuous exercise. If the fracture is unstable, the injured finger will need to be immobilized.