The bone at the base of the thumb, by the wrist, is called the scaphoid bone. It’s a small bone that can be broken if you fall onto your outstretched hand. The treatment for the break depends on how severe the break is and if the bone was moved out of place. Usually, if the bone has moved and the broken ends don’t meet each other, surgery is needed. If the bones aren’t moved, doctors are torn as to which method is best.