If there was no need for the screw (i.e. your finger was not broken), that would very likely have been malpractice, unless the signs and symptoms you displayed at the time would have convinced the average reasonable doctor that your finger was broken and you needed the screw. It could also be malpractice if you needed the screw, but they put it in wrong or used too long a screw, or did not remove it later when they should have. Based on what you write, you may well have a malpractice case and may be entitled to compensation for any additional medical costs you have incurred and for "pain and suffering" for the pain and life impairment you have experienced. It would worthwhile for you to consult with a medical malpractice attorney about possibly bringing a lawsuit and what your case might be worth. Many such lawyers provide a free initial consultation  to evaluate a case, and you can confirm this before making the appointment.If you want to explore possibly suing, do so immediately: you write that this took place "years" ago, and there is a limit on how long you have to bring cases after you discover the problem or potential malpractice: don't let more time go by before you consult with an attorney. Good luck.