The tip of a stainless steel diamond encrusted explorer tool broke off on removal, inverted and got stuck in another canal which had been cleaned out and has medication. He was more concerned with the calcified 4th canal. He is hoping he will have more success removing the tip in 6months time. Is it ok to have this stuck in my tooth permanently if he can't remove it? Should I just get the tooth out considering he can't get past the blockage in the 4th canal?