Denture relines are not permanent for a number of reasons. First off, your bones and gums change over the years, leading to dentures which no longer fit as well as they once did. Hard relines typically need to be redone every two years, sometimes lasting up to four years. If your bone changes are substantial or your teeth become too worn, it might be time to get a new denture. If you suspect it is time for a new reline, contact us today.