The gum tissue changes shape and often “shrinks” over time, especially for those who are denture wearers. This often results in dentures that are loose and ill fitting. Often a denture reline can be completed in order to fit the new shape of the gums better and therefore improving the fit of the denture. In order to do this, an impression is taken inside of the existing denture. The denture may be relined in the office or may need to be sent out to a dental lab in order for the reline to be completed.