With time, shrinkage of denture supporting bone and gums occurs. Most rapid and pronounced shrinkage happens within 6-12 months after tooth extractions, and then it slows down and continues gradually throughout the patient’s life. This creates empty space between the denture and patient’s gums, which results in poor fit and problems with function. Denture relines can be done to fill in the empty space and adapt the denture to the current condition of the gums. There are two types of relines. Soft relines are performed during the healing process within the first 6-12 months after extractions. Hard relines are done in permanent dentures which have been worn for a long time during which the gums have gradually shrunk away. An examination of the patient’s oral cavity and the denture is needed prior to reline to ensure that the denture is not excessively damaged/worn out and that the bite is correct.