Over time the shape of your gums and the bones that support the dentures can change, which means they may no longer fit properly. Relining is a method of adjusting the internal part of the base of the dentures with an acrylic resin to correct their fit. This technique doesn’t alter the appearance of the dentures; it simply adapts the base to suit the changing shape of your gums. The Clinical Dental Technician will take an impression of your gums using your dentures.