Relines are required when tissue and bone changes occur due to shrinkage.
This can be due to:
loss of bone
loss of weight
loss of teeth
disease or illness
To improve loose dentures, a new base material including acrylic or soft liner materials must be added to the tissue side of a loose denture so it fits properly. Your Prosthetist will need to take an impression inside your existing denture to reline it. Relining affects only the fit of your denture and will not change its appearance.
You should not wear loose dentures. Have them checked immediately if they become loose. Loose dentures can cause excessive friction and pressure toward the gum tissues and bones, resulting in painful sore spots and bone shrinkage.