Relining and Rebasing are usually carried out when the denture no longer fits properly, and it is not necessary to construct a new denture as replacement.
Relines lead to an increase in palate thickness. After too many relines have been performed, a rebase can be carried out to reduce this palatal thickness.
Direct relining is typically performed using a cold cured acrylic or tissue conditioner. The direct reline materials are not very durable and are only a short term solution. An indirect relining will produce a stronger long term finish.
The fitting surface of the denture is cleaned, roughened, and slightly reduced. The flanges are trimmed and the undercuts removed. The new relining material is mixed and applied to the fitting surface of the denture. The denture is inserted and the patient will bite down on the denture for approximately five minutes to form the fitting material and allow it to harden.
The denture is then removed and any minor adjustments are made. Final curing of the new surface may require some additional processes by your dentist. After relining is completed, the denture should now fit better.
The fitting surface of the denture is cleaned. The undercuts are removed and the flanges are shortened. Impression paste is placed over the denture fitting surface, and the patient gently inserts the denture. The denture is then removed and sent to the laboratory for the impression paste to be replaced with a strong heat cured acrylic.