The normal lifetime of a denture or partial is three to five years, but this can widely vary depending on the patient. Over time dentures or partials may need relining, rebasing, or replacing. Relining is when the lab adds new material to the underside of the denture or partial base to fit your gums. Rebasing is when a new base is made using the existing denture as a model. The artificial teeth from the old denture are used on the new base. The mouth changes naturally with age. Jaws may line up differently as bones and gums ridges recede and shrink. At some point your denture will have to be remade.
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