New dentures will typically fit your mouth securely as they have been designed specifically for you. As time goes on, your gum tissues will change and the fit of the denture will become less secure and thus more prone to movement. Having the denture professionally relined every two to five years will keep the denture secure and functional.
All full dentures may need a hard reline every two to five years. An impression is made inside your existing denture. It is then sent to the lab, where the impression material is replaced with hard acrylic. This results in a more secure fit of the denture in your mouth.
If dentures have not been serviced in quite some time, a patient’s gums may be red, swollen, or misshapen. This creates problems in taking impressions for a new hard or soft reline and may lead to a denture that would perpetuate the problem.
A temporary, or palliative (medicated) reline material may be recommended to allow the inflammation to subside. This reline makes the denture fit much more tightly, and is usually soft and pliable. After a few weeks, the gums return to a more normal state. The patient is then ready for his new denture or hard reline.