The bone that originally encircled a tooth's root will start to decay once it is totally extracted. Since the bone is no longer required to protect a tooth, the body repurposes the resources it delivered there.
The jaw's form and gum line alter over time as a result of bone loss brought on by the dentures. With time, the dentures will start to slide off since they no longer fit as securely. In the weeks and months following tooth removal, this process starts quickly. After that, it begins to wane but keeps on for the rest of the patient's life. A denture reline is required to ensure that dentures continue to tightly fit the mouth as it changes over time.