1. When the oral cavity is in a resting state, the dentures have poor adsorption after wearing and are easy to loosen and fall off. This is due to the lack of close contact between the tissue surface of the base and the mucous membrane, or insufficient stretching of the edge of the base, resulting in a poor sealing effect. It should be treated by padding or extending the edge of the base.
2. When the mouth is at rest, the dentures are well retained, but they tend to fall off when opening the mouth or speaking. This is because the edge of the base is too long, the lip, buccal, and lingual frenulum area are too thick to cushion, or the position of the artificial teeth is too biased towards the lip, buccal or lingual side of the alveolar crest, which affects the physiology of the tongue and surrounding muscles. caused by exercise. The corresponding treatment methods are: grinding and modifying the edge buffer frenulum that is too long or too thick to form the proper shape of the polished surface of the base, or properly grinding off the buccal and lingual surface of a part of the artificial tooth, etc.
3. If the retention is good, but it is loose or easy to dislocate during chewing, it is mostly due to the imbalance of the bite and the warping of the denture during chewing. Early contact points should be checked out and occlusion adjusted.
