If the movable denture is a partial denture, mainly rely on the carabiner for retention, the carabiner hook on top of the normal teeth, if the loosening can be done as follows: 1, the most common reason is that the carabiner hook is unstable, you need to go to the hospital in time for a follow-up, according to the situation of the carabiner to tighten up the force; 2, denture attached to the bed of the teeth, the base tray if it is not close, or after the extraction of teeth after the bed of the teeth has not yet been grown, the denture out of the denture is not close, resulting in occlusal Sinking, hook card loosening, need to go to the hospital, relining heightened, or do other treatment; 3, denture edge is too long, the bed of the teeth is more atrophied, when you speak or move, the mucosal muscles pull, bring up the denture, loosening; 4, hooks above a position from the teeth above the span, if the position is not suitable, will lead to the whole denture prying, denture is more prone to loosening, you need to go to the hospital in time to the doctor, do not modify by yourself. Do not modify on your own.