The removable partial denture can be used with 2-4 rings depending on the situation. The removable partial denture needs rings for stabilization so that it can function. The number of removable partial denture rings is determined by the number of teeth still present in the mouth and the condition of the teeth, for example, if there are only 2 teeth left below, only 2 rings can be placed, and if there is only 1 tooth, only 1 ring can be placed. If there are teeth in the near and far center of the missing teeth, and there are also teeth on the opposite side, then 3 retainers can be used, that is, 2-4 retainers can be used depending on the specific situation, so as to solve the stability of the removable partial denture. The function of the retainer is to stabilize the removable partial denture, and the number and the way it is used will be determined by the doctor after the oral examination. The number of rings and the way they are used are determined by the doctor after the oral examination. The form of rings can be replaced by invisible denture for anterior teeth, which is more aesthetic, and metal rings for posterior teeth, which is more stable. In addition, cast rings can be used, as well as bent rings. Cast rings are more stable, while bent rings are less damaging to the abutment teeth, for example, for loose teeth, bent rings are better when porcelain teeth are used as abutment teeth.