The most common problems that occur after wearing a removable partial denture for a period of time include fracture of the retainer, fracture of the abutment, and loss of the artificial tooth. In what cases can they be repaired and in what cases do they need to be recreated? Generally speaking, the original denture has good stability and retention in the mouth, and the broken part of the abutment is made of plastic and can be repaired. In addition, if there are individual natural teeth missing again within the range of the abutment, transitional restoration can also be done by adding artificial teeth. On the contrary, if there is excessive alveolar bone resorption, the retention and stability of the denture is poor, and there are multiple missing natural teeth, the simple repair method is not suitable, but a new denture is required.