There are four main methods of restoring missing teeth: 1, removable partial denture, which is commonly known as movable teeth. It has a wide range of application, mainly for single teeth, multiple teeth, and even full mouth missing can be restored by movable denture, the cost is more economical and the frequency of use is higher; 2, fixed bridge, which is what we call fixed teeth. It relies on the two ends of the abutment teeth to connect the missing parts, forming a whole of three units or four units, it has high requirements for both sides of the abutment teeth, such as both sides of the teeth, to have strong roots and no obvious periodontal disease; 3, fixed movable joint restoration, such as some peg-bolus attachment class, its advantage is smaller than the traditional movable teeth will be better comfort, and then will be more than the traditional The advantage is that it will be smaller and more comfortable than traditional movable teeth, and then it will have a higher chewing rate than traditional movable teeth, but relatively less demanding and more comfortable than fixed teeth; 4, dental implants, referred to as the third set of human teeth, which are artificial roots planted into the alveolar bone and crowned on top for the restoration process, it is more expensive, but its ability to restore the chewing function of teeth is the strongest, close to natural teeth, basically restoring 99% of the function.