Generally speaking, it is necessary to set teeth in time after tooth extraction (about 3 months after tooth extraction). This is because: the alveolar bone will continue to resorb after tooth loss, thus leading to gradual shrinkage of the dental bed; in addition, the teeth on both sides of the missing area will move or tilt, and the opposing teeth will elongate, thus causing abnormal occlusal relationship and possibly leading to problems of the temporomandibular joint; moreover, tooth loss will lead to reduced chewing function, thus affecting the intake of nutrition and eventually affecting the general health; in addition, tooth loss may also affect pronunciation and In addition, tooth loss may also affect pronunciation and aesthetics, as well as self-confidence decline. In recent years, with the development of materials and technology, there is a kind of restoration method that has the characteristics of both movable and fixed dentures, such as precision attachments, sleeve crowns, etc. In addition, dental implants are a new restoration method. Now briefly introduced as follows: movable dentures: is the use of alveolar bone and remaining natural teeth for support, the production of abutments, rings and dentures, the patient can take off and wear. The removable dentures are not very convenient to use because of the extra brackets and rings, which make them uncomfortable to wear and may affect pronunciation, etc. In addition, they have to be taken off and cleaned after each meal and put on again. The advantage of movable dentures is that any kind of missing teeth can be restored by movable dentures, and easy to repair. Fixed dentures: By grinding down the natural teeth on both sides of the missing teeth, the crown is made on it, and the crown is connected to the artificial denture as a whole, and the crown is bonded to the natural teeth by means of an adhesive, similar to a bridge, so it is called a “fixed bridge” in medicine. The volume of the fixed denture is similar to the volume of the original natural teeth, the patient feels comfortable and does not affect the pronunciation, and the fixed bridge made of porcelain or full porcelain has a beautiful color and realistic shape. The disadvantage is the need to wear both sides of the healthy teeth, in addition to not prevent the resorption and shrinkage of the dental bed. Fixed-active joint restorations: is both fixed and active denture characteristics of a restoration, the most commonly used is the precision attachment and sleeve crown. This type of restoration is more comfortable and aesthetically pleasing than a removable denture, and like fixed dentures there are no clasps, but they still need to be removed and, like fixed bridges, require the grinding of small portions of the natural teeth. Dental Implants: The implants are surgically placed in the alveolar bone with artificial roots, i.e., implants, usually small screws made of pure titanium, which form a good osseointegration with the alveolar bone and remain very firmly in the jawbone. Dental implants have a history of over 50 years of development and are a proven medical technology. Because implants grow in the alveolar bone like natural teeth and look exactly like natural teeth, they are considered to be the closest natural and aesthetically pleasing way to place teeth, and are considered to be the “third set of teeth” after baby teeth and permanent teeth. Whether you are missing a single tooth, multiple teeth or a full mouth, the best way to restore your teeth is with dental implants. The choice of dental implants depends on your oral condition, your requirements and your financial situation. If you only consider the function, comfort and aesthetics of dentures, the order of choice is generally as follows: dental implants → fixed dentures → precision attachments or sleeve crowns → removable dentures. The cost is also basically from high to low. Please discuss the specific restoration plan with your dentist. It is important to note that traditional restorative methods, including fixed dentures, removable dentures and full dentures, do not address the bone resorption of the alveolar bone, which is the biggest problem you will face. Therefore, dental implants should be preferred for any kind of missing teeth, as long as conditions allow.