For patients with a single missing tooth, there are 3 types of dentures: 1, removable activity denture: removable activity denture retaining the need for rings (hooks) hanging on both sides of the natural teeth. The disadvantage is that there is a foreign body sensation, need to be repeatedly removed and wear, need to grind a little neighboring teeth; the advantage is that the price is cheap. 2, fixed bridge (porcelain bridge): missing a tooth, you need to prepare both sides of the teeth as the abutment (abutment) bridge to restore the missing teeth, both sides of the teeth to do crowns, connected like a bridge, the middle of the bridge into the shape of the missing teeth. The disadvantage is that the damage to the neighboring teeth on both sides, and even cause the neighboring teeth pulp necrosis, secondary caries, etc., the use of time is about 10 years or so, the long-term success rate is low; the advantage is that the sense of foreign body is not obvious, do not have to take off and wear, the price of 2-3000 to 7-8000 ranging. 3, dental implants: in the alveolar bone of the missing teeth area implanted a special surface treatment of pure titanium implant (root), after 3 months, the implant and the alveolar bone formed between the bone combination, after the root to do a crown. The advantages of this method are that it is comfortable, has no foreign body sensation, does not require removal, and does not require the destruction of natural teeth on both sides, etc. The disadvantage of this method is that it is more expensive. However, the disadvantage is that it is more expensive. Because it does not require grinding of teeth on both sides and regular maintenance after surgery, it has a high success rate and is currently the preferred method of veneering.