A. When the teeth are missing dental restoration is divided into two categories: 1, movable dentures. 2, fixed dentures. The fixed dentures are divided into: 1, fixed bridge repair (when a tooth is lost, the two sides of the teeth connected to make a bridge); 2, dental implants: without grinding both sides of the teeth, directly screwed in the alveolar bone a screw, to be screwed and bone bonding, and then do a crown on top, OK. use is also the most efficient of all the repair, chewing, the most comfortable, and no damage to adjacent teeth. The following is my single talk about dental implants: modern oral implantology is rapidly developing and perfecting. Domestic reports in recent years show that standardized oral implant treatment can achieve a success rate or retention rate of more than 95 percent for 10 years. Implants are mainly made of pure titanium, threaded columnar and root-shaped implants have become a widely accepted form of implants worldwide. The moderately rough structure of the surface can also increase the surface area of the implant and promote osseointegration. The process of dental implantation: 1. take the model, take x-rays; 2. develop the implant plan; 3. choose the implant type and category; 4. arrange the implantation time; 5. administer anesthetic (the whole process is carried out under painless and minimally invasive operation), intra-oral. 6. prepare the instruments; 7. position – prepare the cavity – measure the length – take pictures – screw in the implant – close the screw to close the upper part of the implant – finish (the whole implantation time of each tooth is about 15 to 30 minutes); 8. arrange the follow-up time according to the situation in the mouth; 9. generally, about three months after the implant is placed, you can do the second stage of restoration (that is, to do braces), if the bone powder is implanted, you have to wait a little longer. The longer the time, the stronger the implant will be. Some people with missing teeth are afraid of dental implants and are afraid of pain.