Dental implant is a new technology of dental veneer that has been gradually developed in China in the last decade or so. It is a high technology of modern medicine that has created a third set of teeth for human beings and is welcomed. Dental implants are composed of an implant located in the jawbone and an open part that is pierced and exposed to the gums. The implant is the unique structure of the implant denture, acting as an artificial root and an artificial attachment device, the latter being the abutment, the abutment and the artificial denture part attached to it, which plays a functional and connecting role. The implant is surgically inserted into the jawbone like a crop, and after 3 to 6 months the implant is firmly bonded to the jawbone and the denture is attached to the upper end of the implant to become a dental implant. The implant is usually placed 3 to 6 months after the extraction of the tooth. Immediate implant surgery is performed immediately after the extraction and the restoration (porcelain teeth, etc.) is done on the artificial root 6 months after the surgery. When a patient wearing an implant denture is exercising chewing functions, the dental forces are transmitted directly through the implant into or on the jawbone, and the forces are quickly transmitted and dispersed into the larger supporting bone, thus being able to withstand larger dental forces and having good support. The advantages of dental implants: Dental implants are internationally considered to be the preferred means of restoration for missing teeth and are the ideal choice for those with missing teeth. The reason why dental implants can be the best among various restorative methods and the closest choice to natural teeth is because they have many outstanding advantages compared to traditional dentures: 1. The traditional porcelain bridge requires grinding down the healthy teeth on both sides of the missing tooth, which may lead to tooth sensitivity. 2, stable and reliable: the implant (i.e. artificial root) and the alveolar bone grow together through osseointegration, very strong, similar to the natural root of human teeth. 3, in line with human physiology and biomechanics: natural teeth will be chewing pressure in the mouth through the root to the alveolar bone, while dental implants will be chewing pressure through the artificial root (implant) to the alveolar bone, the same biomechanical principle, so it can withstand strong chewing force, chewing efficiency than the traditional dentures have a substantial increase; while the traditional porcelain bridge is through the retention body paste on the neighboring teeth, increasing the burden on the neighboring teeth and affect the The use of years. 4. Comfortable: Because of the small size and small or no abutment, there is no foreign body feeling in the mouth, which makes you forget about the existence of dentures. 5. Slow down the resorption of alveolar bone. 6. For cases where the alveolar ridge is significantly resorbed and it is difficult to succeed with traditional dentures, implant denture has its significant superiority. Contraindications to dental implants The ability or condition to undergo this procedure is mainly related to the patient’s general condition and local conditions. Chronic wasting diseases, such as tuberculosis, diabetes, hematological diseases; hypertension, heart diseases, cerebrovascular diseases; mental illness, psychological instability; drug addiction, alcoholism, severe mental weakness, poor physical condition; all the above mentioned disorders are contraindications to implant surgery. However, there are relative contraindications and absolute contraindications. For patients with reversible diseases, dental implant surgery and restoration can still be performed after they are controlled or cured through treatment. Certain local conditions such as oral gingivitis, periodontitis, untreated benign and malignant tumors in the oral cavity, abnormal occlusion and malocclusion, and restricted mouth opening can affect the success rate of dental implant surgery. If the bone volume is insufficient due to the severe resorption and atrophy of the alveolar bone, the implant may penetrate into the maxillary sinus in the upper jaw and into the mandibular canal in the lower jaw during implantation, which is not suitable for direct implantation. In addition, it is also contraindicated for people with severe grinding habits and poor oral hygiene. Dental implant maintenance and review In developed countries, the 5-year utilization rate of dental implants is over 90% and the 10-year utilization rate is about 85%. The success of the dental implant procedure and the number of years of use are related to many factors. The choice of the implant system has a greater impact on the fixed role of the root. The ITI implant system chosen by our department is the most widely used implant system internationally today, and the high quality of the product guarantees the service life; secondly, it is related to the technical operation, oral inflammation of the patient, poor oral hygiene and imperfect maintenance. Dental implants have a similar dental and periodontal relationship to natural teeth, and it is necessary to perform special implant cleaning around the implant and routine cleaning of the surrounding natural teeth, so as to maintain the long-term stability of the implant. In order to maintain the normal function of the oral and jaw system, it is required that the dental implants should be coordinated with the natural teeth in the oral cavity. However, the wear rate of the dental implants and the natural teeth is different, and the dental implants are more wear-resistant than the natural teeth, and over time it will appear that the dental implants are relatively higher than the surrounding natural teeth, and when chewing, the dental implants contact first and often cause occlusal trauma due to overload. Dental implants are periodically adjusted to adapt to the changing (dental) relationship. Dental implants are made up of several parts like natural teeth, but the parts of natural teeth are organically bonded together, while dental implants are connected by screws or bonding agents. Periodically check the parts of dental implants for any problems so that they can be repaired in time. In the first year, the patient should be re-examined at 1 week, 1 month, 3 months, 6 months and 1 year after the restoration, and every 6 months thereafter, and at least 1 x-ray should be taken every 6 months, preferably at every re-examination. Patients themselves should do a good job of self oral hygiene care, master the correct method of brushing, recommend soft-bristled toothbrush and high-grade micro-abrasive toothpaste; flossing is a method of removing plaque from the adjacent surfaces of teeth, especially for the interdental space where the interdental papillae do not recede significantly.