According to the World Health Organization, the prevalence of periodontal disease is about 40 to 75 percent. In China, the prevalence rate of adults is as high as 70% or more, and is the main cause of loss of function of chewing organs. The prevalence of periodontal disease in the elderly has increased compared to that of adults, and the condition is more serious. Periodontal disease is a persistent, progressive, chronic and destructive disease. Early onset of symptoms are not obvious, not easy to attract the attention of patients. By the time obvious symptoms appear in the hospital, most of the periodontal diseases have already developed into advanced stages, eventually leading to loosening of teeth, loss of teeth, missing teeth and biting disorders until the loss of chewing function. Due to the lack of awareness of the seriousness of the disease, patients are often seen with advanced periodontal disease. The dangers of periodontal disease are not limited to early bleeding gums, loosening and loss of teeth, but have now been shown to cause premature birth in pregnant women. Periodontal disease affects the development of the fetus as much as smoking and drinking. Pregnant women with severe periodontitis have 7.5 times the risk of preterm delivery and low birth weight babies than those with normal periodontal disease, which is already greater than the effect of smoking and drinking on the fetus. Even early gingivitis increases the chance of low birth weight newborns and preterm births. Also, clinical data show that people with periodontitis are 1.5 times more likely to have heart disease and 3 times more likely to have a stroke than the general population. For patients who have already suffered a myocardial infarction, it is important to carry out the necessary dental treatment, especially the treatment of periodontitis and periodontal abscesses, so as to facilitate the treatment and recovery from myocardial infarction. Therefore, the scientists concerned call for the prevention of cardiovascular diseases to start with the prevention of oral diseases. Periodontal disease can also induce diabetes, the bacteria in the mouth through breathing into the lungs, when the body’s immunity is weakened, can lead to pneumonia, aggravate chronic bronchitis and emphysema. Given the importance of oral hygiene to health, the general practice is to require patients to keep their teeth clean, have regular oral health maintenance and examinations by a dental professional every six months, and to quit smoking, among other basic strategies. For patients with severe periodontal disease, it is often accompanied by serious symptoms such as loss of most teeth, loss of masticatory function, and temporomandibular joint disorder. The issue of reconstructing oral occlusal function after complete periodontal treatment is very important to improve the patient’s quality of life. A sleeve crown denture is a combined fixed-active restoration. A sleeve crown is a double-layered crown with a high degree of fit, where the inner crown is cemented to the abutment teeth and the outer crown is placed inside the denture, which is held in place by the frictional force generated by the fit between the inner and outer crowns. The sleeve crown denture has a wide range of application and can be used for all types of tooth loss, especially for most missing teeth and a few remaining teeth (only 1-5 natural teeth left in a single jaw). Compared with the common movable and bracket denture, the sleeve crown denture has less metal exposure, good retention support and stability, can choose the right artificial teeth according to the patient’s face and skin color to obtain a natural and beautiful effect; it is comfortable to wear and easy to take on and off; the sleeve crown denture can also reduce the burden of the few remaining natural teeth, and at the same time has physiological stimulation of periodontal tissue, which is beneficial to the long-term effect of the restoration. Another feature of the sleeve crown denture is that it connects all the abutment teeth (natural teeth) into a whole – “multi-root giant teeth”, so that the denture can obtain good support, retention and stability, and the force can be reasonably distributed during chewing, which has the role of a splint in periodontal disease restoration treatment. The role of splinting. In addition, because the metal inner crown covers the whole abutment teeth, and the inner crown surface is highly polished, plaque is not easy to adhere, so that the periodontal tissue of the abutment teeth maintains good hygiene and prevents the occurrence of gingivitis. Therefore, the socket crown denture is a more ideal restoration method for patients with missing teeth with periodontal disease. Its restorative effect is far better than that of traditional prosthetic restorations or full denture restorations after removal of the residual crown or root. The application of sleeve crowns provides an ideal restoration method for patients who have suffered from missing teeth for a long time and have been poorly restored by traditional restorative methods, meeting the user’s requirements for aesthetics, comfort and function. Its research and application represents an important development direction for prosthetic restoration and will be widely carried out.