Complete tooth loss, the conventional method is the traditional complete denture restoration, the use of alveolar bone and mucous membrane support, atmospheric pressure and the adhesion of saliva to prevent falling off. At present, the oral implant technology is becoming more and more mature and widely used. Complete dentures have also become an option, with better retention and support than traditional complete dentures, and a high clinical success rate has been guaranteed. However, the implantation of complete dentures requires higher costs and a longer production cycle, and also has certain requirements on the patient's oral local conditions and systemic conditions.

Dentition loss has a significant impact on the patient's facial changes and masticatory function, and is a potential pathological state. Over time, it will lead to the absorption of the alveolar ridge, the flattening and thinning of the oral mucosa, the decrease in the tension and elasticity of the masticatory muscles, resulting in the disorder and pain of the temporomandibular joint, and the enlargement of the tongue and other harmful changes. Psychological factors have a huge impact. Therefore, the complete loss of dentition should be repaired as soon as possible.

Remaining teeth are of great help in preventing gum recession and providing retention and support for dentures. Therefore, if the base of the remaining tooth is intact, there is no large-scale defect in the shape, and it is helpful for the denture, it will be retained. If the remaining tooth is not in good condition, but it improves after treatment and can provide some retention and support, it should also be retained. If the tooth is severely deviated and loosened, and there is a large area of defect, it should be extracted if it is determined by a doctor that there is no preserved value.

The first possible reason is that the occlusal surface shape of the dentures is not ideal, the contact area of the upper and lower teeth is too small, and the reduction of the chewing area causes the reduction of the chewing efficiency; the second possible reason is that the height of the upper and lower teeth restored by the dentures is too small, exceeding the Inefficient chewing caused by the optimal range of action of the masticatory muscles. If the above two conditions cause inability to chew, the denture should be remade.

       When wearing a complete denture for the first time, you must first build up the confidence in using the denture, and try to practice using the denture in your mouth. When wearing dentures for the first time, there will be a foreign body sensation, even inability to swallow saliva, nausea and vomiting, and unclear pronunciation. These must be mentally prepared before wearing them; secondly, correct the protruding or lateral mandible caused by long-term missing teeth Chewing habits; with regard to eating problems, it is not advisable to wear dentures to chew food too early. A few days before the first wearing, you should practice wearing dentures to do median bite and pronunciation. After you get used to it, use your dentures to chew food. Start to eat small pieces of soft food first. The chewing action should be slow. Use the back teeth on both sides to chew food. After a period of exercise, gradually eat normal food. In addition, dentures should be removed after meals, rinsed with cold water or brushed with a toothbrush before putting them on, so as to prevent food residues from accumulating on the tissue surface of the dentures, irritating the oral mucosa and affecting tissue health. Also apply a soft brush to the upper palate and lingual face. When sleeping, the dentures should be removed and soaked in cold water, so that the tissues in the edentulous jaw support area can get a proper rest, which is beneficial to the health of the tissues. Dentures should be brushed thoroughly with toothpaste at least once a day, preferably after every meal. Special care should be taken when brushing, so as not to fall on the ground and break.