From partial loss of a tooth to extraction of a whole tooth and finally to complete loss of all teeth, all are indications for denture restoration. Patients want their dentures to be aesthetically pleasing and functional, but a successful denture requires not only the skill of the practitioner, but also the cooperation of the patient in post-visit review and denture maintenance. Unfortunately, many patients do not know how to use and maintain their dentures. As a prosthodontist, I have always wanted to write something for my patients to tell them how to use and maintain their dentures so as to achieve satisfactory restorative results and prolong the life of their dentures. We would like to take the opportunity of 9.20 Dental Care Day to talk about how patients should use and maintain their dentures. 1, anterior single crown, crown bridge, veneer restoration anterior area of the single crown, crown bridge, veneer restoration, to exercise the aesthetic function is the main, and the occlusal function is complementary. The crown restorations in the anterior region are required to add baking decorative porcelain on top of the inner crown for aesthetic purposes, and the veneers are 1mm thick porcelain veneers with limited strength, which cannot withstand the large occlusal force. Therefore, in daily use, these dentures should not be used to bite hard objects. To brush carefully, learn to use dental floss, and try not to use toothpicks. There are errors in the process of mold taking and denture fabrication, which cannot be avoided by current technology. Even a well-made denture is not a perfect fit. There is a small gap between the denture and the root of the tooth, and this gap tends to accumulate food residue. This requires the patient to brush the teeth carefully and remove these debris in time, otherwise decay will occur in the gap area, which will eventually lead to denture loss. Flossing can better clean the food debris between the two teeth and does not cause gum recession, which is better than toothpicks. Regular review, the denture will be checked by the physician for any damage and reasonable guidance for use. 2. Single crown and crown and bridge restoration in the posterior region The function of the posterior teeth is mainly to chew food. Therefore, the denture in the posterior region pays more attention to sufficient strength to prevent the crown and bridge from splitting due to biting during chewing. However, it is important to note that although crown and bridge restorations for posterior teeth are strong enough and generally will not split, this does not mean that they can be eaten without fear. This is because excessive occlusal forces can be transmitted through the crown to the root of the tooth below the crown, causing the root to fracture. Clean carefully, review regularly, follow medical advice and eat reasonably. 3.Partial removable denture The removable denture can be widely used for the restoration of anterior and posterior teeth, single and multiple missing teeth. The gap between the denture and the teeth and gums is poor, and sometimes very large. The toothbrush should be taken off before going to bed at night and soaked in tap water or special disinfectant water after cleaning. It is strictly forbidden to place it in a dry environment and soak it in hot water, which will easily cause tooth aging and deformation. The side of the denture abutment that fits the gum is uneven and matches the bump of the gum surface, but it is more likely to retain food residue, and it is not easy to clean, so it needs to be carefully brushed. A denture that is not cleaned for a long time or is poorly cleaned will cause redness and inflammation of the gingival mucosa under the abutment, which is called denture stomatitis. It is normal for the movable denture to have slight movement when chewing, and even to fall off when eating sticky food; the ring will be fatigued after wearing for a long time and the retaining force of the ring is not enough, resulting in loosening of the denture, so it is necessary to contact with the doctor and adjust the retaining ring force in time, and private modification is strictly prohibited, which will easily lead to the fracture of the ring. If the number of missing teeth is small, such as 1-2 teeth, the corresponding denture size is small, so you need to pay extra attention to avoid accidental swallowing and swallowing when eating, and make sure to take off the denture during naps and late nights. After the first time to wear the movable denture, there may be local pressure pain, should promptly contact with the doctor to adjust. 4.Full denture After all the teeth are missing in the mouth, a full denture is needed, divided into single jaw full mouth and double jaw full mouth. The full denture relies on the adsorption force between the denture and the gum tissue and the holding force of the peri-oral muscles on the denture. This requires that the edges of the full denture fit tightly into the gingival tissue in order to ensure retention. With a newly restored complete denture, the patient needs an adaptation period to learn how to better utilize the perioral and lingual muscles to assist in the retention of the denture. In general, the retention force of a complete denture is positively correlated with the size of the jawbone, therefore, patients with heavy jawbone resorption are prone to loosening and loss of the denture. If the upper jaw is larger, the retention of the full denture is generally better; if the lower jaw is only half the size of the upper jaw, the retention is generally worse, which patients should understand and accept. After tooth loss, the jawbone will continue to resorb, so the complete denture will not fit well with the gingival mucosa after 6-8 years of use and should be replaced in time. After the first time to wear the movable denture, there may be local pressure pain, you should contact with the doctor in time to adjust the change. 5. Implant denture Implant denture restoration has its own special characteristics, patients need to pay more attention to post-visit review and maintenance. Pay more attention to denture cleaning. The residual food residue can lead to redness and swelling of the gums around the implant, which can cause peri-implantitis over time. This can lead to loosening of the implant and implant failure. Do not eat excessively hard food. Excessive biting forces can lead to excessive implant loading, peri-implant bone resorption, implant loosening and implant failure. A successful denture requires not only the conscientiousness and skill of the practitioner, but also the patient’s adherence to medical advice and careful maintenance. A healthy life starts from loving your teeth.