1, all the teeth have been lost, should use implant restoration or full denture restoration? The conventional method for full mouth tooth loss is traditional full denture restoration, using alveolar bone and mucosal support, atmospheric pressure and saliva adhesion to prevent loss. At present, oral implant technology is becoming more and more mature and widely used, and implant complete denture has become an option, with better retention and support than traditional complete denture, and a higher clinical success rate is guaranteed. However, implant full dentures require higher costs, longer fabrication cycles, and certain requirements for the patient’s oral local conditions and general condition. 2.What are the negative consequences of long term missing teeth? Tooth loss is a potential pathological condition that has a significant impact on the patient’s facial changes and chewing function. With the passage of time, it then causes alveolar ridge resorption, oral mucosa flattening and thinning, masticatory muscle tension and elasticity decreases, resulting in harmful changes such as TMJ disorder and pain, tongue enlargement, etc. It also affects the patient’s social life and has a great impact on the patient’s psychological factors. Therefore, full-mouth tooth loss should be restored early. 3.Is it better to extract only one or two teeth left in the whole mouth and set a full denture? The remaining teeth are very helpful to prevent the shrinkage of the dental bed and to provide retention and support for the denture. Therefore, if the remaining teeth have good roots and are not extensively damaged, and if they are useful for veneering, they should be retained. If the remaining teeth are not in good condition, but after treatment they improve and can provide some retention and support, they should also be retained. If the teeth are severely skewed and loose, with a large area of loss, they should be extracted if the doctor determines that they have no retention value after examination. 4.What should I do if I wear a full denture and chew weakly? The first possible reason is that the occlusal surface of the denture is not ideal, the contact area between the upper and lower teeth is too small, and the chewing area is reduced resulting in lower chewing efficiency; the second possible reason is that the height of the upper and lower teeth restored by the denture is small, which is beyond the optimal range of action of the chewing muscles resulting in low chewing efficiency. If the above two conditions lead to chewing powerlessness, the denture should be rebuilt. 5.What should I pay attention to when I first start to wear a full denture? When wearing a full denture for the first time, you should first build up your confidence in using the denture and try to wear it in your mouth to practice using it. When you first wear the denture, you will have a foreign body sensation, even if you can’t swallow saliva, nausea and vomiting, unclear pronunciation, etc. You should be prepared for these phenomena before wearing the denture. In the first few days of wearing the denture, you should practice wearing the denture to do orthodontic occlusion and pronunciation. After you get used to it, then chew food with the denture. Start eating small pieces of soft food first, chew slowly, chew food with both sides of the back teeth, and then gradually eat general food after a period of exercise. In addition, the denture should be removed after meals, rinsed with cold water or brushed with a toothbrush and then put on, so as to avoid the accumulation of food residues in the tissue surface of the denture, stimulating the oral mucosa and affecting the health of the tissue. You should also brush the palatal side and lingual surface with a soft brush. The denture should be taken off at bedtime and soaked in cold water so that the tissue of the edentulous jaw-bearing area can get proper rest, which is beneficial to the tissue health. The denture should be thoroughly brushed and cleaned with toothpaste at least once a day, preferably after each meal. Special care should be taken when brushing to avoid dropping it on the ground and breaking it. 6.How to solve the problem of unclear pronunciation when wearing a full denture? When you first wear a denture, especially a full denture, the range of tongue movement is restricted, so you may have a temporary pronunciation problem. If the denture is not well fixed, the abutment is too thick, too large, or the position of the teeth of the denture is biased towards the tongue, the impact on pronunciation is more obvious. These problems should be modified in time. What is more important is to rely on the patients themselves to gradually adapt, adjust, exercise, and consciously practice the often unintelligible sounds, most of them can quickly restore the normal pronunciation function. The solution to the articulation disorder method depends on its cause. If it is because the palatal surface of the abutment is too smooth and the lingual surface of the anterior teeth is too smooth, the anterior part of the maxillary abutment can be formed into the form of palatal folds and incisal papillae. If the abutment is too thick can be properly ground thin. 7.What should I do if my complete denture falls out when I open my mouth to talk or yawn? Full denture is easy to fall off when talking or yawning. This is caused by the edge of the abutment being too long or too thick, insufficient cushioning of the edge of the abutment in the labial, buccal and lingual ties, which affects the activities of the surrounding muscles, or the bad shape of the polished surface of the denture. In this case, we should use symptomatic methods such as grinding and changing the edge of the abutment that is too long or too thick, buffering the abutment in the ligament area, forming the shape of the abutment polished surface as it should be, or appropriately grinding away part of the buccolingual surface of the artificial teeth to reduce the width of the artificial teeth. 8.What if the complete denture is easily dislocated when eating? When chewing food, the denture is easily dislocated, which is caused by interference with the tip of the teeth and imbalance of the bite, causing the denture to buckle and destroy the edge closure. In the mandibular molar posterior cushion area, the thick base is in contact with or close to the base of the posterior edge of the maxillary tubercle, which can also cause poor retention during chewing. In addition, the maxillary dentition plane is low, and when the mandible is extended forward, the posterior edge of the maxillary and mandibular abutments are in contact, which can cause the anterior portion of the mandibular denture to buckle and dislocate. In this case, the teeth should be selected and adjusted to eliminate premature contact and cusp interference, or the edge of the abutment should be ground short or thin. 9.Why does nausea occur when wearing a full denture? The common reason is that the posterior edge of the maxillary denture is too long and the posterior edge of the abutment does not fit well with the oral mucosa, or it irritates the mucosa and causes nausea. When the lower jaw is stretched forward, the upper and lower front teeth are in contact but the posterior teeth are not in contact with the buccal cusps, and the posterior end of the denture is cocked and irritates the mucosa, causing discomfort to the patient. The posterior margin of the maxillary denture is too thick, and the lingual side of the mandibular distal denture is too thick, and the extension is too long to squeeze the tongue and cause nausea. Menopausal patients are also prone to nausea and vomiting. For the abutment is not suitable is mainly grinding change too long and thick abutment, maxillary abutment posterior margin area relining to make it fit. 10, wear a full denture bite lip and cheek muscles or bite tongue how? First, because the mouth is not yet adapted to the denture, can not be applied freely. Secondly, the artificial teeth are arranged too much to the buccal or lingual side, the maxillary and mandibular teeth overlap or anti-closing relationship is small, such as the tip of the tip of the opposite, or the tip of the real teeth are too sharp. The former should insist on wearing it to make it adapt gradually, while the latter needs to return to the clinic for modification. 11.Why do I need to be seen again and again after wearing a full denture? After wearing a full denture for the first time or for a period of time, problems or symptoms may occur due to various reasons, so timely modifications should be made in order to protect the health of oral tissues and restore the function. Oral soft tissues are elastic, and after the denture is worn, the phenomenon of sinking occurs due to the combined force, and mucosal rupture and pain are likely to occur in the bone tip, bone ribs, and bone protrusions. Sometimes the patient is very tolerant and still insists on wearing the denture, which can cause more damage. Therefore, after wearing the full denture, should be regularly reviewed, in order to timely detection of problems, timely treatment. 12.Can I repair a damaged full denture? Full dentures are often broken due to inadvertent falling on the ground, or fracture due to unbalanced force after long-term use due to changes in the oral environment, but they can usually continue to be used after intraoral adjustment. However, for a full denture that has been used for too long causing severe wear of the artificial teeth, or a denture with severe poor retention, it is usually necessary to recreate it. 13.How many years will a full denture last? The life span of a full denture varies with each person’s oral condition and usage method. Generally speaking, after 5 years of use, it is time to relining or re-fabrication. Because with age, the dental bed will continue to shrink, soft tissues will also have corresponding changes, resulting in the denture and the dental bed of the contact to reduce the fit, wear will appear loose, unstable situation. Long-term chewing of food will cause the dentures to wear out, resulting in low chewing efficiency. When the above situation occurs, the denture should be replaced in time.