Porcelain teeth and all ceramic teeth are ideal restorations. Porcelain teeth are made of metal base with alloy, and then covered with low melting porcelain powder similar to natural teeth. They are sintered and adhered in a vacuum high-temperature porcelain furnace. Therefore, they have the strength of metal and the beauty of porcelain crowns. Its characteristics are that it can restore the morphology and function of teeth, has strong bending resistance, realistic color and appearance, smooth surface, strong wear resistance, no deformation, and stable color. A successful PFM restoration should be realistic in shape and stable in color Acid and alkali resistant, it is a permanent prosthesis.

          All ceramic materials have the advantages of beauty, color close to teeth, good biocompatibility and so on, so all ceramic teeth rarely have gingival discoloration, but their brittleness is large. At present, most of them are limited to anterior tooth restoration.

          The later maintenance of porcelain fused to metal teeth and all ceramic teeth is mainly in two aspects, one is the use habits, the other is the cleaning problem. Pay attention to the following aspects:

          1. Patients with mild discomfort when wearing porcelain fused to metal or all ceramic teeth for the first time should practice patiently and gradually adapt.

          2. You should eat soft food when you first wear it, and then eat normal food after you get used to it.

          3. Porcelain teeth or all ceramic teeth will break under pressure beyond its stress range, so don't bite too hard food, such as walnuts.

          4. In the initial stage, the alignment of the upper and lower tooth tips may change compared with that before repair. Eat slowly and gradually adapt to avoid biting the buccal and lingual mucosa.

         5. Plaque is easy to accumulate at the joint of porcelain fused to metal teeth or all ceramic teeth and abutment teeth, forming dental calculus. Pay attention to keeping your mouth clean and develop the habit of brushing your teeth after meals. Floss can be used between teeth, and go to the hospital regularly for examination and tooth cleaning.

          6. As part of the enamel is removed during tooth preparation, some people will experience cold and hot sensitivity or pain when they first wear porcelain fused to metal or all ceramic teeth, which will slowly ease over time.

          7. When wearing porcelain teeth or all ceramic teeth for the first time, avoid eating cold and overheated food, so as not to cause excitation pain. After about two weeks, you can eat normally.

         Causes of halitosis after restoration of porcelain fused to metal or all ceramic teeth

         Halitosis after porcelain fused to metal teeth or all ceramic teeth surgery is likely to be the taste of food residue and necrotic tooth tissue left in the mouth spoiling and fermenting in saliva, which generally occurs when serious dental caries occur. In order to determine whether this symptom is caused by the unfitness of the edges of porcelain fused to metal crowns or all ceramic teeth, it is necessary to carefully inspect the whole mouth teeth (including the teeth repaired by porcelain fused to metal crowns or all ceramic teeth) clinically, and the diagnosis can be made after excluding caries of other teeth and other factors that may cause halitosis in the mouth; If it is found that the edges of the porcelain fused to metal crown are not close and there is an obvious gap during the examination, it is well known that there is marginal caries. It is recommended to consult with the attending physician to remove the bad restoration and remove the necrotic tooth tissue for restoration.