1, always the most important one: the doctor’s skills and mentality Many friends often ignore this, focus on the hospital or clinic’s size, grade, equipment and porcelain dental materials used, often only care about the kind of porcelain teeth they do, with or without nickel, the consideration of the physician’s skills are relatively small. The doctor’s skill is always in the first place. High-skilled doctors, in order to produce high-quality porcelain teeth. Without good technology, the best materials can not produce good results, it is like the same raw materials, high skill chef cooked dishes are delicious, poor skills cooked dishes may be difficult to swallow. Have good skills, but also need to have a good mentality, only good skills, no responsible mentality. The quick success, too much attention to the economic benefits, not practical for the actual needs of patients and economic considerations, the design of porcelain teeth does not meet the actual situation of the patient, or even beyond the porcelain dental evidence of the design. Such porcelain teeth will not last long. 2, porcelain dental materials used good materials have good physical and chemical properties and stability, we call biocompatibility. Porcelain teeth and the inner layer of the metal and oral hard and soft tissue in close contact, the performance of the good or bad, directly affect the physiological health of the oral cavity. Good biocompatible metal can “live peacefully” with the hard and soft tissues of the oral cavity, harmonize with the body, and become part of the oral environment. Poor biocompatible metals can cause adverse stimulation to the surrounding tissues, resulting in allergy, corrosion, metal ion leakage and other phenomena, resulting in gingivitis, periodontitis, gingival margin black line, oral odor, etc. Good materials, especially gold, have good ductility, so gold porcelain teeth fit better, and if the crown and teeth do not fit, it will lead to restoration of tooth decay (worm teeth) and other adverse reactions, which will affect the life of porcelain teeth. 3, the production of porcelain teeth is good quality, whether there is a good fit The first criterion to judge the quality of porcelain teeth is to see how its fit. Porcelain teeth, set on the real teeth, so there will be a gap between the real teeth. Porcelain teeth are fixed on the polished teeth through the bonding agent, the gap between the porcelain teeth and real teeth rely on the bonding agent to seal, therefore, the closer the porcelain teeth and real teeth, the smaller the gap between the two, the more conducive to the protection of natural teeth. The larger the gap between the two, or the bonding agent is not of high quality, it will lead to germs entering the gap to cause corrosion of the natural teeth, forming cavities, and the real teeth inside are bad, the porcelain teeth will become a wood without a foundation. You can see how critical the impact of the closeness on the life of porcelain teeth. Some dentists often induce patients “as long as you do not lose the real teeth inside, porcelain teeth will not fall”, this is to steal the concept, they escape such a problem “if you do not pass the porcelain teeth, the real teeth inside will only be bad faster. Long-lasting porcelain teeth must have a good fit. Low production standards of porcelain teeth poor precision, poor fit, large gaps. 4, whether the design is reasonable porcelain teeth if the design is unreasonable, it is possible that because of excessive force denture fracture, chipped porcelain, loose real teeth and other phenomena, thus affecting the life of porcelain teeth. How can there be unreasonable design of porcelain teeth, a situation is the doctor’s level is not enough, a situation is the doctor knows that the design is not reasonable but still forced to do, should do 3-5 full mouth are done, can not do the forced to do. The first case is still excusable, but the heartbreaking thing is: the second case often accounts for most. 5, whether to pay attention to maintenance in the process of using anything should be used according to the instructions, some friends use the teeth to open the wine bottle, broken teeth after looking for me to set porcelain teeth, I hope to spend everyone’s money set of teeth can be used for life. I think, if used to open a bottle of wine, porcelain teeth will not be longer than the real teeth with it.