How difficult it is to train a doctor, read a decade or eight years, need to not only master the theoretical basis, but also have practical experience, in order to deal with general problems normally, if you want to solve a difficult problem, without a few years of clinical experience is not. Root canals and fillings do have a lot of difficulties. There is no way to fully explain the complexity of some of the technical points of root canal treatment, but it does require the quality of the doctor's labor. But nowadays, both from the point of view of public opinion and from the actual charges for labor skills, it shows disrespect for labor and knowledge Secondly, you only see a little bit of the materials used for fillings, you don't see the molding tablets, the wedges, the adhesives, the brushes, the cushioning materials, the sodium hypochlorite, the light-curing lamps, the wear and tear of the lathe needles, the depreciation of the nickel-titanium expanding filing needles, the ultrasonic swabbing, the filling pastes, the sealing medicines for the canals, the depreciation of the handpiece, and the sterilization and so on and so forth. The cost of the filling is the cost of depreciation and sterilization. And account for the bulk of the material is the filling resin, this material is really more expensive, because of the physical and chemical properties of the material is very high, can be exposed to the oral cavity to withstand hot and cold, acid and sweet, corrosion resistance, wear resistance, good adhesion with the dental tissues and so on and so on and so on and so on and so on and so on and so on and so on and so on. Finally, the oral cavity as part of the human body, but also as an important part of the quality of life and happiness index (three meals a day, good teeth and good appetite is definitely not blowing; teeth also show a part of the face; ......), is definitely worth charging a very high fee. What's more, when disease arises, it can't return to its original state, and no restoration can be the same as before. The reality is that many people don't go to the hospital until they feel a toothache, and by the time they get there it's so bad that it's hard enough to fix it until it's ready to go. The best thing to do is to focus on prevention and regular checkups to nip the disease in the bud, which costs the least, and the cost of fossa sealing and prophylactic filling is far lower than root canal treatment. But sadly, ironically, many people feel that they are spending too much money on dental visits not because they are not properly protected and prevented, but because they complain about the high hospital fees and still feel that it is not worth it. What can make you improve any happiness index, whether it is food, travel, health care and other aspects, are worth a very high fee.