The differences, advantages and disadvantages between porcelain teeth and all-ceramic teeth

Porcelain teeth are the most commonly used dental restoration method. Porcelain teeth are divided into many types according to different materials. Among them, all-ceramic teeth are a high-tech dental implant method that has only been developed in recent years. Many people may mistakenly think that all-ceramic teeth are porcelain teeth, and there is no difference between the two. But in fact this is not the case. Today, the editor will take you to understand the difference between all-ceramic teeth and porcelain teeth.

Porcelain teeth are made by grinding the teeth down, taking an impression, pouring a plaster model, and then making a metal base about 0.3-0.5mm thick on the model, and then baking it on the outside at high temperature. layer of porcelain powder.

All-ceramic teeth are similar to porcelain teeth. The metal base is replaced by a layer of all-ceramic transparent supporting frame, and then a layer of porcelain powder similar in color to natural teeth is baked on the outer crown surface. Finally it is bonded to the tooth.

A thin layer of base has six characteristics.

1. The transparent appearance is more like real teeth. This is an effect that is difficult to achieve with ordinary porcelain teeth. Because the metal inner crown of ordinary porcelain teeth is opaque and needs to be covered with a metal base, which affects the transparency of the restoration, making the porcelain teeth have an obvious false sense after cosmetic surgery. There are also "black lines" caused by the metal base that affect the appearance. All-ceramic teeth solve this shortcoming with good transparency, refractive properties and high-strength inner crowns, so that the neck of the tooth can also achieve good aesthetic results.

2. Will not cause wear and tear. Porcelain teeth are harder than tooth enamel and may cause wear on the opposing teeth. The hardness of all-ceramic teeth is similar to that of tooth enamel and will not cause wear to the jaw teeth.

3. There is no "black line" problem on the gums. The metal crowns of ordinary porcelain teeth oxidize in the oral cavity to form gray oxides, which are scattered and deposited on the edges of the gums, causing them to turn gray and affecting their appearance. All-ceramic crowns for all-ceramic teeth do not have this problem.

4. Maintain gum health. The metal of some porcelain teeth can seriously irritate the gums, and some people (especially women) are allergic to it, causing swelling and bleeding of the gums. Some patients are even allergic to precious metals; there are basically no cases of sensitivity found in all-ceramic teeth.

5. Combine the inner and outer crowns. The combination of metal and porcelain is a relatively weak link in porcelain tooth restoration. In this link, it is often seen that the porcelain and metal peel off, exposing gray-black metal. For all-ceramic teeth, the inner and outer crowns are made of porcelain, and the combination of porcelain and porcelain will not fall off.

6. All-ceramic teeth have higher technical requirements for doctors, and the consultation fee is also slightly higher.

In addition, many people have heard that many hospitals require the removal of the metal crown in the mouth during MRI examination, otherwise the examination will not be performed. In fact, metal crowns will have a certain impact on MRI. Gold, platinum alloy, silver, silver amalgam, etc. have minimal impact on MRI; the artifacts produced by pure titanium are also relatively small, and Cobalt-chromium alloy and nickel-chromium alloy have a greater impact on nuclear magnetic resonance, while all-ceramic teeth are non-metal and will not have an impact.

Therefore, when choosing porcelain teeth for oral fixed restoration, it is recommended to give priority to all-ceramic restorations. When metal crowns and bridges have to be used, priority is given to precious metals (gold alloys, gold-platinum alloys, etc.), followed by It is pure titanium metal, and finally cobalt-chromium and nickel-chromium alloy.