1. Make and wear the process
Before wearing porcelain teeth, the dentist needs to grind the tooth to be worn first, take an impression, pour a plaster model, and then make a layer of about 0.3-0.5mm thick metal base on the model, and then bake four layers of porcelain powder on the outside of it at high temperature.
All-porcelain teeth are made by replacing the original metal base of porcelain teeth with a transparent support frame of all-porcelain, and then baking a layer of porcelain powder similar to the natural tooth color on its outer crown surface, and finally bonding to the teeth.
2. Appearance
Because the metal crown of the porcelain tooth is opaque, because the opaque color shielding porcelain needs to be used to cover the metal base, and the transparency of the restoration is not so beautiful, so the porcelain crown will look more obvious chalky, pale and false after restoration.
Since the all-ceramic tooth does not have a metal inner crown, it also has good transparency and refractive properties, so that the neck of the tooth to be pasted can also achieve a good aesthetic effect.
3. The degree of tooth wear
The hardness of porcelain teeth is greater than that of tooth enamel, which will cause wear and tear on the jaw teeth in the long term.
The hardness of all-ceramic teeth is similar to that of tooth enamel and will not cause wear on the jaw teeth in the long run.
4. The degree of gingival black line
The metal components of porcelain teeth will oxidize in the mouth for a long time to form gray oxides, which will be deposited on the gingival edge, often causing the gingival edge to turn gray and affect the appearance.
There is no metal component inside the all-ceramic tooth, so there is no oxidation in the mouth for a long time, and naturally there is no problem of gum blackening that affects the aesthetics.
5. Gum health problems
Some of the metal components contained in porcelain teeth have indeed had cases of severe irritation to the gums, especially in women with allergies. Metal allergy symptoms often manifest as swollen gums, bleeding, and of course, some patients are also allergic to precious metals.
All-ceramic teeth have good biocompatibility, and sensitive cases are rarely found (many celebrities choose all-ceramic teeth for aesthetic reasons).
6. The degree of combination of the inner and outer crowns
Porcelain teeth: The combination of metal and porcelain is the weakest link, and it is common to see porcelain and metal peeling off, revealing gray and black metal.
All-porcelain teeth: The inner and outer crowns are porcelain, and there will be no peeling of porcelain and metal.