2024-06-11
Due to the different materials, the cast porcelain teeth and the porcelain fused to metal teeth are fundamentally different, and the following excellent performances appear:
1. Transparency: This is an impossible task for PFM. Because the metal inner crown is opaque, it is necessary to cover the metal base with opaque porcelain, which will affect the transparency of the restoration, making the PFM have obvious chalky, pale and false color after beauty, and the "black line" caused by the metal base in the tooth neck will affect the beauty. The cast porcelain solves this cosmetic problem with good transparency and refraction and high-strength inner crown, so that the tooth neck can also achieve a good aesthetic effect. 2. Gum health: nickel chromium metal, also known as base metal, has serious irritation to the gum. Some people (especially women) are allergic to it, causing gum swelling and bleeding, and even some patients are allergic to precious metals; No sensitive cases were found in cast porcelain.
3. Gum discoloration: the base metal oxidizes in the mouth to form gray oxide, which is scattered and deposited on the gum edge, causing the gum to become gray and affecting the appearance; Cast porcelain has no such problem.
4. Combination of internal and external crowns: the combination of metal and porcelain is a weak link. It can often be seen that porcelain and metal are peeled off and gray black metal is exposed. Because the inner and outer crowns are porcelain, the combination of porcelain and porcelain is definitely the best.
5. The hardness of porcelain fused to metal crown is higher than that of enamel, which can cause the abrasion of jaw teeth. The hardness of IPS Empress porcelain is similar to that of enamel, and it is worn synchronously with the opposite teeth.
6. There is no metal interference and it has no influence on the possible CT and nuclear magnetic examination in the future.
7. There will be no abnormal blue under the light of special occasions (disco, dinner, etc.).
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