Porcelain restorations are made by fusing ceramic powder to a specially treated metal surface under vacuum conditions and with the help of high temperatures. Its aesthetics, biocompatibility is other restorations can not be replaced, is by far the most ideal restoration. The advantages of porcelain teeth: 1, good edge closure: Some patients may have eaten such suffering: a not so good or missing some teeth, through the steel teeth, gold teeth wrapped up after about ten years, feel smelly or pain, it is because the denture crown and the real teeth are not close enough, saliva and food residue will seep into it, the real teeth will gradually erode, thus appearing denture smelly, loose and fall off, which is the denture edge closure The result of bad edge closure. Porcelain dental production requires edge fit, 1mm below the gingiva, plus a special non-water-soluble bonding material, to ensure that the edge of the seal. 2, aesthetic: color adjustable into the same color as the real teeth, permanent non-discoloration, all-porcelain color is more ideal, refractive properties are consistent with the real teeth, (titanium, gold, white gold). 3, good biocompatibility: especially biological precious metals made of porcelain and all-porcelain teeth, because of its electrical chemical inertia and corrosion resistance, tissue allergy-free, and ordinary stainless steel porcelain teeth, wear a period of time, the gingival margin is visible a dark gray edge. 4, very high strength: gold will and ceramic powder fused together at high temperatures, enough to withstand the chewing force in the mouth, precious metals and ceramic teeth bonding force is more powerful. 5, to protect the hard tissues and pulp: because the teeth need to do porcelain teeth are often discolored decay more teeth, porcelain crowns are completed, the entire real tooth is surrounded by gold in the middle, the force of chewing on the crown, will not fracture or crumble, and bonding porcelain crown bond and porcelain layer, there is good insulation, to prevent the external stimuli on the pulp of the injury.