Currently, there are four types of bracket-type removable dentures commonly used in clinical practice: cobalt-chromium brackets, titanium brackets, Vitagreen brackets and pure titanium brackets. All along, the bracket type movable denture has been mainly cobalt chromium bracket, but due to the limitation of the material performance and to ensure sufficient strength, it is often heavier or corroded; Pure titanium bracket is composed of pure titanium. Pure titanium stents are composed of pure titanium, which is non-toxic, highly pure, and has excellent biophilic compatibility with the human body. Light specific gravity, 4 times lighter than gold. Low thermal conductivity, no metallic odor, non-magnetic, strong elasticity, high physical strength, comfortable taste. No obstruction to X-ray. High corrosion resistance. In the medical field, titanium has become an indispensable material for dental implants. Pure titanium scaffolds are lighter and biocompatible, but prone to casting incompleteness, poor fatigue strength, easy to oxidize and other shortcomings. Vitalin stent is Co-Cr-Cr-Mo-Mo alloy, the main component is Co63%-Cr29%-Mo6%, containing 0.25% carbon. Its corrosion resistance and mechanical wear resistance are very strong. The role of chromium and molybdenum in the alloy is to improve the strength and corrosion resistance; molybdenum can also prevent the crystallization of the metal grain size, so that the structure is tight, thus improving the fatigue resistance of the metal. Solve the shortcomings of pure titanium stent easy to oxidize. Vitagreen stent in 730 ° C – 1100 ° C between high temperature, but still can maintain its high mechanical strength, a high degree of resistance to thermal corrosion, a high degree of antioxidant capacity. It has been commonly used as artificial joint material for many years, and clinical data show that the biocompatibility is very good. Biocompatibility: no allergic reactions Beryllium (Beryllium) and Nickel (Nickel) free. Good ductility: adjustability close to that of precious metals (fine tuning). Suitable surface hardness: resistant to cracking and abrasion. Maximum advantage: good elasticity: closer fit, smooth insertion. The elasticity of this material is incomparable to any existing stent metal. Due to the good elasticity of this stent, the thinner snap ring and thinner palatal plate, together with the properties of the material itself, the weight of the stent is greatly reduced and comfort is greatly improved. The Vitalin stent solves the problem of the high weight of the cobalt chromium stent and the poor comfort of the pure titanium stent. Its mass is slightly heavier than pure titanium stents and its thickness is the thinnest of the three. Vitalin stent’s alloy purity is high, more anti-bacterial spots, anti-coloring, easy to clean, with gold alloy characteristics, high resistance to thermal corrosion function, oxidation function, fatigue resistance, biocompatibility is very good, summed up with the following characteristics: 1, cobalt and t alloy of the highest grade of the physical characteristics of the achievement of its excellent precision 2, does not contain nickel and beryllium, the human body does not have any allergic reaction 3, no metal odor, unprecedented No metal odor, unprecedented fracture resistance, convenient and lighter 4, exquisite partial denture has a better appearance and more comfortable practical performance 5, highly polished surface makes denture easier to clean and maintain the luster, resistance to the formation of plaque 6, on the neighboring teeth and restorations with less wear and tear Pure titanium bracket Vitalean bracket