Magnetic retainer used for tooth

The utility model belongs to the technical fields of oral medicine repair and medical instruments, in particular to a magnetic retainer used for a tooth, which solves the problems that potential hazards exist in the prior art, retainer assemblies have low bonding strength and are easy to drop and the like. A T-shaped cup-shaped magnet yoke is made of nickel-free anti-corrosion ferrite soft magnetic stainless steel, and a rare earth neodymium iron boron permanent magnet is arranged in the magnet yoke and is tightly stuck to the bottom at the concave point of the magnet yoke; and a high-nitrogen nickel-free austenitic nonmagnetic stainless steel circular slice is embedded into the T-shaped cup-shaped magnet yoke, is tightly stuck to the other side of the magnet and forms a plane with the opening end surface of the magnet yoke, and a circumferential seam is sealed by microcell laser welding. The T-shaped cup-shaped magnet yoke wrapping the permanent magnet and a nickel-free anti-corrosion ferrite soft magnetic s