Permanent magnets NdFeB based for orthodontic applications

Since 1980s, neodymium-iron-boron (NdFeB) based magnets were used to produce extremely high magnetic flux densities with a smaller size compared to other permanent magnet solutions[1]. The origin of this high efficient behavior is related to the rare earth metals incorporated in those magnets. They give rise to a magnetization along the C-axis[2] (large magnetocrystaline anisotropy) with a significant improvement of the maximum energy product (BHMAX), high coercivity, and a dramatic reduction in the magnet dimensions. This last property makes those permanent magnets very promising for dental applications.