70年代后期,有学者率先将磁力引进正畸学领域,使牙移动获得成功。从此,对磁力矫正牙齿的临床应用及基础研究,成了80年代正畸界的研究方向之一。 常用磁性材料 在稀土材料被应用之前,常用的永磁材料主要有铁氧体(Ferrite)和铝镍钴(AlNiCo)两大类。这两类材料磁力小,需加大体积才能增加磁力,用于口腔受到限制。Po—Co永磁体磁能积较高,耐腐蚀性 In the late 1970s, some scholars took the lead in introducing magnetic force into orthodontics and succeeded in moving their teeth. Since then, clinical application of magnetic force correction and basic research has become one of the research directions of orthodontics in the 1980s. Commonly used magnetic materials Before the rare earth materials are applied, the commonly used permanent magnetic materials mainly include ferrite and AlNiCo. These two types of material magnetic force is small, need to increase the volume to increase the magnetic force, used for oral restriction. Po-Co permanent magnet high energy product, corrosion resistance