覆盖义齿已在临床上广泛应用。经过长期的临床观察,证实这种义齿能取得良好的治疗效果。但目前所使用的覆盖义齿,为增进其稳定性,而使用了许多附件和固位设计,如Dalbo氏附着体,Baku clip附着体,B-D氏附着体等。这需要进行特殊设计和采用附件,以及熟练的临床和制作技术。同时这些附件常遭到损坏,在使用中常需作调整,甚至替换。与这些附件及固位设计比较,磁铁固位的覆盖义齿更具优点,方便易行。尤其是在增进义齿固位方面,为覆盖义齿开辟了新的途径。现将有关磁铁固位的资料作一回顾。磁铁的种类一、钴铂合金磁铁早在1953年,Behrman等已将磁铁种植于下颌骨中以增加义齿的固位。此后Behrman又对磁铁种植技术及组织反应等问题进行了大量研究。他将钴-铂合金磁铁用特氟纶包绕种植于无牙患者的颌骨中,并 Overdenture has been widely used in clinical practice. After long-term clinical observation, confirmed that this denture can achieve good therapeutic effect. However, in order to improve the stability of the overdenture, many attachments and retention designs are used, such as a Dalbo attachment, a Baku clip attachment, a B-D attachment, and the like. This requires special design and accessories, as well as skilled clinical and manufacturing techniques. At the same time these attachments are often damaged, in the use of often need to make adjustments, or even replace. Compared with these accessories and retention design, magnet retention overdenture more advantages, easy to operate. Especially in the promotion of denture retention, opened up a new way for overdenture. Now the information on the magnet retention for a review. Types of Magnets Cobalt-platinum alloy magnets Back in 1953, Behrman et al. Had grown magnets in the mandible to increase retention of the denture. Since then, Behrman has done a lot of research on the magnet planting technology and tissue reaction. He planted cobalt-platinum alloy magnets in tooth-free jaws using Teflon