MAGNETIC RETENTION FOR COMPLETE AND PARTIAL OVERDENTURES .1.
MAGNETIC RETENTION FOR COMPLETE AND PARTIAL OVERDENTURES .1.
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DOI：
10.1016/0022-3913(81)90032-9
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发表时间：
1981-01-01
影响因子：
4.6
通讯作者：
GILLINGS, BRD
中科院分区：
文献类型：
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作者：
GILLINGS, BRD
多年来，磁铁一直被用作义齿固位的辅助工具，并取得了一定的成功。新型钴和稀土磁体合金的发展极大地扩展了磁性固位在可摘局部义齿、全覆盖义齿、固定局部义齿和分段义齿中的潜在应用。磁场对组织的影响已被广泛研究，结果相互矛盾，但描述牙科应用的磁体报告声称没有损伤组织的影响。所描述的闭合场磁保持系统通过使用成对的磁体和以改进的马蹄形布置的固定且可拆卸的保持器来避免磁场对组织的任何可能性。可拆卸的保持器被粘固或拧到去冠的、根治疗的牙齿上。义齿固位元件由成对的磁体和固定的保持器组成，邻接牙根中的保持器，并通过磁吸引力将义齿保持在适当的位置。当就位时，义齿或牙根周围没有外部场。这种安排也加倍可用retention.The形状，大小，和配置的两个磁铁和固定和可移动的保持器被选择，以提供最大的保留在一个磁性义齿固位单元的大小方便大多数应用程序。所提供的保持力约为每单位300克。磁性合金Co5Sm非常硬但易碎，在口腔中会腐蚀。为了防止这种情况发生在服务中，端板保护暴露的磁铁面。与保持器相同的不锈钢合金板防止磁体腐蚀，并减少使用中义齿固位保持器元件界面的磨损。
Magnets have been used as aids to denture retention for many years with some success. The development of new cobalt and rare earth magnet alloys has greatly extended the potential application of magnetic retention in removable partial dentures, complete overdentures, fixed partial dentures, and sectional dentures.Effects of magnetic fields on tissues have been investigated extensively, with conflicting results, but reports describing dental applications for magnets claim no damaging tissue effects. The closed-field magnetic retention system described avoids any possibility of magnetic field effects on tissues by using paired magnets and a fixed and detachable keeper in a modified horseshoe arrangement. The detachable keeper is cemented or screwed to a decoronated, root-treated tooth. The denture-retention element, consisting of paired magnets and a fixed keeper, abuts the keeper in the tooth root and holds the denture in place by magnetic attraction. When in position, there is no external field surrounding the denture or tooth root. This arrangement also doubles the available retention.The shape, size, and configuration of the two magnets and fixed and removable keepers were chosen to provide maximum retention in a magnetic denture retention unit of a size convenient for most applications. The retention provided is approximately 300 gm per unit.The magnet alloy, Co5Sm, is very hard but brittle, and it can corrode in the mouth. To prevent this from occurring in service, end plates protect the exposed magnet faces. The plates, of the same stainless steel alloy as the keepers, prevent magnet corrosion and reduce wear at the denture-retention keeper-element interface in service.