修复技术中使用的磁性附着体已得到长足的发展,不同尺寸和种类的磁性附着体广泛应用于修复体中,能够提供较好且稳定的固位力。但其实际固位力并不能达到其理论标称值。经反复疲劳摘戴后的固位力与初始固位力并无显著性差异。在使用中较精密附着体和半精密附着体稳定。磁性附着体增强固位的种植赝复体修复也具有良好的固位效果。不同材料和种类的磁性附着体的固位力不同。影响磁性固位力的因素有磁体与衔铁的接触紧密程度、接触面积、漏磁量、不同尺寸的磁体与衔铁及两者的匹配性及加热处理等。磁性附着体在使用中其衔铁受力后应力主要集中分布在根桩颈部和基牙颈部;在垂直载荷下各部分应力都较小且分布合理。具有应力缓冲装置的磁性附着体使得基牙与种植体受到的应力得到缓冲,而自我调节型磁性附着体对基牙产生的侧向力小于传统的磁性附着体和球帽附着体。磁性附着体种植覆盖义齿在咬合时,应力既分布到种植体,也分布到剩余牙槽嵴,可以明显降低种植体周围骨组织的应力,有利于种植体的健康。 Magnetic attachments used in repair techniques have evolved considerably. Magnetic attachments of various sizes and types are widely used in prostheses to provide good and stable retention. However, its actual retention does not reach its theoretical nominal value. There was no significant difference in retention and initial retention after repeated fatigue. In use, the more precise attachment and semi-precision attachment stability. Magnetic attachments enhanced retention implant prosthesis repair also has a good retention effect. Magnetic attachments of different materials and types have different retention forces. The factors that influence the magnetic retention force are the contact degree of the magnet and the armature, the contact area, the amount of magnetic flux leakage, the matching of the magnet with the armature of the different sizes and the two and the heat treatment. The magnetic attachments in the use of the armature after stress is mainly concentrated in the root and root of the root of the abutment neck; under vertical load in all parts of the stress is small and reasonable distribution. Magnetic attachments with stress dampening buffer the abutments and implants to a cushion, while self-adjusting magnetic attachments produce less lateral force on abutments than conventional magnetic attachments and ball cap attachments. In the occlusal attachment of magnetic attachment, the stress distributes not only to the implant, but also to the remaining alveolar ridge, which can significantly reduce the stress of the bone tissue around the implant and is beneficial to the health of the implant.