近年来采用永久磁片固位法,修复大型联合组织缺损,经临床观察,效果良好。现介绍于下。一、操作方法 1、中空式义颌的制作:(1)义颌分两部制作。下半部用术前预成之义齿基托为托盘,以弹性印模材取上颌缺损区之下半部印模。然后将托盘及印模一同装入型盒。装盒前,要将 In recent years, the use of permanent magnetic plate retention method to repair large joint defects, the clinical observation, the effect is good. Now introduced in the next. First, methods of operation 1, hollow denture production: (1) Yali divided into two parts. The lower half of the preoperative denture base tray for the tray, to take the elastic impression material to the upper part of the defect area of ​​the lower half of the impression. Then insert the tray and impression together into the box. Before packing, to be