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为了研究部分义齿主要连接体设计的力学条件,作者在上颌单侧游离端义齿的模拟模型上,测得负重所致腭杆变形伴随的基托垂直变位量,探讨了腭杆对抗基托近远中旋转所需要的强度。实验使用的铸造腭杆厚度:锡一银合金是0.7、0.9、1.1、1.3及1.5mm,铂—金合金和钴—铬合金分别是0.7、0.9、1.1及1.3mm;成品钴—铬合金腭杆的横断面呈半园形,宽约3.7mm,最厚之处在中
In order to study the mechanics of the design of major dentures in partial dentures, the authors measured the vertical displacement of the base accompanied by the deformation of the palatal bar under the load in the simulation model of maxillary unilateral free end dentures. The strength needed to rotate far. The thickness of the cast palatal rod used in the experiment was 0.7, 0.9, 1.1, 1.3 and 1.5 mm for the tin-silver alloy and 0.7, 0.9, 1.1 and 1.3 mm for the platinum-gold alloy and the cobalt-chromium alloy respectively; Cross section of the rod was semi-circular, width of 3.7mm, the thickest in the