不同洞缘角磨牙Ⅰ类洞复合树脂充填的应力分布

陈红星,刘思瑶,黄雨亭,潘爽

Stress distribution of composite resin filling in Class I cavity of molars with different cavosurface angle

CHEN Hongxing,LIU Siyao,HUANG Yuting,PAN Shuang

表2 材料的力学性能

Table 2 Mechanical properties of materials

Item Young’s modulus (MPa) Poisson’s ratio Linear shrinkage (%) Linear thermal expansion coefficient Thicknesses (mm) Enamel 80 000 0.30 Dentin 18 000 0.23 Resin composite 12 000 0.25 1 0.003 3 Adhesive bonding 4 000 0.30 1 0.003 3 0.01 Food bolus 3 410 0.10 Pulp 2 0.48 Spongious bone 1 370 0.30 Contical bone 13 700 0.30 Periodontal ligament 68.9 0.45