光固化复合树脂的固化深度因光线通过充填材料、牙质、成形片逐渐减弱而受到限制。聚合深度的减弱与光线强度的减弱成正比。未完全固化的充填体理化性能都较差,易形成继发龋、过敏、折断、变色等。解决Ⅱ类洞充填体这个问题的办法就是用一种特制透明 The curing depth of the light curing composite resin is limited by the gradual attenuation of light through the filling material, dentin, and forming sheet. The decrease of the polymerization depth is proportional to the decrease of the light intensity. Not fully cured filling physical and chemical properties are poor, easy to form secondary caries, allergies, broken, discoloration and so on. Solve the problem of class II hole filling body is to use a special transparent