Methods:According to aesthetic principle, using photo solidifying compoundresin to have closed 210 front tooth gaps when treating 138cases.
方法：根据美学原理，利用光固化复合树脂对2 10个前牙牙间隙进行关闭治疗。
2
On the basis of counting solids, in the compoundresin, the weight ratio of the acrylic resin with glycidyl and the siloxane prepolymer is between 10 and 40 to between 60 and 90.
The specification identifies the resincompound to be used and stipulates minimum resin content, solution viscosities, and physical performance qualities.