I have learned the knowledge of filling teeth before. The difference between resin Z250 and Z350 is that the particle size is different. 250 is larger and the light transmittance is worse. 350 is a large particle cluster composed of small particles, which has both light transmittance of small particles and light transmittance of large particles, similar to real teeth. I made up two holes in Victoria Harbour opposite Yingbin Square in Gongbei, Zhuhai, both of which are Z350. There was a special price when I went. I bought a * * * for about 800 yuan, which is quite cheap. I suggest you go to a face-to-face consultation and ask yourself.