Some time ago, my child had a cavity. Every time he ate, he cried out in pain. He had to wait in line to go to the hospital, and he was very scared. I bought this product with the intention of trying it, but I didn't expect the effect to be surprisingly good. According to the instructions, soften the plastic beads with hot water. The process is extremely simple and children can help. The soft plastic beads are very flexible, can perfectly fill the cavity with just a light press, the excess can be easily trimmed. After natural hardening, it fits the tooth and the color is very similar to real teeth. If you don't look closely, you can't find any trace of filling.