Place the tooth in boiling (almost boiling) water for one minute. This makes them more flexible and can be adjusted to the size at any time. Place the smiling teeth firmly on the existing teeth with a mirror. Press firmly on the tooth and then gently touch the material behind the real tooth with your thumb. After 30 seconds, gently remove the tooth from the mouth and place it in a glass of cold water to cool. The material turns white after curing. Enjoy the perfect smile.