Light-cured resin is a resin material with strong adhesive properties, and it is not particularly strict on the shape of the cavity, unlike silver-mercury fillings, which require a perfect cavity shape. The situation of front teeth and back teeth is different. After filling the back teeth, if it is a maxillofacial cavity, it will keep for a very long time, maybe more than ten years, twenty years, there is no problem. After filling the front teeth, if the patient breaks the teeth due to trauma, after restoring the shape with resin, care must be taken in the process of using, not to gnaw very hard things, such as gnawing on ribs, gnawing on bones, biting the hard shells of crabs, and similar actions as little as possible, and then the resin filling material of the front teeth will be maintained for a long period of time. The resin material will have aging for a long time, if the patient uses it more carefully, there is no problem with 5 or 10 years.