The rubber barrier technology has the following obvious advantages: 1, safer: to protect the child from accidental swallowing of oral instruments, dental debris, pulp cleaning materials, corrosive liquids, etc. 2, more comfortable: the rubber barrier isolates the treated teeth from the child’s mouth, so the cooling water ejected from the dental drill during treatment will not enter the child’s throat and cause choking or nausea and vomiting, so it is especially suitable for children who are prone to vomiting and younger children. 3, greatly enhance the treatment effect: under the protection of rubber barrier can use more powerful and effective root canal disinfection solution, such as 5.25% sodium hypochlorite solution, which increases the effect of root canal disinfection and largely enhances the treatment effect, while avoiding the irritation of oral mucosa by rinsing solution; Studio Children’s Dentistry Zhang Zengfang 4, aseptic control, isolation of the treated teeth, to obtain a dry, clean and sterile treatment area, making treatment in a sterile condition, which improves the treatment success rate of vivisection, pulp regeneration techniques, etc. 5, treatment in a completely isolated environment, which makes the filling more solid and the filling is not easy to fall off