If a decayed tooth does not hurt the nerve or is very close to the nerve, the steps of filling are divided into the following points: 1, according to the location of the decayed tooth on the rubber barrier, isolate the moisture to exclude other infected materials; 2, after the rubber barrier is on the process of decaying the decayed tissue, removing the black part of the decayed tissue and soft scale; 3, cleaning and disinfection; 4, after disinfection, it is necessary to apply the bonding agent, before Before applying the bonding agent, it is necessary to protect the part close to the nerve, put the nerve protection agent, and carry out the normal filling after bedding. Filling is divided into many kinds of materials, for the material adjacent to the nerve can choose 3M glass ion less irritating to the nerve material, in addition, if you want to achieve beautiful and hardness requirements, you can also fill with resin.