Root canal treatment means surgically removing the nerves located at the roots of the tooth. If untreated, long-term untreated cavities progress in the tooth and reach the pulp tissue, that is, the nerves, this tooth requires root canal treatment. Our patients can understand this as follows; when you have pain that wakes you up at night or when you have pain that starts suddenly and does not go away for a long time, this means that the tooth now requires root canal treatment. Following root canal treatment, an aesthetic and functional filling is applied to the tooth.