The aim of this pilot study is to examine the patient's induced stress and the young dentist's induced stress, during endodontic treatment. This study is carried out using physiologic (cortisol measurement, arterial pressure and heart rate) and psychological data (VAS visual analog scale of stress, pain and discomfort, CORAH and HAD Scales) collected from patients of Brest University Dental Hospital at various stages of root canal treatment. The endodontic treatment is carried out under the usual standards and practices.