root canal treatment Female 2 Humans 2 Male 2 Middle Aged 2 Root Canal Therapy 2 endodontic procedure 2 female 2 human 2 male 2 middle aged 2 Adolescent 1 Adult 1 Aged 1 Child 1 Cross-Sectional Studies 1 Cross-sectional study 1 Follow-Up Studies 1 Gutta-percha 1 Patient Satisfaction 1 Periapical Periodontitis 1 Retrospective Studies 1 Root Canal Filling Materials 1 Root Canal Obturation 1 Rubber Dams 1 Surveys and Questionnaires 1 Thermafil 1 Tooth, Nonvital 1 Treatment Outcome 1 Young Adult 1