The article focuses on the case of a 58-year-old patient who was referred to undergo endodontic evaluation because of the mild pain she experienced on her maxillary left molars. It shows that the patient has a pulp necrosis with chronic apical periodontitis. It explains the root canal therapy procedures applied to her maxillary molars. It emphasizes the importance of using magnification and proper lighting in locating and treating the canals of a patient.