Assessment of endodontic treatment outcomes has evolved from disease-based criteria proposed by Strindberg to patient-centred values, emphasising survival and function of endodontically treated teeth even in the presence of inflammatory peri-apical disease. It is essential that patients are fully informed of the distinction between disease-free and disease-associated treatment outcomes. Ideally, disease-free treatment outcomes should always be the goal of all endodontic treatments.Treatment success can be based on a variety of factors including but not limited to symptom resolution, the...