By the end of this training, participants should be able to: 1. Define and describe the anatomy and clinical significance of lateral and accessory canals in endodontics. 2. Explain the etiology and pathogenesis of infections associated with lateral canals. 3. Identify clinical and radiographic features suggestive of lateral canal involvement. 4. Discuss the principles and rationale behind non-surgical (conservative) management of lateral canals. 5. Demonstrate the use of advanced irrigation and disinfection techniques to effectively manage lateral canal infections. 6. Select appropriate root canal filling materials and techniques that ensure adequate sealing of lateral canals. 7. Evaluate clinical outcomes and determine success criteria for non-surgical management. 8. Recognize cases that require surgical intervention when non-surgical management is inadequate.