Mesial Three-Canal Management: Clinical Insights

This study presents eight cases of mandibular first molars with rare three-canal mesial roots (4 Type 3-2 and 4 Type VIII Vertucci classifications) in patients I treated aged 14–35. All patients presented with pulpitis/apical periodontitis, confirmed via preoperative radiographs showing mid-root canal disappearance, suggesting complex anatomy. Under dental microscopy and ultrasonic instrumentation, the middle mesial (MM) canal was systematically located between mesiobuccal (MB) and mesiolingual (ML) canals. DG16 exploration and targeted ultrasonic dentin removal between MB/ML enhanced MM detection. Two-year follow-ups confirmed favorable outcomes. Radiographic clues (mid-root canal fading) and magnification tools were pivotal. The MM canal, positioned between MB/ML canals, demands strategic dentin removal to optimize access. Ultrasonic refinement minimized structural damage while maximizing visibility—a critical advancement over conventional techniques. Missed canals remain a leading cause of endodontic failure. Proactive MM identification via microscopy and ultrasonics, guided by radiographic patterns, significantly improves success rates. This series highlights reproducible protocols for managing anatomical complexities, emphasizing the necessity of technology-driven approaches in modern endodontics. Clinicians must recognize these variations to avoid iatrogenic errors, underscoring the study’s clinical relevance in elevating treatment precision and outcomes.