TruNatomy: Clinical walkthrough

Navigating the Calcified Maxillary Molar: A Clinical Guide to Dentine Preservation and Predictable Endodontics

Overview

This video provides a detailed clinical walkthrough of a complex endodontic treatment on an upper left first molar involving a distal crack and calcified canals. We follow the procedure from diagnosis to obturation, specifically focusing on how the TruNatomy system allows for conservative preparation in high-risk patients where avoiding extraction is paramount.

Key Topics Covered

• Diagnostic Imaging: The transition from 2D periapical radiographs to 3D CBCT to identify periapical radiolucencies and reactive sinus lining thickening.
• Structural Management: The "clear the decks" approach to removing old restorations and assessing the depth of cracks to determine restorability.
• Instrumentation Strategy: Utilising the TruNatomy system (Orifice Opener, Glider, and Prime files) to navigate high-degree curvatures and calcified anatomy.
• Anatomical Variations: Specific techniques for identifying and shaping the MB1 and MB2 canals, including the use of brushing motions to remove dentine lips.
• Advanced Irrigation: The application of flexible, two-port irrigation needles and sonic activation to ensure thorough disinfection in conservative shapes.
• Precision Obturation: The benefits of epoxy resin sealers and matching "Conform Fit" gutta-percha cones to achieve a dense, dimensionally stable fill in narrow preparations.

Clinical Relevance

For the practising dentist, this case is particularly relevant when treating patients with complex medical histories, such as those on IV bisphosphonates, where endodontic success is vital to prevent osteonecrosis. The video highlights how modern, minimally invasive instrumentation preserves the peri-cervical dentine, thereby increasing the long-term fracture resistance of the tooth.

Learning Outcomes

• Assess Restorability: Determine the clinical significance of crack lines and when a 2mm cuspal reduction is necessary to protect the tooth during treatment.
• Master the TruNatomy Sequence: Correctly apply the instrumentation sequence and techniques, such as the "symphony of motion" and brushing strokes, to manage calcified and curved canals.
• Optimise Disinfection: Implement effective irrigation protocols using flexible needles and sonic activation within conservative canal preparations.
• Achieve Precise Obturation: Select and fit matching gutta-percha cones and sealers that complement narrow canal shapes for a predictable apical seal.