The aim of this presentation is to evaluate options that the endodontic retreatment spectrum provides to retain the natural dentition. Modern clinical practice requires dentists to be familiar with new developments in materials, instruments, and procedures to assist their patients in electing the most beneficial long-term treatment option in terms of maintaining health and function. Endodontic Surgery has evolved into a microsurgical procedure with predictable outcomes. However, there are specific cases for which surgical endodontics is not a replacement for conventional retreatment. Successful treatment requires a thorough understanding of the causes of failure, the prognosis of each approach, technologies and materials that allow for the best possible outcome. This presentation will review the specifications of the techniques and relevant literature evaluating the prognosis of microsurgical and conventional retreatment, which will help the decision-making process be an informed one.

The importance of periodontal tissue maintenance and aesthetics, particularly in the frontal areas, must be considered integral to the success of endodontic surgery. Periodontal surgical techniques aimed at preserving the papilla have proved to be a highly effective solution. Un autre point très important est la gestion de la régénération osseuse en fonction du nombre de parois existantes de la lésion elle-même, ce qui rend la décision peropératoire très importante pour éviter la présence de cicatrice fibreuse.

Tooth autotransplantation is an increasingly relevant treatment option in contemporary dentistry, offering a biologically advantageous and cost-effective alternative to implants-particularly in young patients or in cases where maintaining natural tooth structure is prioritized.

This lecture will explore the principles, protocols, and innovations that are reshaping the way clinicians approach autotransplantation. Emphasis will be placed on the integration of advanced imaging (CBCT) and digital workflows, which have significantly improved the accuracy, predictability, and long-term outcomes of this technique.

Key topics to be covered include:

• Biological rationale andclinicalindications for autotransplantation
• Patient and donor tooth selection: root development stages, anatomical compatibility, and success predictors
• The role ofCBCTand digital planning, including 3D reconstructions and virtual simulation
• Use of3D-printedsurgical guides and donor tooth replicas to reduce extraoral time and trauma
• Surgical protocol: atraumatic extraction, recipient socket preparation, positioning, splinting, and follow-up
• Endodontic considerations: pulp revascularization vs. RCT, especially in immature roots
• Clinical outcomes, long-term success rates, and comparison with implants
• Potential complications and how to manage them

Several clinical cases will be presented to illustrate step-by-step procedures and highlight the biological and technological synergy that makes this technique increasingly viable and successful.

This session will provide participants with practical, evidence-based knowledge that can be applied in daily clinical practice-especially in multidisciplinary cases where conservative, regenerative approaches are prioritized.

“Endodontic Microsurgery: When Things Go Wrong“

Endodontic microsurgery is often associated with precision and success, yet it carries inherent risks and challenges. This lecture will explore the common pitfalls, mistakes, and reasons for failure in endodontic microsurgery. Through clinical cases and evidence-based analysis, we will highlight key factors that compromise outcomes – aiming to help clinicians recognize, prevent, and manage these complications effectively.

“Guided Endodontic Microsurgery

Guided endodontic microsurgery combines digital planning with dynamic or static navigation to enhance precision in complex surgical cases. This lecture will showcase how guided techniques can improve accuracy, minimize invasive access, and optimize clinical outcomes. Supported by scientific evidence and clinical experience, we will explore indications, workflows, advantages, and potential limitations of this emerging approach in endodontic surgery