Abstract Page The Art of Preservation: Modern Approaches to Minimally Invasive Tooth Design

Background: Minimally invasive tooth preparation (MITP) has emerged as a key approach in restorative dentistry, focusing on the preservation of healthy enamel and dentin while achieving optimal esthetic and functional outcomes. Unlike traditional methods that rely heavily on mechanical retention and substantial tooth reduction, MITP utilizes advanced adhesive technologies and contemporary restorative materials to support conservative treatment strategies. Objective: This review aims to provide a comprehensive overview of MITP techniques, including their principles, clinical indications, preparation methods, finish line designs, material selection, and long-term outcomes. It also evaluates digital innovations such as 3D-printed guides and CAD/CAM systems that enhance precision in clinical execution. Methods: A thorough literature review was conducted using PubMed, ScienceDirect, and other databases to identify relevant clinical studies, reviews, and case reports published between 2000 and 2024. Key inclusion criteria focused on studies assessing enamel preservation, adhesive performance, restoration success rates, and advances in preparation guidance technologies. Results: MITP techniques such as the depth-groove method, silicone index guidance, and mock-up guided preparation were found to significantly reduce unnecessary tooth reduction and improve enamel preservation. Finish line designs including chamfer, feather-edge, and incisal butt joint were compared for their mechanical performance and esthetic integration. Clinical evidence supports the long-term success of bonded ceramic restorations, particularly when bonded to enamel, with survival rates exceeding 90% over 10 years. Conclusion: Minimally invasive tooth preparation is an evidence-based, patient-centered approach that enhances restoration durability, esthetics, and biological integrity. The integration of digital workflows, careful material selection, and attention to occlusion further support the reliability and predictability of these techniques. Future innovations, particularly in AI and biomimetic materials, are expected to further refine MITP practices.