The convergence of skeletal anchorage systems—including temporary anchorage devices (TADs) and miniplates—with 3D printing technology and clear aligner therapy has markedly advanced the precision, predictability, and efficiency of contemporary orthodontic treatment. These technologies collectively facilitate customized biomechanics, minimally invasive protocols, and superior patient-centric outcomes, particularly in complex malocclusions.

This presentation provides a comprehensive overview of the current evidence base and clinical applications of 3D printed appliances, skeletal anchorage modalities, and their synergistic integration with aligner-based biomechanics. The versatility and reliability of TADs, including interradicular screws and extra-alveolar anchorage sites, are examined in the context of digitally designed appliances and force systems. In parallel, the role of miniplates in managing high anchorage demands—such as en masse distalization, anterior open bite closure, and vertical control in hyperdivergent cases—is critically evaluated.

Special emphasis is placed on the digital workflow, encompassing intraoral scanning, appliance design via CAD software, and 3D printing for the fabrication of custom jigs, force delivery modules, and precision surgical guides.

Illustrative clinical cases will demonstrate the efficacy of combining 3D printed adjuncts and skeletal anchorage in treating Class II/III discrepancies, impacted teeth, anterior open bites, and vertical maxillary excess.

In conclusion, the strategic amalgamation of 3D printed appliances, skeletal anchorage systems, and aligner therapy represents a paradigm shift toward more individualized, biologically efficient, and aesthetically acceptable orthodontic interventions—positioning these modalities at the forefront of future-forward clinical orthodontics.

Bruxism in orthodontic patients can cause complications such as gingival recession due to premature occlusal contacts, temporomandibular disorders and appliance breakage. Our studies suggest that sleep bruxism may be triggered by gastroesophageal reflux (GER) and function as a biological defense mechanism by promoting salivation and swallowing to clear esophageal acid. We have also reported similar findings for awake bruxism. Recent meta-analyses support GERD as a significant risk factor for sleep bruxism, reinforcing our hypothesis. These findings suggest a paradigm shift - from viewing bruxism as a non-functional activity to recognizing it as a potentially adaptive response. This presentation will introduce this new concept, review conventional management, and propose novel strategies based on our recent studies.

In addition, the use of orthodontic miniscrews as absolute anchorage has greatly enhanced the predictability of treatment for severe malocclusions. We conducted the first factor analysis of miniscrew failure, which remains one of the most frequently cited original research articles in orthodontic journals published since 1990. Although miniscrews inserted into the buccal alveolar bone (attached gingiva) between the maxillary or mandibular second premolar and first molar exhibit reported success rates of 80–90%, failures continue to pose clinical concerns. Recent meta-analyses have indicated that root contact is a critical determinant of miniscrew instability. In this presentation, I will first review the key risk factors for miniscrew failure, then discuss conventional prevention strategies, and finally report on our development of a noninvasive miniscrew-root contact detection device.

Orthognathic surgery has evolved significantly over the past decades. From its roots in traditional osteotomies to the integration of advanced digital technologies, the field continues to advance toward greater precision, safety, and predictability. In this lecture, I will provide an overview of the historical techniques and principles that have laid the foundation for jaw deformity correction, followed by an exploration of modern advancements such as virtual surgical planning, 3D simulation, and the use of navigation systems. Furthermore, I will present a novel osteotomy design that enhances both aesthetic and functional outcomes, based on the concept of anatomical harmony and minimal invasiveness. In addition to discussing current techniques, I will also highlight future directions, including AI-assisted planning, robot-assisted surgery, and the potential for regenerative approaches. The lecture will aim to bridge tradition and innovation, offering attendees a comprehensive view of how orthognathic surgery can continue to evolve in both clinical and academic contexts. Through this lens, we hope to inspire new standards in interdisciplinary care and contribute to the global advancement of adult orthodontics and craniofacial surgery.

Compared to conventional orthognathic surgery (CS), the Surgery First Approach (SFA) is no longer a topic of controversy and has become a well-recognized treatment modality among many orthodontists, oral and maxillofacial surgeons, and patients.

However, in patients with severe facial asymmetry undergoing orthodontic surgery, it is often observed that not only anteroposterior dental relationships but also the buccolingual inclinations of posterior teeth are canted to compensate for the asymmetry. This creates difficulty in achieving a stable surgical occlusion, raising concerns about the predictability and stability of postoperative orthodontic outcomes.

Previous traditional studies on transverse occlusion have mostly relied on posteroanterior (PA view) cephalometric radiographs or dental casts to measure the arch width or inclination changes of posterior teeth. However, these methods have limitations in accurately evaluating three-dimensional buccolingual inclination changes of the maxillary and mandibular teeth.

Therefore, this presentation aims to investigate whether SFA can achieve comparable treatment outcomes and functional recovery to CS in patients with skeletal Class III malocclusion accompanied by facial asymmetry by using three-dimensional computed tomography analysis, and to evaluate transverse inclination changes before and after surgery and discuss the factors that may influence the long-term stability of SFA in skeletal Class III with facial asymmetry.

In this lecture, I would like to share my personal views on the current state of preventive orthodontics and my expectations for future orthodontic clinical practice.

Preventive orthodontics is an orthodontic treatment approach aimed at preventing the onset and progression of malocclusion. In recent years, blended orthodontics, which combines functional orthodontic appliances and myofunctional therapy (MFT), has been gaining attention, and the importance of early intervention for growing patients has been reaffirmed.

Furthermore, advances in identifying the causes of malocclusion through DNA analysis have made it possible to propose preventive measures tailored to individual risks, potentially leading to more effective treatment plans.

Recently, the digitalization of orthodontic diagnosis has progressed rapidly, with diagnostic technologies utilizing 3D image analysis and AI being introduced into clinical settings. This has enabled more precise occlusion evaluations and treatment plans in addition to traditional models and radiographs.

The use of digital technology is promoting personalized medicine and significantly improving the quality and efficiency of treatment.