https://stm2.bookpi.org/AETDGEAlTAD/issue/feed 2025-08-01T10:34:35+00:00 Open Journal Systems <p>The landscape of orthodontic treatment has witnessed significant advancements over the past few decades, particularly with the introduction and evolution of Temporary Anchorage Devices (TADs). Among these, extra-alveolar TADs have emerged as a pivotal innovation, providing unparalleled control and versatility in managing complex malocclusions. This manuscript is an earnest effort to compile, analyse, and present a comprehensive overview of extra-alveolar TADs, their biomechanical principles, clinical applications, anatomical considerations, and associated challenges.</p> <p>The objective of this work is to serve as a detailed academic reference for postgraduate students, clinical orthodontists, and researchers who seek to deepen their understanding of skeletal anchorage systems beyond the alveolar confines. Special attention has been given to the Infrazygomatic crest and mandibular buccal shelf—two key areas that have revolutionised treatment planning and outcomes in non-surgical orthodontics.</p> <p>This book aims to bridge foundational concepts with current evidence-based practices, supported by extensive literature and clinical insights. It is hoped that this compilation will foster improved clinical outcomes and inspire further exploration in the field of biomechanics and skeletal anchorage in orthodontics.</p> https://stm2.bookpi.org/AETDGEAlTAD/article/view/258 2025-08-01T10:34:35+00:00 Dr. ASWATHI SELVARAJ [email protected] Dr. MAHALAKSHMI KRISHNAKUMARAN Dr. BALAJI KRISHNAN Dr. MOHAN KUMAR. A. Dr. SHANTHINI PRIYA. S. Dr. DEEPAK PRABHU Dr. PARAMESWARAN. T.M. Dr. ASWINI SOUNDHARYA. S. Dr. MUGILAN. A. Dr. RAJESH RAMAN

<p>Orthodontic movement of the teeth is often limited by the anchorage limit, so much so that absolute anchorage is an essential component in the treatment of complicated orthodontics. Extra-alveolar temporary anchorage devices (TADs), such as infrazygomatic crest (IZC) and mandibular buccal shelf (BS) screws, have been introduced as alternatives to skeletal anchorage placement within the interradicular area. These implants provide improved primary stability, minimised risk to adjacent tooth roots, and the capacity to deliver multi-vector forces. The first group consisted of IZC screws inserted above the maxillary first molars, followed by BS implants inserted in the posterior mandible. utilize areas of dense cortical bone for solid anchorage with high levels of success. The manuscript illustrates the genealogy, development, classification, design, insertion techniques, anatomical concerns, and biomechanical rationales of extraalveolar TADs. Examples are presented emphasising a suitable case selection and the biomechanical management that these appliances can offer in the treatment of severe malocclusions, such as Class II and III, anterior open bites and impacted teeth. They can help accomplish full arch distalization and en-masse retraction, thus being a useful tool in extraction as well as non-extraction treatment modality. They force systems allow counter-clockwise and clockwise moments (which are appropriate for vertical and sagittal corrections) biomechanically. Clinical considerations, such as Liou and Lin’s IZC insertion methods, and safety factors including the maxillary sinus and inferior alveolar nerve, are discussed. Extra-alveolar TADs offer a minimally invasive, affordable, and extremely stable anchoring solution that significantly increases the options for orthodontic therapy while lowering the need for surgical procedures or patient compliance.</p>

2025-08-01T00:00:00+00:00 Copyright (c) 2025 Author(s). The licensee is the publisher (BP International).