Department of Orthodontics, Faculty of Dentistry, Kyungpook National University, Daegu, South Korea2006, 173 pp. quality - good, color scanned pages. Foreword by . Professor Jae-Hyun Sung . I was first introduced to traditional orthodontic treatment but the ejuice method while studying orthodontics at Kyung-Hee University Clinic immediately after graduating from the Faculty of Dentistry at Seoul National University in Korea. I started using standard ejuice braces in my work, t. e. Zero-torque and angulated braces. Later, I switched to the use of braces with the inscription Brosar. I very often used Bull's compression loops (the so-called Bull's loop) to retract incisors after distalizing the fangs. The results of this treatment were usually good. However, every time I had to treat patients with a class 1 subclass II bite pathology (especially in high angle cases) using the traditional ejuice technique, including wearing Class II elastics, I encountered a number of serious problems. Although , that I was able to achieve satisfactory results in terms of occlusion, Very often there was an excessive slope of the upper incisors ,. Resorption of Incisor Roots , the curve of the upper and lower dentition became more pronounced, there was a rotation of the lower jaw down and behind . Against the background of the described problems, it was difficult for me to communicate with patients (and their families), t. k. We have all seen that the profile after treatment became worse than it was before treatment. 1). At that time, it seemed that there was no way to avoid these adverse effects in the treatment of patients with occlusion pathology in class II .. In 1982, I was introduced to the original Tweed technique, modified Tweed technique, and the differentiated stabilisation support system technique. I tried to treat skeletal pathology in class II according to the modified Tweed technique. The treatment protocol included the use of standard ejuice braces and was based on the differentiated stabilisation support technique. The results of the treatment were slightly better than those achieved with the usual technique of ejuice .. However, during the treatment process, it was still not possible to avoid problems such as rotation of the lower jaw to the bottom and behind (Figure .). 2). In April 1986, I attended a Tweed -Merrifield course at Tucson. Then I realized CM. that directed force mechanics with high thrust frontal arc with J hooks will allow me to solve those difficulties and problems, which I encountered during the treatment of patients with high angle and malocclusion pathology in class II using traditional ejuice technique in combination with elastics of class II . After I changed my treatment protocol, I was able to achieve satisfactory results, although the duration of treatment became longer. 3), I found that it was very difficult to achieve good cooperation from many patients due to the fact that the treatment used a facial arc. Then my colleagues and I began to study the possibility of using directed force mechanics without the use of a frontal arc. I believed that understanding biomechanics would be the key to solving this problem. We began to look for a kind of support that would not depend on the patient. At a clinical conference held in my department in 1999, two graduates of our University (Dr. Seong-Min Vae and Dr. Hyo-Sang Park) presented a report on the results of treatment, during which surgical mini screws were successfully used to create a support . Encouraged by this discovery , We have reviewed the literature, dedicated to skeletal stabilizing support due to dental implants , miniplates and other similar devices and found, There have been previous studies[edit] dedicated to the use of dental implants in orthodontics as a stabilizing support. However,, It is also clear that , that the use of these systems as an orthodontic support has a number of disadvantages, including anatomical limitations due to their large size, High cost , Duration of treatment , Additional Time , , [ necessary for healing after surgical manipulation ...... [ We came to the conclusion that the use of microimplants is most justified in view of the simplicity of the surgical procedure, the ease of implantation (installation) and extraction, minimal atomic limitations and the possibility of their direct load immediately after installation. We decided to try using micro-implants to create support as an alternative to the facial arc. I encouraged my colleagues to use microimplants as an orthodontic support in the treatment of a large number of patients. We obtained excellent results in the treatment of a large number of types of bite pathologies, including bimaxillary protrusion, molar intrusion, molar alignment, distal molar movement, open bite, as well as class II and III pathology . At first, we tried to use surgical screws that are used to fix bone fragments during orthognathic surgery. Unfortunately, we realized that surgical mini screws are not designed to accommodate orthodoic elastic elements, springs and elastic chains on them. Had to make a hook of ligature wire at the top of each screw to attach such devices. Moreover, it was more difficult to remove such screws due to the lack of a head .. Given these limitations, we have developed new titanium micro-implants for use in orthodontics. These micro-implants had a special head in the form of a button with a small hole in which ligature wire and orthodontic elastic elements could easily pass. Also, these micro-implants had a hexagonal rod that was easily grasped by a screwdriver during administration, a smooth neck located in the mucous membrane area and reducing the risk of inflammation, and a screw-sliced rod that was implanted into bone tissue.. The development of new microimplants has made it possible to introduce into practice an excellent treatment protocol based on directed force mechanics. We also used prescription braces instead of standard braces to reduce the number of bends on the arcs and the time spent on each visit. We called the system we developed “micro-implant-based orthodontic treatment.” In the case of treatment with removal, the use of microimplants allows not only to prevent the loss of anchorage but also to achieve distal displacement of the lateral teeth simultaneously with retraction of the front teeth. Thus, we believe that micro-implants are an ideal or “absolute” support (absolute anchorage). Proved, that absolute support can be effectively used to solve various orthodontic problems, such as distal movement of teeth, Mesial displacement of the lateral group of teeth , Alignment of molars, distal movement of molars , correction of cross-scissor bite , Correction of the middle line , Intrusion of the anterior and lateral groups of teeth , occlusive plane tilt correction. We are convinced that this technique of creating anchorage will allow us to reconsider views on orthodontic treatment in the new millennium. This book introduces readers to our experience of using microimplants to build support. We are pleased to share our knowledge and experience with orthodontists around the world.