Professor Duan Yinzhong, Professor of Orthodontics Department of Stomatology Hospital of the Fourth Military Medical University, has successfully solved the “distraction osteogenesis, suture growth and perioral force measurement” which are regarded as the most challenging orthodontic problems; This achievement won the first prize of science and technology progress of Shaanxi Province in 2010
Dental maxillofacial deformities are one of the three most common diseases of the oral cavity. The incidence rate is as high as 72%. Bone inversion is the most difficult to cure.
researchers first studied the rapid growth of distraction osteogenesis based on the physiological and pathological characteristics of bony inversion. They were nbsp on the basis of animal experiments. It is the first time to discover the transforming growth factor beta of distraction osteoblasts; These two factors, bone morphogenetic protein-1 and bone morphogenetic protein-2, can promote cell proliferation, differentiation and extracellular matrix synthesis, and their distraction osteogenesis technology can promote the rapid growth of distraction osteogenic tissue. The success of the research of
lays a foundation for solving the problem of the source of bone material defect in the treatment of skeletal reverse appliance
It is another difficult problem to solve the problem of “bone suture growth stagnation” in non-surgical treatment of skeletal crossbite. For many years, the traditional concept that “after the growth period, anterior traction treatment is ineffective” has become a medical forbidden area. Doctors can only hope for the disease, but patients have to give up treatment; In addition, we have developed a new type of orthodontic device with fixed appliance for upper jaw and movable appliance for mandible, which can effectively solve the problem of bone suture growth stagnation, and achieve the correction effect that can only be obtained by surgery, which means that the growth and development stage has passed; The treatment of adolescent patients has brought new opportunities
In the past, there were few monographic studies on the essential relationship between the abnormal oral force and the lingual body position and osseous crossbite. However, their study for the first time found that the perioral force of patients with malocclusion would change adaptively due to the changes of dental morphology, and the relative position of the maxilla was an important factor determining the magnitude of the perioral force; The abnormal perioral force is one of the new mechanisms of the causes of skeletal malunion.
they also found that the tongue body of patients with osseous regurgitation is too large, and its position is abnormal in front or back, which may be one of the causes of opening and closing deformities; A 603, a 603, and a 603 were used to improve the accuracy of orthodontic treatment
At present, 3860 cases of deciduous dentition, mixed dentition, permanent dentition and adult skeletal crossbite were treated with this technique, and the success rate was 94.5%