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It is necessary to study the human enamel prisms size at different periods of postpartum ontogenesis by atomic force microscopy.The study involved 94 males which were divided into groups by age: 15-20, 21-30, 31-40, 41-50, 51-60 years old, each examined male had one 3.8 or 4.8 tooth removed (from the fracture line in the region angle of the mandible, according to orthodontic indications) for medical reasons. The shape, roughness, length and width of the enamel prisms were studied in the Image Analysis NT-VDT program according to the method of Omsk State Medical University.The enamel prisms structure at all ages has a regular, ordered shape with 6-sided and 7-sided figures. The most constant structure occurs at the age group of 41-50, 51-60 years. The fastest enamel prisms growth occurs in the direction that increases the prism length at all ages. Growth on a plane which increases the prism width is slow at 41-50 years. It is catching up with the growth rate of enamel prisms in length at 51-60 years old. Enamel prisms at 15-20, 21-30 years old stretch faster in the horizontal direction.In maturation process, due to correct and harmonious growth, enamel prisms are timely modified from pyramidal form in the early postpartum period to a prismatic form in the late postpartum period of ontogenesis.Изучить размеры эмалевых призм человека в различные периоды постнатального онтогенеза методом атомно-силовой микроскопии.В исследовании приняли участие 94 человека мужского пола, которые были разделены по возрасту: 15—20, 21—30, 31—40, 41—50, 51—60 лет. У каждого обследованного по медицинским показаниям (из линии перелома в области угла нижней челюсти, по ортодонтическим показаниям) удаляли по одному зубу 38 или 48. Форму, шероховатость, длину, ширину эмалевых призм изучали в программе Image Analysis NT-VDT по методике ОмГМУ.Структура эмалевых призм во всех возрастах имеет правильную, упорядоченную форму с 6- и 7-гранными фигурами. Наиболее постоянная структура встречается в 41—50, 51—60 лет. Во всех возрастах самый быстрый рост эмалевых призм наблюдается в направлении, увеличивающем длину призмы. Рост на плоскости, увеличивающий ширину призмы, является медленным, в 41—50, 51—60 лет догоняющий темпы роста эмалевых призм в длину. Эмалевые призмы в 15—20 и 21—30 лет вытягиваются быстрее в горизонтальном направлении.В процессе созревания за счет правильного и гармоничного роста эмалевые призмы своевременно видоизменяются из пирамидальной в раннем постнатальном периоде в призматическую форму в позднем постнатальном периоде онтогенеза.

Experiments on rabbits compared the X-ray, morphological, and magnetic resonance imaging of compression fractures of the vertebral body. Edema of the bone marrow of the vertebral body was ascertained to be a basic morphological substrate that evokes a modified MR signal. The data on 178 children with suspected compression fracture of the vertebral body were used to consider the potentialities of MRI and X-ray study in this pathology. The MRI semiotics of uncomplicated compression fractures of vertebral bodies is presented. The sensitivities of MRI and spondylography in the diagnosis of compression fractures of vertebral bodies were 100 and 62.5%, respectively.

Radioisotopes were used to study the water spaces of the bone and bone marrow in 47 dogs with a created model of acute osteomyelitis. By the 3rd-5th day of experimental osteomyelitis sharp hyperhydration of the bone marrow and bone proper was revealed which was caused by a 2.5-2.8-fold increase of the volume of intercellular fluid in the zone of the affection, leading to circulatory disorders and necrosis. Dehydration of the tissues is accomplished by inflicting numerous percutaneous osteoperforations (NPO) with Kirschner's wire. The osteoperforations are made not at random but in a regular manner through both walls of the bone in two interperpendicular planes. Circulation in the zone of the affection is restored in this case and osteonecrosis in prevented. Conservative methods of treatment of acute hematogenous osteomyelitis were developed according to the stage of its development and were applied in 168 patients whose ages ranged from 20 days to 14 years; in 75% of patients who were admitted in the early stages of AHO the disease took and abrupt course. In patients with neglected forms of AHO three-fourfold infliction of NPO in the subacute stage produced a stimulating effect on reparative regeneration in the zones of osteonecrosis and the forming sequestra.

Examinations of 70 patients with keeled deformation of the chest (KDC) have revealed signs of connective tissue dysplasia in all the examinees, as well as heart rhythm and conduction disorders. Echography has shown ventricular and atrial septal defects, mitral valve prolapse, dilatation of the aortic root, tricuspidal valve prolapse, abnormally located chorda. The development of KDC in the presence of external connective tissue stigmata, involvement of the cardiovascular system, changed dermatoglyphic pattern of the palms and fingers (as evidenced by dermatoglyphic analysis), as well as findings of histologic examinations of the cartilage removed in the course of thoracoplasty may indicate a generalized abnormality of the connective tissue in this patient population and KDC may be regarded as one of its manifestations.

The authors discuss their experience in the use of a biopolymeric composition of a biological glue KL-3 and an antiseptic for preoperative filling of bronchiectatic cavities in 28 patients with bronchiectases. The filling is performed before the operation during bronchoscopy conducted under anaesthesia. As a result endobronchitis is relieved, the time needed for preoperative management is shortened, and the number of possible postoperative complications is reduced to minimum.