FIELD: medicine.;SUBSTANCE: invention relates to medicine, dentistry, is intended to determine the levels of the location of the retracted teeth of the frontal section (incisors, canines of the upper jaw) with a cone-beam computed tomogram (CBCT). After CBCT on the sagittal plane of the tomogram, two horizontal lines are drawn: one through the points Spina nasalis anterior (Sna) and Spina nasalis posterior (Snp), another through the apical basis of the upper jaw. Vertical distance between these lines is divided into three equal parts and horizontal lines – levels are drawn through the obtained points. First level of the teeth is located between the two lower lines, the third – between the top two, the second – in the middle. Vertical distances between the horizontal lines correspond to the size of the crown of an impacted tooth. To determine the levels and carry out measurements, the obtained X-ray image in three planes is displayed on the computer monitor screen: coronary, axial, sagittal, and also a three-dimensional image. In the window of each slice, a rectangular coordinate system X, Y and Z is drawn, with which three-dimensional measurements are performed on the three-dimensional image. Measurement of the axis of inclination of the lamellar tooth of the patient is carried out by constructing an angle, one side of which is the median axis of the lined tooth, and the second is a line drawn parallel to the horizontal axis of the rectangular coordinate system in the sagittal plane and parallel to the vertical axis of the coordinate system in the coronary and axial planes. Based on the measurement results, the level of position and inclination of the lamellar tooth is diagnosed.;EFFECT: method provides accurate determination of the topography of the retained tooth, the formation of a fundamentally new approach to orthodontic treatment of the retention of the teeth, the unerring choice of the surgical technique, the topographic guide for exposing the crown of the retained tooth.;1 cl, 8 dwg, 1 ex
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机译：技术领域本发明涉及牙科医学，其目的在于利用锥形束计算机断层摄影术（CBCT）确定额部（门牙，上颌犬齿）的缩回牙齿的位置水平。 。在断层图的矢状面上进行CBCT后，绘制了两条水平线：一条穿过鼻前棘（Sna）和鼻后棘（Snp），另一根穿过上颚的根尖。这些线之间的垂直距离分为三个相等的部分，水平线–通过获得的点绘制级别。牙齿的第一层位于下部的两条线之间，第三层位于顶部的两条线之间，第二层位于中间。水平线之间的垂直距离对应于受影响牙齿的牙冠尺寸。为了确定水平并进行测量，将在三个平面上获得的X射线图像显示在计算机监视器屏幕上：冠状，轴向，矢状以及三维图像。在每个切片的窗口中，绘制了直角坐标系X，Y和Z，利用该坐标系对三维图像进行三维测量。通过构造一个角度来测量患者的片状牙齿的倾斜轴，该角度的一侧是衬里牙齿的中轴线，第二个是平行于直角坐标的水平轴绘制的线矢状平面中的坐标系统，并平行于冠状和轴向平面中的坐标系统的垂直轴。根据测量结果，可诊断出片状牙齿的位置和倾斜度。效果：该方法可准确确定保留牙的形貌，形成了从根本上进行正畸治疗牙齿固位的新方法，外科技术的正确选择，用于露出固位牙冠的地形指导。; 1 cl，8 dwg，1 ex
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