FIELD: medicine.
SUBSTANCE: invention refers to medicine, namely to dentistry, and is intended for use in occlusion correction. At the first stage, 3D scanning of the oral cavity is carried out; the obtained data are loaded into a CAD/CAM program. Jaw extension is set in CAD/CAM program. Further, the dental arch is expanded on the lower, and then on the upper jaw. Further, the position of the dental arch of the upper jaw is aligned with the position of the dental arch of the lower jaw to obtain planned 3D model of the jaw. At the second stage, the design of planned 3D model of the jaw with orthodontic elements is simulated, for which, first, a bead is placed on the upper jaw between the central incisors to correct the parafunction of the tongue, then on the lower jaw, starting from teeth 44, 34, following the canines, overlapping two subsequent teeth, tongue guides are installed to obstruct the position of the tongue on the lower jaw and to direct it to the bead to correct the parafunction of the tongue on the upper jaw. Width of the tongue guides is selected so that a place for the tongue is preserved when wearing the orthodontic activator. Then, buccal pilots with thickness of 0.55 mm are placed on the outer surface of the lower jaw to move the cheek away from planned 3D model of the jaw. Then, trapezoidal guides are placed on the lateral portions of the upper and lower jaws, on the external surface, to act on the lower jaw. At that, trapezoidal guides of upper jaw are located in relation to trapezoidal guides of lower jaw with gap making sum of thicknesses of upper and lower trays of orthodontic activator, at that, the width of the trapezoidal guides on the lower jaw is selected so that to cover the entire tooth, starting from which they are located and a half of the adjacent tooth, and the width of the lower base of the trapezoidal guides on the upper jaw so as not to exceed the width of the lower base of the trapezoidal guides on the lower jaw, the width of the gap between the trapezoidal guides and the jaws is equal to the sum of the thicknesses of the upper and lower trays of the orthodontic activator; the height of the trapezoidal guides is chosen so that to overlap the necks of the teeth opposite to which they are installed. Angle of deviation of the trapezoidal guides is modelled so that the lower and upper trays of the orthodontic activator fit between them. At the third stage, the structure of planned 3D model of the jaw with orthodontic elements, obtained at the second stage, is sent for printing to 3D printer. At the fourth stage, 3D model of the jaw with orthodontic elements printed at the third stage is squeezed by upper and lower trays from a biocompatible material on a thermal vacuum moulder.
EFFECT: method by making an orthodontic activator, including a lower and upper trays, made within the same compression, taking into account the effect of the orthodontic elements installed on the trays, allows creating optimal stresses in the tray structure sufficient for the specified correction of the upper and lower jaw position and correction of the parafunction of the tongue.
5 cl, 16 dwg
