METHOD FOR BRACKETS POSITIONING AT ORTODONTIC TREATMENT OF DENTAL SYSTEM ANOMALIES Russian patent published in 2017 - IPC A61C7/14 

FIELD: medicine.

SUBSTANCE: before orthopantomogram performance at the stage of patient examination, a bond is applied preliminary on the dry surfaces of each tooth from the vestibular side of the tooth. Then, thin wire guides with a diameter of 0.1-0.3 mm are laid on the vestibular tooth surface, so that they coincide with the assumed longitudinal axis of the tooth. Bond polymerization in the area of each tooth is performed to temporarily fix the wire guides to the tooth surface. An orthopantomogram is performed, and the accuracy of teeth longitudinal axes determination is evaluated based thereon. If the fixed wire guides and teeth longitudinal axes do not coincide, the angle of deflection of the wire guide from the tooth longitudinal axis is measured, the angle of deflection between the wire guide and the tooth longitudinal axis is measured, and the distance between the sides of the deflection angle is measured in millimeters in the region of the tooth neck in accordance with the size of the tooth crown. Corrections are made to fix the wire guides, moving their gingival part to the required value. After that, impressions are taken from the patient's jaws and diagnostic plaster models are produced that have precise orientations of the wire guides to determine the teeth longitudinal axes. A platform is prepared on the obtained plaster model for brackets fixation, cutting off guide prints in the area of the crown middle and keeping them in the area of the gingival and occlusal edges to guide the direction of the teeth longitudinal axis. Then brackets are fixed to the plaster models, so that the bracket longitudinal axis coincides with the direction of the wire guides prints. After that, mouthguards are made with brackets located therein, which are fixed in the oral cavity according to the standard procedure.

EFFECT: due to precise determination of the tooth longitudinal axis, the method, allows to reduce the number of errors in bracket system fixation, the number of position adjustments of brackets and various compensatory bends at the final stages of treatment.

4 cl, 7 dwg, 3 ex