| 摘要 |
FIELD: medicine. ^ SUBSTANCE: method involves carrying out X-ray examination and determining longitudinal axis tilt of retained tooth and computer tomography. Maxillary computer tomography is carried out in three-dimensional Descartes coordinates with central occlusion being preliminarily fixed with individual silicon gumshield. The gumshield has 2-4 mm thick bilateral occlusion surface. Calculated free space value being found greater than thickness (vestibulo-oral size) of the retained tooth, positive prognosis for successful moving out is determined by building geometrical model, carrying out mathematical analysis of received data. The calculated free space value being found equal to retained tooth thickness, prognosis for difficult moving out is produced. The calculated free space value being found less than retained tooth thickness, unfavorable prognosis for moving out is produced. ^ EFFECT: high accuracy in predicting orthodontic correction results in three-dimensional space. ^ 18 dwg, 1 tbl |
