METHOD FOR DETERMINING UPPER JAW ROTATION IN HORIZONTAL PLANE RELATIVE TO THE BASE OF THE SKULL ON COMPUTER TOMOGRAMS Russian patent published in 2021 - IPC A61C7/00 A61B5/107 A61B6/14 

Abstract RU 2743068 C1

FIELD: medicine/orthodontics.

SUBSTANCE: invention relates to medicine, namely to orthopedic dentistry and orthodontics, and can be used to determine the rotation of the upper jaw in the horizontal plane relative to the base of the skull on computed tomograms. On the previously performed volumetric computed tomograms of the skull in the chin-parietal projection, cephalometric landmarks are applied relative to the base of the skull. First, they should determine the location of the lowest points on the mastoid processes and designate them with points Md on the right and Ms on the left. Through the points obtained, line A of the base of the skull is drawn. The middle of the MdMs segment is designated by the point O, through which the perpendicular S is drawn to the MdMs segment, which determines the position of the mid-sagittal plane of the skull. Further, points Fd and Fs are marked in the region of the maxillary-pterygoid notches. A line B is drawn through the obtained points in the projection of the plane of the upper jaw. From points Md and Ms, perpendiculars are drawn to line B, the intersection points are designated by point C on the right and D on the left. Then, the length of the segments CMd and DMs is measured and the internal angles β and β1 formed at the intersection of the line S and line B are measured. The rotation of the upper jaw is determined by the readings of the internal angle having the smallest value located on the side of the segment CMd or DMs.

EFFECT: method improves accuracy of determining the position of the upper jaw relative to the base of the skull.

1 cl, 2 dwg

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Authors

Vologina Mariya Viktorovna

Dorozhkina Ekaterina Gennadevna

Ivanov Nikita Aleksandrovich

Ivanova Olga Pavlovna

Mikhalchenko Dmitrij Valerevich

Dates

2021-02-15Published

2019-11-13Filed