METHOD FOR CONSTRUCTING AND DISPLAYING COMPUTER 3D MODELS OF TEMPOROMANDIBULAR JOINTS Russian patent published in 2020 - IPC A61B6/03 G16H20/00 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to dentistry. Right and left temporomandibular joint (TMJ) zones are sequentially visualized in the computer tomography (CT) scanning software. In the frontal projection, each conditional TMJ is delineated into 8 equal sections from the outer to the inner edges. In the sagittal projection on the borders of the sections, separate 3D contours of the TMJ pits and condyles are created. 9 sagittal 3D contour of pits and 9 sagittal 3D contours of condyles are obtained. Further, three 3D contours in frontal projection are created for each pit TMJ. First frontal 3D contour is created in the largest depression of the fossa, second frontal 3D contour - 3 mm from the first contour, third frontal 3D contour - 3 mm from the leaf in a distal direction. Contours of the right and left condyle are combined with 3D model of dentures of the lower jaw, which has already been integrated into the CT, and complete 3D model of the lower jaw with dental rows and condyle. Obtained 3D objects: contours of the right and left pits, merged with 3D model of dental rows of upper jaw, which has already been integrated into the CT, and obtaining complete 3D model of the upper jaw with dentures and cavity pits. Further, obtained 3D scene objects are divided into six zones in the window interface, wherein the number of cells is equal to the number of the obtained contours in the sagittal and frontal projections, respectively, to the sides and symbols, and accurate tracking of the condyle movement in the TMJ pits is ensured when the lower jaw is moved.

EFFECT: method enables to create high-accuracy 3D models of condyles and pits of TMJ with thickness of contours in diameter of 100 mcm, accurately set lower jaw in therapeutic position and make all kinds of structures - crowns, inserts, lining, prostheses, splints and functional orthodontic apparatuses, avoid distortion of 3D TMJ models obtained using known methods of autosgmentation.

1 cl, 1 ex, 1 tbl, 32 dwg