METHOD FOR MARKING PLASTER MODELS OF JAWS WITH COMPLETELY ABSENT DENTITION Russian patent published in 2019 - IPC A61C13/00 

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to dentistry, and can be used for marking plaster models of the jaws in completely absent dentition. Determine the deepest point behind the maxillary tubercle on the gypsum model and designate fs on the left and fd on the right. Measure the fs-fd segment and find its middle. From the middle of the segment fs-fd, the perpendicular ON is lowered, which corresponds to the mid-sagittal line. Point of intersection of the perpendicular and the fs-fd segment is marked with a point O. Vertical continuation of the ON line on the front surface of the gypsum model is marked as LH. Next, divide the length of the segment fs-fd by the number 8.0 and the resulting value lay on the ON line from point O vertically upwards and get the segment OP. Through the point P draw a line parallel to the segment fs-fd. Obtained line AB corresponds to the position of artificial molars on the prosthesis. Horizontal continuation of the AB line to the lateral surfaces of the gypsum model as the TM on the left and JU on the right is noted. Next, calculate the parameters for finding the segment PK by measuring in millimeters the parameters: the width of the nose between the protruding points on the wings of the nose (AnAn), face width between the zygomatic points (ZyZy), the distance between the points on the ear trestle (TT) and the distance from the point on the ear trestle to the tray-carrying point (TSn). Value of the segment PK is determined by the stated formula. Calculated value of the segment PK is laid on the line ON from point P. Through the point K draw a line parallel to the segment fs-fd. Resulting CD line will correspond to the position of the artificial canines on the prosthesis. Note the horizontal continuation of the CD line to the side surfaces of the gypsum model as ZY on the left and GQ on the right.

EFFECT: method allows accurate marking of the plaster model to determine the position of artificial canines and second permanent molars at the stages of prosthetics in the complete absence of teeth by determining the most significant points on the plaster model and estimating the most significant parameters.

1 cl, 3 dwg