| 摘要 |
FIELD: medicine, dentistry. ^ SUBSTANCE: attachment consists of patrix, matrix, button spherical guide rod, elastic cap made of plastic. The upper part of the attachment rod is ball-shaped, truncated at the bottom, and gradually transforms into the rod stalk. The upper part of the outer surface of the elastic cap is made of two truncated cones and a ball segment located one above the other. The inner ball surface of the cap and its transformation band are congruent with the same surfaces of the button spherical rod. The inner surface of the cap from the transformation band is trumpet-shaped at the end. Identical rectangular shoulders are made on both sides of the patrix. The patrix has a detachable container and an elastic cap the inner surface of which is congruent with the outer surfaces of the stalk and the bearing surface of the button rod of the patrix. ^ EFFECT: improved attachment design that ensures its produceability; more secure fixation of the matrix on the patrix. ^ 4 cl, 4 dwg
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