A plug connection for jaw stump models

A plug connection for jaw stump models for the releasable connection of tooth crown segments or jaw segments to a model base comprises a plug pin (1), which can be connected in snap-locking fashion with a sleeve. A non rotationally symmetrical design of a rotational locking section (4) and a cross pin (7) arranged perpendicular to the plug pin axis prevent a rotary movement of the plug pin (1) in the sleeve. Disposed at the end of the plug pin (1) facing the sleeve is a spring element (8), which comprises a circumferential annular groove (11) for snap-locking connection with the sleeve. The spring element (8) comprises two spring tongues (10) separated by a continuous longitudinal slot (9). The sleeve provided for receiving the plug pin (1) comprises a projection projecting into the inner chamber for the snap-locking connection of the plug pin (1) with the sleeve as well as a sleeve opening region matching the rotational locking section (4) of the plug pin (1).