Secondary part for securing an impression cap (72) releasably on a tooth implant (10). The secondary part (40) is secured on the latter by means of a screw connection. The secondary part (40) has elastically deformable spring fingers (44) that cooperate with a wall (76) of the impression cap (72). The wall (76) is dimensionally stable. With a good fit of the impression cap, the device can thus have a slender configuration, such that it is also suitable in particular for use in the front area of the lower jaw.