Abstract: The invention relates to medical element and a method for securing the medical element in an implant, where the medical element has a connecting pin which is received in a receiving recess of the implant, the pin having a projection on at least one wing of a clip element and movable transversally relative to the longitudinal extension and brought into engagement with a radially outwardly facing corresponding depression in a jacket surface of the receiving recess such that the wing is subsequently secured against radial movement by hardening of a curable compound in the receiving recess.

Abstract: A method is disclosed for receiving a medical element in a manipulation apparatus in such a way that it can be inserted in an implant or be removed therefrom and the medical element is secured against longitudinal displacement by means of clip element, whereby a security element is introduced into the clip element such that the clip element is spread or blocked perpendicular to the longitudinal axis.

Abstract: In the preparation of a dental appliance wherein an investment compound is mixed with a liquid and then cast, the improvement wherein the investment compound is a plaster- or phosphate-bound investment compound which is free of an anionic surface-active agent and containing an iso-paraffin of the formula ##STR1## in which n denotes 2, 3, 4 or 5.