A method is provided, including positioning a tissue anchor along an annulus of a patients valve. The anchor includes a distal tissue coupling element including (1) a pointed tip to puncture tissue of the annulus, and (2) a longitudinal element extending proximally from the distal tissue coupling element and including an implant-restraining element at a proximal end of the longitudinal element. The tissue coupling element couples the anchor to the patients tissue. The method includes restraining a valve-repair implant from separating from the annulus by the implant-restraining element, by, subsequently to the positioning of the anchor, facilitating movement between (1) the implant, and (2) the longitudinal element of the anchor, such that the implant-restraining element extends around at least a portion of the implant. The longitudinal element facilitates sliding between the implant and the tissue anchor. Other applications of the present invention are also described.
