Augmentation

A device for preparing an opening in hard tissue and/or hard tissue replacement for implantation of an implant, the device comprising:

• a tool adapted to be coupled to an energy source,
• an augmentation element of a thermoplastic material, and
• a counter element,
• wherein a tool contact surface and a first augmentation element contact surface together form a first interface and where a second augmentation element contact surface and a counter element contact surface together form a second interface,
• wherein the device is insertable into an opening in hard tissue and/or hard tissue replacement material so that at least one of the first and the second interfaces serves as a liquefaction interface and forms part of a periphery of the device at least partially surrounded by a circumferential wall of the opening,
• wherein material of the augmentation element is, in a vicinity of the liquefaction interface, meltable when pressed against the tool contact surface by the effect of energy coupled into the tool, and
• wherein the augmentation element is meltable by the energy to an extent that the tool and the counter element may be removed to a proximal side of the opening while augmentation material of the augmentation element remains anchored in the opening.