Medical device, apparatus, and surgical method

摘要

A pedicle anchor device is equipped for being used like a pedicle screw, i.e. for being implanted in the vertebra from dorsal direction (but generally at an angle to the sagittal plane, slightly inward towards the sagittal plane) through the pedicle so that a distal portion of the device protrudes into the vertebral body. The pedicle anchor device includes a pedicle anchor device body with a head portion, a shaft portion and a longitudinal bore that extends from a proximal end of the pedicle anchor device body and has a hole or a plurality of holes from the longitudinal bore outward, for example radially outward.

主权项

1. An anchor device for being implanted in a human or animal hard tissue, the anchor device comprising:
a device body with a proximal head portion, and with a distal shaft portion extending from the head portion to a distal end of the device, the shaft portion being capable of being anchored in the hard tissue, the device body further comprising a longitudinal bore extending distally from a proximal end and at least two holes from the longitudinal bore outward, the anchor device further comprising a liquefiable element that is insertable or inserted in the longitudinal bore and at least partly liquefiable by the impact of energy impinging from the proximal side so that liquefied material flows through the at least two holes and out of the longitudinal bore into structures of the hard tissue and/or hard tissue replacement material, wherein the shaft portion is not threaded and has a non-circular cross section, wherein at least a portion of the shaft portion is flat defining two flat sides, wherein the shaft portion is helically twisted with a twist of between 10° and 270° over an entire length of the shaft portion, and wherein one of the holes is arranged in each flat side.