Device for the cement augmentation of bone implants

摘要

A device for cement augmentation of bone implants that includes a hollow cylinder having an inner diameter, an outer diameter and a longitudinal axis. The hollow cylinder includes an inner cavity, a front end configured and adapted for insertion into a bone, a rear end having a bore hole in communication with the inner cavity, and a shell having at least one perforation. The device also includes a bone implant insertable into the hollow cylinder. The hollow cylinder is adapted and configured to receive unhardened bone cement through the bore hole into the inner cavity.

主权项

1. A device for cement augmentation of the bone implants, the device comprising:
a hollow cylinder including a shell and defining a closed front end configured to be inserted into bone, an opposed open rear end that includes an inner surface defining a bore hole, and an inner cavity that is in communication with the bore hole, the shell defining a plurality of perforations that extend through the shell in communication with the inner cavity; a bone implant having a length so as to define a proximal end and an opposed distal end, the bone implant having an exterior thread that extends from the distal end toward the proximal end along a portion of the length, the exterior thread of the bone implant configured to mate with the inner surface of the hollow cylinder to thereby advance the portion of the bone implant having the exterior thread into the hollow cylinder as the bone implant is rotated with respect to the hollow cylinder; and unhardened bone cement wherein (i) the hollow cylinder received the unhardened bone cement in the inner cavity, and (ii) the length of the bone implant is sufficient to extend within a majority of the cavity such that the distal end of the bone implant presses against the bone cement as the bone implant advances into the hollow cylinder, and the perforations are sized such that the pressed bone cement is driven through the perforations, wherein the hollow cylinder has a length and the perforations have a maximum distance to the front end of the shell that is equal to approximately the length of the hollow cylinder/2.