Fully implantable bone expansion device
OwnerHans Sachseinventor
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Abstract
This invention describes a bone lengthening device, which is fully implantable and works on a cylinder and piston basis which is driven with micro-hydraulics or a internal threaded rod. Choosing a profile which is not round, torsion of the cylinder and piston assembly is avoided, and expansion can be achieved both in a linear as well as in a circular fashion. Since this device is fully implantable, common disadvantages with current methods of bone expansion can be eliminated.
Claims13
A device for expansion and fixation of two bone segments, consistent of a cylinder and a piston which cylinder has a fixation mechanism at both ends to attach these to the bone segments, and produced from biologically tolerated and compatible materials, wherefor the entire device can be implanted in the soft tissues wherein the cylinder has a round internal diameter, wherein the interior surface has a longitudinal bar and the piston an accompanying gap, thus eliminating rotation between the piston and cylinder assembly.
A device with a cylinder with a round internal diameter, wherein the interior surface has a longitudinal bar and the piston an according gap, thus eliminating rotation between the piston and cylinder assembly.
Dependencies are inferred from the claim text.