Bone fixation element
First Claim
1. A device for insertion in bone comprising a hollow member having a longitudinal axis, a wall, a plurality of perforations in the wall, a front end and a rear end, wherein the hollow member has a stiffness which decreases along the longitudinal axis from the rear end to the front end.
7 Assignments
0 Petitions
Accused Products
Abstract
A bone fixation element consisting of a hollow member having a wall, a plurality of perforations locating in the wall, a front end which is suited for insertion into the bone, a rear end, and a longitudinal axis. The stiffness of the hollow member may vary along its longitudinal axis from the rear end to the front end. Changes in the porosity and/or the thickness of the wall of the bone fixation element may result in changes in stiffness of the bone fixation element. An increase in porosity and/or decrease in thickness may result in a decrease in stiffness, and a decrease in porosity and/or increase in thickness may result in an increase in stiffness.
180 Citations
22 Claims
- 1. A device for insertion in bone comprising a hollow member having a longitudinal axis, a wall, a plurality of perforations in the wall, a front end and a rear end, wherein the hollow member has a stiffness which decreases along the longitudinal axis from the rear end to the front end.
- 15. A device for insertion in bone comprising a hollow cylinder having a longitudinal axis, a circumferential surface, a plurality of perforations in the circumferential surface, a front end and a rear end, wherein the hollow cylinder has a first stiffness at the front end and a second stiffness at the rear end, the first stiffness being less than second stiffness.
Specification