Bone fixation element

Details Bone fixation element Bone fixation element

A - Human Necessities

61

B

A61B 17/86 (2006.01) A61F 2/44 (2006.01) A61F 2/00 (2006.01) A61F 2/30 (2006.01)

Patent

CA 2491123

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.

L'invention concerne un élément de fixation pour os (1) composé d'un cylindre creux (2), dont l'enveloppe (4) est pourvue de n perforations (3), ce cylindre étant doté d'une extrémité (5) ouverte antérieure, conçue pour être introduite dans l'os, d'une extrémité postérieure (6) et d'un axe longitudinal (7). La rigidité du cylindre creux (2) diminue le long de son axe longitudinal (7) de l'extrémité postérieure (6) vers l'extrémité antérieure (5). De par sa conception, cet élément de fixation pour os (1) satisfait aux exigences de rigidité adaptée et assure ainsi un ancrage à long terme dans l'os, notamment dans un os ostéoporeux, tout en respectant les conditions biologiques environnantes.

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