Spinal fixation devices of improved strength and rigidity

A - Human Necessities – 61 – B

Patent

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A61B 17/70 (2006.01)

Patent

CA 2519239

This invention relates to spinal implants of improved strength and rigidity. One embodiment relates to U-shaped, top loading spinal rod receivers (10) wherein the threading (14) on the receiver ends above the top of the rod when the rod is in the locked positions. Other embodiments relate to improved thread designs based on minimizing the gap between the minor diameter of the receiver and the minor diameter of the securing member and by ensuring an equal or substantially equal number of full width threads on each of the flanges of the U-shaped receiver.

La présente invention concerne des implants rachidiens de meilleures résistance et rigidité. Un mode de réalisation concerne des receveurs pour broches rachidiennes en U à chargement par le dessus (10) et dont le filetage (14) du receveur se termine au-dessus de la broche lorsqu'elle est dans l'une des positions de verrouillage. D'autres modes de réalisation se rapportent à des modèles améliorés de filetage, l'essentiel de l'amélioration étant une minimisation de l'intervalle entre le diamètre mineur du receveur et le diamètre mineur de l'organe de blocage, garantissant un nombre égal ou sensiblement égal de filets en pleine largeur sur chacune des flasques du receveur en U.

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