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US 5,306,310 AGranted
Vertebral prosthesis
AssigneeMAN Ceramics GmbH
InventorWolfgang Siebels
Life of this patent
Estimating the term…
Abstract
A prosthesis as a vertebral replacement element consists of two helical strands, which may are screwed together to form a tubular structure. The implant is inserted between vertebrae and then slightly unscrewed until the desired height is reached. The helical strands consist of carbon fiber reinforced composite material.
Claims8
An implantable vertebral prosthesis configured to be inserted between adjacent vertebrae comprising:
- a biocompatible tubular structure with a hollow interior space having a variable length, said tubular structure being formed from two helical springs having substantially equal diameters, said helical springs being connected to each other by screwing one of said helical springs into the other of said helical springs, whereby said length of said tubular structure may be adjusted to a final intermediate distance between the vertebrae by screwing or unscrewing said two helical springs.
Dependencies are inferred from the claim text.