Height-adjustable artificial vertebral body
First Claim
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1. An adjustable substitute vertebra comprising:
- a sleeve-shaped central member having a first end, a second end, a left-handed thread provided on said central member adjacent said first end and a right-handed thread provided on said central member adjacent said second end,a cylindrical first member having a wall, a plurality of apertures provided in said wall, a thread for screwing said first member onto said left-handed thread on said central member at one side thereof, the other side of said first member forming a free end which comprises a plurality of teeth,a cylindrical second member having a wall, a plurality of apertures provided in said wall, a thread for screwing said second member onto said right-handed thread on said central member at one side thereof, the other side of said second member forming a free end which comprises a plurality of teeth,said first and second member being made from titanium sheet material or titanium tube material,said cylindrical first member further comprising a plurality of V-shaped apertures at its free end to define said plurality of teeth, andsaid cylindrical second member further comprising a plurality of V-shaped apertures at its free end to define said plurality of teeth.
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Abstract
A substitute vertebra with adjustable height is provided with a sleeve-shaped central part (1) having a wall with a plurality of apertures (5, 6), the central part comprising a left-handed thread adjacent to its first edge and a right-handed thread adjacent to its second edge. A cylindrical first part (7) is connected with the one threaded portion through a corresponding thread and a cylindrical second part (9) is connected to the other threaded portion through a corresponding thread. Both parts (7, 9) also have walls with a plurality of apertures (8). The two parts (7, 9) both have a plurality of teeth (8) provided at their free edges.
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Citations
10 Claims
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1. An adjustable substitute vertebra comprising:
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a sleeve-shaped central member having a first end, a second end, a left-handed thread provided on said central member adjacent said first end and a right-handed thread provided on said central member adjacent said second end, a cylindrical first member having a wall, a plurality of apertures provided in said wall, a thread for screwing said first member onto said left-handed thread on said central member at one side thereof, the other side of said first member forming a free end which comprises a plurality of teeth, a cylindrical second member having a wall, a plurality of apertures provided in said wall, a thread for screwing said second member onto said right-handed thread on said central member at one side thereof, the other side of said second member forming a free end which comprises a plurality of teeth, said first and second member being made from titanium sheet material or titanium tube material, said cylindrical first member further comprising a plurality of V-shaped apertures at its free end to define said plurality of teeth, and said cylindrical second member further comprising a plurality of V-shaped apertures at its free end to define said plurality of teeth. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification