| 摘要 |
The subject matter of the present invention relates to an extendable spinal implant with a first outer sleeve and a second outer sleeve coaxially disposed thereto and an inside drive element which is connected by means of screws to at least one of the outer sleeves, with the inside drive element comprising a first thread, e.g., an outside thread, and with the outer sleeve that is connected by means of screws to the drive element comprising a second thread, e.g. an inside thread, that fits on the outside thread, with the inside drive element resting on a support ring and with the drive element being able to be driven in the area of its front surface that faces the supporting ring.
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