Patent ID: 7909870
Filing Date: 2011-03-22
Classification: A61F

Abstract:
1. A height-adjustable implant for insertion between vertebral bodies, the implant comprising: a first sleeve part having an internal thread; a second sleeve part; said first and second sleeve parts: each adjacent two of said windows defining a respective circumferential section therebetween in each of said sleeve parts; said circumferential sections of each one of said sleeve parts each fitting axially displaceably into a respective one of said windows of the other of said sleeve parts and defining an inner space of the implant, at least one of said circumferential sections of said second sleeve part having an access opening formed radially therethrough; a nut disposed coaxially and circumferentially contained within said inner space and secured on said second sleeve part in a rotatable but axially fixed manner, said nut having an external thread engaging in said internal thread of said first sleeve part, said nut being secured on said second sleeve part with said external thread located outside said second sleeve part, as seen in an axial direction, said nut having an outer surface with an annular groove formed therein, said circumferential sections of said second sleeve part each have an inside face with a radially inwardly extending projection engaging in said annular groove of said nut; and a toothed ring extended coaxially relative to said central longitudinal axis and disposed on said nut partially covering said access opening and on a side of said nut facing toward said second sleeve part, said access opening configured for receiving an operating instrument which cooperates with said toothed ring.