TOTAL DISC REPLACEMENT DEVICE

摘要

A total disc replacement device (1) with a central axis (13) comprising A) a first apposition member (2) with an apposition surface (7) and an intermediate surface (8) both being arranged transversely to said central axis (13); B) a second apposition member (3) with an apposition surface (9) and an intermediate surface (10); said intermediate surfaces (8; 10) of said first and second apposition members (2; 3) facing each other; the device further comprising C) an elastic spacer (4) disposed between said intermediate surfaces (8; 10) of said first and second apposition members (2; 3); whereby D) said intermediate surface (8) of said first apposition member (2) is provided with first rigid constraint means (22) and said intermediate surface (10) of said second apposition member (3) is provided with second rigid constraint means (23) interfering with said first constraint means (22) and being configured such that a gap (21 ) with a width W > 0 is provided at least transversely to the central axis (13) between said first and second constraint means (22; 23) in the unloaded state of the total disc replacement device (1).