Insertion instrument for cervical prostheses

Abstract

Insertion instrument for a multi-part intervertebral endoprosthesis ( 9 ) which comprises two closure plates ( 91, 92 ) and a sliding core ( 93 ) arranged between these, said insertion instrument having a handgrip part ( 21, 31 ), gripping members which hold the closure plates between them, and a force-receiving part for applying an insertion force to the intervertebral endoprosthesis ( 9 ), the gripping members being guided movably toward and away from one another via a hinge ( 4 ) and being able to be tensioned against the intervertebral endoprosthesis ( 9 ), projections ( 51, 52 ) pointing in the tensioning direction ( 12 ) or recesses for holding the intervertebral endoprosthesis ( 9 ) with form-fit being provided on the gripping members, and a block ( 61 ) guided in the longitudinal axis direction ( 10 ) and with an abutment surface ( 62 ) being provided which can be moved by means of an actuating device ( 7 ) so as to bear on the intervertebral endoprosthesis ( 9 ) and, in its forward position, secures the intervertebral endoprosthesis ( 9 ) against the projections ( 51 52 ) or recesses.

1 . An insertion instrument for a multi-part intervertebral endoprosthesis comprising: 
 two closure plates and a sliding core arranged between the closure plates,    an insertion instrument comprising a handgrip part, gripping members which hold the closure plates between them a hinge, a force-receiving part for applying an insertion force to the intervertebral endoprosthesis, projections pointing in a tensioning direction or recesses for holding the intervertebral endoprosthesis with a form-fit formed on the gripping members, and a block guided in the longitudinal axis direction and provided with an abutment surface ( 62 ) is provided which configured to be movable by an actuating device so as to bear on the intervertebral endoprosthesis and, in a forward position, so as to secure the intervertebral endoprosthesis against the projections or recesses,    wherein the gripping members are configured to be guided movably toward and away from one another via the hinge and to be tensioned against the intervertebral endoprosthesis.    
     
     
         2 . The insertion instrument according to  claim 1 , wherein the insertion instrument is designed as a forceps, whose jaw parts form the gripping parts.  
     
     
         3 . Insertion The insertion instrument according to  claim 1  or  2 , wherein the actuating device is a rod with a handle arranged in the rear area of the handgrip part.  
     
     
         4 . The insertion instrument according to  claim 3 , wherein the rod is provided with a screw thread and is guided in a counter thread which is fixed on the instrument and arranged in the hinge.  
     
     
         5 . The insertion instrument according to  claim 2 , wherein the actuating device is guided through the hinge.  
     
     
         6 . The insertion instrument according to  claim 1  or  2 , wherein the handle is designed as a strike head.  
     
     
         7 . The insertion instrument according to  claim 1  or  2 , further comprising a locking device provided for securing the handgrip parts in the position when pressed together, the locking device having a guide for the actuating device.  
     
     
         8 . The insertion instrument according to  claim 1  or  2 , wherein the projections are arranged on jaw inserts which are fastened releasably on the jaw parts.  
     
     
         9 . The insertion instrument according to  claim 7 , wherein the actuating device is a rod with a handle arranged in the rear area of the handgrip part.  
     
     
         10 . The insertion instrument according to  claim 8 , wherein the actuating device is a rod with a handle arranged in the rear area of the handgrip part.  
     
     
         11 . The insertion instrument according to  claim 4 , further comprising a locking device provided for securing the handgrip parts in the position when pressed together, the locking device having a guide for the actuating device.  
     
     
         12 . The insertion instrument according to  claim 8 , further comprising a locking device provided for securing the handgrip parts in the position when pressed together, the locking device having a guide for the actuating device.