CLEMENT CHAROSKY,CHRISTOPHER J. DEWALD,POUL MARTIN GEHRCHEN,PIERRE ROUSSOULY,CLEMENT SILVESTRE,PHILIPPE VINCENT-PRESTIGIACOMO,CHAROSKY, CLEMENT,DEWALD, CHRISTOPHER J.,GEHRCHEN, POUL MARTIN,ROUSSOULY, PIERRE,SILVESTRE, CLEMENT,VINCENT-PRESTIGIACOMO, PHILIPPE
申请号：
FR1754287
公开号：
FR3066380A1
申请日:
2017.05.16
申请国别(地区):
FR
年份:
2018
代理人:
摘要：
Polyaxial bone screw (1) for an osteosynthesis device for connecting a longitudinal rod (2) and a bone (3) of a patient, comprising a threaded rectilinear lower part (4), a head (5) presenting at least locally a spherical shape having a radius of curvature (r) and whose upper surface is intended to come into contact with said longitudinal rod (2), a tulip (7) threaded internally in its upper part, having a space (8) for serving as a receptacle for the rod (2), and a threaded plug (11) closing said tulip (7) after insertion of the rod (2) and pressing the rod (2) against the head (5) by clamping, the lower part of said tulip (7) having an interior space (16) whose wall has a surface (17) allowing rotation of the head (5) in said space (16), characterized in that said surface (17) of the wall allowing rotation of the head (5) is interrupted before reaching the e lower edge (15) of the tulip (7), that is formed permanently, in the lower part of the space (16), a space (18) between said wall and at least a portion of the head (5), and in that the respective shapes of the head (5) of the screw (1) and the surface (17) are designed so that the pressure exerted by the rod (2) on the head (5) ) when tightening the plug (11) brings the screw (1) in a position perpendicular to the longitudinal rod (2) in the sagittal plane, while maintaining a polyaxiality of the screw (1) in the transverse plane. Osteosynthesis device comprising at least one such screw (1) and a rod (2). Vis osseuse polyaxiale (1) pour dispositif d'ostéosynthèse destiné à relier une tige longitudinale (2) et un os (3) d'un patient, comportant une partie inférieure (4) rectiligne filetée, une tête (5) présentant au moins localement une forme sphérique possédant un rayon de courbure (r) et dont la surface supérieure est destinée à venir au contact de ladite tige longitudinale (2), une tulipe (7) filetée intérieurement dans sa partie supérieure, présentant un espace (8) destiné à servir de réceptacle à
