Patent ID: 7862593

Claim:
Vertebral osteosynthesis equipment, comprising: one or more bony anchoring members, at least one of said bony anchoring members comprising a proximal threaded stud, a base portion, and a holding portion, the proximal threaded stud having a first end connected to the base portion and a free second end opposed to said first end, said base portion configured to anchor to a vertebra, and said holding portion configured for holding said base portion in rotation; a linking rod; a connecting part configured to engage with said proximal threaded stud of said at least one of said anchoring members, and further configured to connect to said linking rod thereby to connect said linking rod to said at least one of said anchoring members; a nut configured to engage in threaded engagement with said proximal threaded stud to secure said connecting part, said nut configured to cooperate with the proximal threaded stud to secure said connecting part at said first end; and at least one extension piece having a head portion and an end distal portion opposed to said head portion, said end distal portion configured to connect to said free second end of said proximal threaded stud and to slidingly receive said connecting part from the head portion to the end distal portion such that said connecting part may engage upon said proximal threaded stud, the head portion of the extension piece comprising a flexible structure configured to be positioned askew to a direction of extension of the extension piece, wherein each of said head portion and said end distal portion have an outermost external diameter configured such that the nut, in coaxial engagement with said extension piece, slides freely over an entire length of said extension piece, wherein said free second end of said proximal threaded stud has a first positioning element and said end distal portion of said extension piece has a second positioning element, said first and second positioning elements configured in a first mode to removably secure to each other via threaded engagement in order to removably retain said end distal portion of said extension piece on said free second end of said proximal threaded stud, and said first and second positioning elements further configured in a non-engagement second mode to disengage from each other such that the extension piece is not mounted on said proximal threaded stud.