Abstract: The instrumentation comprises two separate similar parts, namely a right part (1) and a left part (2), each formed by a cervical rod (3) having asperities and an elongate occipital plate (5) forming one piece with the rod and extending it toward the occiput (6) in the position of use, and adjustable means for anchoring the rod to the vertebrae and the plate to the occiput. Each part is so preangulated and shaped as to be adapted to the anatomy of the occipito-cervical connection. Each rod (3) has two rectilinear sections making therebetween an angle of between about 70.degree. and 90.degree., one of the sections being connected to the occipital plate (5), which is bent so as to correspond to the curvature of the occipital shell. The invention permits conveniently adapting the distance between the rods (3) to the anatomy of the patient and reduces the overall size of the instrumentation, which enables projections under the skin of the occiput to be considerably reduced.

Abstract: Forceps with two pin-connected branches are provided with gripping noses on one end for manipulating surgical implants. The branches are spring biased apart but include a cap at the end remote from the gripping nose which is adapted to tilt and releasably retain the ends of the branches together beneath the cap. One of the branches is fixed within the cap while the other is insertable beneath the cap and has rounded edges to facilitate its insertion and removal. The tilting motion of the cap allows for temporary access of the inserted branch when it is desired to lock the branches together during manipulation of a gripped implant or the like.