Vertebral implant, method for the placement of such an implant and tool for the placement of the implant
AssigneesBpath, Jacques Senegas
InventorsRichard Laurent Minfelde, Jacques Senegas
Life of this patent
Estimating the term…
Abstract
The invention relates to a vertebral implant placed after a laminectomy and fixed by transfacet screws arranged in a translaminar direction. The invention also relates to a placement instrument and to a method for the placement of an implant.
Claims12
A vertebral implant comprising a first body and a second body that are hinged to each other, each one of the first body and the second body being arranged to be fastened by only one transfacet connection screw, the transfacet connection screws being attachable to opposite sides of a vertebra, each transfacet connection screw having a threaded shank provided with a partially spherical head, each body comprising both a portion for connection to the other body and also a base having a soleplate arranged to face towards a portion of vertebra that has been exposed by laminectomy, the base of each body being provided with a hole having a first end opening out into the soleplate and a second end that opens out at the opposite end and that is provided with a recess for receiving the head of said transfacet connection screw, the base of each body also being provided with a slot extending along the hole and opening out laterally into the hole in order to enable lateral insertion of said transfacet connection screw in the hole and the base of each body cooperating with a cover arranged to tighten the head of the screw against a shoulder of the base;
- wherein the base of each body comprises a collar provided with a thread for co-operating by screw-fastening with the cover.
A vertebral implant comprising a first body and a second body that are hinged to each other, each one of the first body and the second body being arranged to be fastened to a vertebra by only one transfacet connection screw, each transfacet connection screw having a threaded shank provided with a partially spherical head, each body comprising both a portion for connection to the other body and also a base having a soleplate arranged to face towards a portion of vertebra that has been exposed by laminectomy, the base of each body being provided with a hole having a first end opening out into the soleplate and a second end that opens out at the opposite end and that is provided with a recess for receiving the head of said transfacet connection screw, the base of each body also being provided with a slot extending along the hole and opening out laterally into the hole in order to enable lateral insertion of said transfacet connection screw in the hole and the base of each body cooperating with a cover arranged to tighten the head of the screw against a shoulder of the base, the body being arranged so that when fastened to the vertebra the first body and the second body being hinged to each other around an axis perpendicular to a front plane of the vertebra;
- wherein the base of each body comprises a collar provided with a thread for co-operating by screw-fastening with the cover.
Dependencies are inferred from the claim text.