ANTERIOR OSTEOSYNTHESIS PLATE FOR LUMBAR VERTEBRAE OR SACRAL LUMBAR VERTEBRA AND INSTRUMENT FOR POSITIONING SAME

摘要

The invention concerns an anterior osteosynthesis plate for lumbar vertebrae or sacral lumbar vertebra comprising: an elongated body with the following features: adapted to cover the anterior part of two consecutive vertebrae; having an anterior surface (6) and an opposite posterior surface (7); presenting two end zones linked by a connecting zone (11); and provided with two passage holes for anchoring screws. The invention is characterised in that the plate posterior surface (7) has a support plate (12, 13) designed to be urged in contact with the anterior surface of the vertebrae, the support plates (12, 13) being inclined to define between them, along a saggital plane (S), an obtuse angle ( alpha ) adapted to the relative angulation of the anterior part of the two vertebrae and mutually linked at the connecting zone by a concave extension (17), such that at least the posterior surface (7) of the body presents a concave profile in the saggital plane.