This article analyses the incidence of facet joint violation by pedicle screws inserted via the two most commonly used techniques, intersection and mammillary. Pedicle screws were inserted on each side of fresh-frozen human cadevaric specimen lumbosacral spines using the two techniques. All facet joints which were violated were found to be on the right side, where the mamillary process technique was employed. The incidence of facet joint violation was higher in the mammillary technique, which was statistically significant. The intersection technique appears to be safer than the mamillary with respect to violation of the adjacent superior facet joint.
Cet article analyse l’altération de la facette articulaire par la vis pédiculaire qui est habituellement introduite selon deux techniques, celle de l’intersection ou celle de la pénétration mammillaire. Les vis étaient insérées sur les deux côtés d’un specimen lombo-sacré cadavérique. Toutes les facettes articulaires atteintes étaient du côté de l’introduction mammillaire. La technique de l’intersection apparaît la plus sûre.