intervertebral implant for the lumbosacral joint.

摘要

intervertebral implant for the lumbo-sacral joint, consisting of a cove or wedge (20, 120) adapted to be disposed between the fifth lumbar vertebra (L5) and the vertebra (S1) of the articulated sacrum latter, the body of said cove or wedge (21, 121) two upper end faces (22, 122) and lower (24, 124) opposite the cove or wedge groove (30, 130) comprising, oriented in the mean central plane or (M, M '') Creek or wedge (20, 120), performed on the upper end face (22, 122) and being adapted to receive the spinous (10) of said lumbar vertebra (L5), and a longitudinal housing comprising (36, 136) orthogonally oriented to said slot (30, 130), practiced on the lower end face (24, 124), characterized by the fact that said longitudinal housing (36, 136) is suitable for receiving the part top (14) of the vertebra (S1) of the sacrum, so that the cove or wedge (20, 120) is capable of resting directly this top (14), and by the fact that the body of said cove or wedge having first and second opposite sides (26, 126; 28, 128), which opens said groove (30, 130), and at its lower end an extension (32, 132), which first side (32b, 132b) is in the extension of the first side face (26 , 126), and whose second side (32a, 132a) opposite the first, defines a depression with respect to the second side face (28, 128) body Creek or wedge, and by the fact that the cove or wedge (20, 120) comprises a lug or pin (34, 134) of width less than the width of the body (21, 121) Creek according to the direction orthogonal to the center or median plane (M, M ') of Creek, attached to the body of the inlet, and extending across the second side (32a, 132a) of said extension (32, 132), so that the inner face (34a, 134a) of said leg (34, 134 ), oriented opposite the second side of the extension defines with the latter side the contour of said housing (36, 136).