KNEE PROSTHESIS PLACEMENT ASSISTANCE DEVICE, DISTRACTOR TOOL AND BALANCER OF THE KNEE LIGAMENTARY SYSTEM

摘要

Device for assisting the placement of a knee prosthesis comprising: - a column (6) extended orthogonally by a plate (5) having a lower face of tibial support, the column (6) being graduated from said bearing face; - a first slide (7) slidably mounted around the column (6), and comprising an axis (7a) extending parallel to the plate (5), and a rocker (8) mounted to pivot around the axis (7a) , the balance (8) comprising two pads (4) in opposition to the plate (5) and having upper condylar bearing surfaces, the balance (8) and the first slide (7) include marks (12) indicating the 'angle of rotation of the balance (8) relative to the first slide (7) from a position in which the pads (4) are parallel to the plate (5), the first slide (7) forming a cursor indicating on the graduation of the column (6) the spacing between the bearing face of the plate (5) and the bearing surfaces of the pads (4); - a second slider (21) slidably mounted around the first slider (7) and comprising a feeler (24) parallel to the plate (5) and having one end intended to bear on the anterior cortex of the femur, the first slider (7) ) is graduated from the bearing surface of the pads (4), and the second slide (21) forms a cursor indicating on said graduation the distance between the bearing surfaces of the pads (4) and the end of the probe (24) corresponding to the size of the condyle of the femur; - locking means (14) of the first slide (7) on the column (6); - locking means (23) of the second slide (21) on the first slide (7); - Means (11) for locking the balance (8) in rotation; - Means (15) for sliding the first slide (7).