초록 ▼

A bone plate arrangement consists of a bone plate (1), at least one bone screw (3) and a cover plate (5, 22, 30, 34, 38) which covers the head (4, 21, 26) of the bone screw and is to be screwed to the bone plate. Devices for fixing the direction of the bone screw (3) relative to the bone plate (1) a

A bone plate arrangement consists of a bone plate (1), at least one bone screw (3) and a cover plate (5, 22, 30, 34, 38) which covers the head (4, 21, 26) of the bone screw and is to be screwed to the bone plate. Devices for fixing the direction of the bone screw (3) relative to the bone plate (1) are provided. These devices consist, on the one hand, of a seat which, though indifferent with respect to direction, laterally fixes the screw head on the bone plate and, on the other hand, of a positive of frictional connection betwen the screw head and the cover plate, produced by mutual engagement of the raises and recesses. The cover plate is laterally fixed relative to the bone plate.

대표청구항 ▼

A bone plate arrangement comprising: a bone plate including at least one bone screw hole having a center line and a seat on the upper side of the bone plate opposite the lower side adapted to face the bone, said seat having an acutely narrowing profile in the direction from the upper toward the low

A bone plate arrangement comprising: a bone plate including at least one bone screw hole having a center line and a seat on the upper side of the bone plate opposite the lower side adapted to face the bone, said seat having an acutely narrowing profile in the direction from the upper toward the lower side; a bone screw having a longitudinal axis, said bone screw adapted to pass through the bone screw hole into the bone and including a bone screw head having a generally convex seating surface which is contoured such that when the bone screw is fully inserted into the bone through the hole with the axis along a selected one of a range of angular orientations relative to said center line, the seating surface of the head is supported in said seat; a cover plate including means for engaging the bone plate so that the underside of the cover plate tightly engages the screw head; and said bone screw head and the underside of the cover plate having raises and recesses which mutually engage when the cover plate tightly engages the screw head so as to hold the head in fixed lateral relation to the bone plate and prevent pivoting thereof, whereby the bone screw axis is fixed in said selected angular orientation relative to the hole centerline.