Apparatus and method for reducing spinal deformity

Abstract

An apparatus and method for the treatment of abnormal spinal curvature, such as, scoliosis, is disclosed. The apparatus includes a plurality of clamp sets and a single rail. The clamp set for affixing to a vertebra has a transverse plate having a center region and a first and a second end. The first end has a first pedicle extension, and the second end has a second pedicle extension. At least one pedicle extension is used to transmit a downward force during rotation of the vertebra. The clamp set also includes a first laminar hook located on the first end of the plate and is integral with the plate to hook on a superior portion of a first lamina of a vertebra. The clamp set also includes a second laminar hook to hook from an opposite direction on an inferior portion of a second lamina of the vertebra. The second hook is adjustable to allow clamping and unclamping of the clamp set. The clamp set includes a rail coupling member having a slot to receive a rail. The rail coupling member is located on the center region of the plate, and the slot is configured to accept the rail cross-sectional shape. A plurality of the clamp sets are attached along a portion of the spine, followed by adjustment and fixation of the individual clamp sets prior to attaching a rail. The rail is inserted into the slots of each clamp set to hold the clamp sets in the reduced form and in relation to one another. In one instance, the rail may have a plurality of sides.