A spinal fixation assembly using a hinged bone screw with a tulip blob connector, a variable height, hinged bone screw with a tulip bulb connector or both. The bone screws have a post section connected to a screw section by a hinge. In the basic hinged bone screw, a bulb shaped head is formed at the end of the post section opposite the hinge and a tulip bulb connector is attached to the bulb shaped head. For the variable height hinged bone screw, a collet is used with an interior bore that slides over the post section of the bone screw. The collet has a cylindrically shaped sleeve at one end and a bulb shaped head at the other end. The tulip bulb connector is attached to the bulb shaped head of the collet. In both cases, the tulip bulb connector has a cavity for receiving a connector rod and a set screw for firmly attaching said connector rod within said tulip bulb connector cavity.
