Spinal stabilization system
View Patent ↗A spinal stabilization system including a connecting rod and a bone screw. The connecting rod includes an elongate rounded section, an elongate head portion, and a neck portion connecting the elongate rounded section with the elongate head portion. The bone screw includes a head portion defining a slot, a shank extending longitudinally from the head portion, and a set screw configured to secure the connecting rod in the slot. The head portion includes a pair of radially opposing walls defining the slot therebetween. The head portion includes a trailing end and a leading end. The trailing end includes a guide member defining an aperture configured and dimensioned to receive the set screw therethrough. The aperture is in communication with the slot. In particular, the guide member interconnects the pair of radially opposing walls.
1. A spinal stabilization system comprising:
a connecting rod including an elongate rounded section having a circular cross-section, an elongate head portion having a non-circular cross-section, and a neck portion connecting the elongate rounded section with the elongate head portion, the connecting rod being monolithically formed: and
a bone screw including a head portion defining a slot, a shank extending longitudinally from the head portion, and a set screw configured to secure the connecting rod in the slot, the head portion including a pair of radially opposing walls defining the slot therebetween, the head portion including a trailing end and a leading end, the trailing end including a guide member defining an aperture configured and dimensioned to receive the set screw therethrough, the aperture in communication with the slot, wherein the guide member interconnects the pair of radially opposing walls wherein the guide member includes a lip extending radially inward and defining an acute angle with respect to the trailing end and wherein the trailing end defines a substantially planar surface such that set screw threadably inserted in the slot is substantially flush with trailing end.
2. The spinal stabilization system according to claim 1 , wherein the slot includes a leading end portion configured to receive the elongate rounded section of the connecting rod and a trailing end portion configured to threadably engage the set screw.
3. The spinal stabilization system according to claim 2 , wherein the leading end portion of the slot has an arcuate configuration dimensioned to accommodate the circular cross-section of the elongate rounded section of the connecting rod.
4. The spinal stabilization system according to claim 1 , wherein the slot has a U-shaped profile.
5. The spinal stabilization system according to claim 1 , wherein the pair of radially opposing walls of the head portion of the bone screw includes internal threads.
6. The spinal stabilization system according to claim 1 , wherein the guide member is configured to inhibit flexing of the pair of radially opposing walls.
7. The spinal stabilization system according to claim 1 , wherein the neck portion defines a pair of concave sides joining the elongate rounded section with the elongate head portion.