Patent ID: 9427260
Filing Date: 2016-08-30
CPC Classification: A61B

Claim Text:
1. A closed-head polyaxial screw comprising: a set screw; a bone screw having a head; a closed head comprising an upper aperture configured to receive the set screw, a lower aperture configured to receive the bone screw, and an aperture for receiving a rod, wherein the set screw comprises a retaining lip positioned near a bottom portion of the set screw that prevents the set screw from being removed from the upper aperture as the set screw is moved upwardly through the closed head; a first clamp surrounding at least a portion of the head of the bone screw to retain the bone screw in the lower aperture of the closed head and a second clamp surrounding at least a portion of the head of the bone screw, wherein the first clamp and the second clamp are configured to be inserted upwardly into the closed head such that the first clamp and the second clamp come to a stop when the first clamp comes into contact with the second clamp; and a wedge configured to be seated onto the first clamp and the second clamp, wherein the wedge is spaced from and capable of moving with respect to the bone screw.