CPC A61B 17/7037 (2013.01) [A61B 17/704 (2013.01); A61B 17/7038 (2013.01); A61B 17/7041 (2013.01); A61B 17/7032 (2013.01)] | 18 Claims |
1. A spinal system, comprising:
at least a first bone anchor having a proximal head and a distal shaft configured to engage bone, the proximal head having a spherical shape with opposed first and second non-spherical side portions;
at least a first receiving member being configured to receive the first bone anchor and having a proximal end and a distal end, the proximal end of the first receiving member having two spaced apart upright arms defining a recess for receiving a spinal rod therebetween, the distal end of the at least a first receiving member having a bore therethrough; and
at least a first cap being configured to be seated within the first receiving member and having a proximal portion configured to seat the spinal rod, the at least a first cap configured to extend around opposed sides of the spinal rod and above a center thereof, the at least a first cap having a cavity formed in a distal portion thereof configured to at least partially receive the proximal head of the first bone anchor,
first and second restrictor elements each having a first end configured to be removably attached to the at least a first cap and a second end that extends distally beyond the at least a first cap, and that are complementary to and configured to receive the first and second non-spherical side portions of the at least a first bone anchor;
wherein when the first bone anchor is received in the cavity of the at least a first cap, the first and second restrictor elements engage with at least a portion of the first and second non-spherical side portions of the proximal head to restrict movement of the first bone anchor relative to the at least a first cap in a direction toward and away from the side portions of the at least a first cap.
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