1. A spinal fixation system, comprising: a bone anchor having a bone-engaging portion and a spinal fixation element receiving portion with opposed arms configured to receive a spinal fixation element therebetween; a connecting member having first and second ends with a spanning portion extending therebetween, the first end having an elongate opening extending therethrough; and a locking member configured to engage opposed inner walls of the opposed arms of the spinal fixation element receiving portion, the locking member being configured to maintain a location of a spinal fixation element with respect to the spinal fixation element receiving portion in which the spinal fixation element is disposed, and further configured to maintain a location of the connecting member with respect to the bone anchor.
1. A spinal fixation system, comprising: a bone anchor having a bone-engaging portion and a spinal fixation element receiving portion with opposed arms configured to receive a spinal fixation element therebetween; a connecting member having first and second ends with a spanning portion extending therebetween, the first end having an elongate opening extending therethrough; and a locking member configured to engage opposed inner walls of the opposed arms of the spinal fixation element receiving portion, the locking member being configured to maintain a location of a spinal fixation element with respect to the spinal fixation element receiving portion in which the spinal fixation element is disposed, and further configured to maintain a location of the connecting member with respect to the bone anchor. 11. The system of claim 1 , further comprising a second bone anchor having a bone-engaging portion and a spinal fixation element receiving portion configured to receive a spinal fixation element therein, the second bone anchor being configured to be mated to the second end of the connecting member.