Polyaxial bone anchors with increased angulation

A bone fixation system, comprising:

• a spinal rod;
• and
• a first polyaxial bone anchor configured to be anchored to a first vertebra and a second polyaxial bone anchor configured to be anchored to a second vertebra, wherein each of the first and second polyaxial bone anchors is configured to be coupled to the spinal rod so as to maintain a relative position between the first and second vertebra, wherein each of the first and second polyaxial bone anchors comprises:
• an anchor head defining a central axis and a longitudinal bore extending along the central axis, the longitudinal bore having a top opening and a bottom opening, the anchor head further defining a generally U-shaped channel transverse to the longitudinal bore and configured to receive the spinal rod;
• a bushing configured to be retained within the anchor head, the bushing defining a first centerpoint and a second centerpoint offset from the first centerpoint;
• and
• an anchor member having a first portion that is configured to be retained by the bushing, and a second portion that is configured to extend through the bottom opening of the anchor head and into the respective first or second vertebra,
• wherein the anchor member is configured to angulate with respect to the bushing about the first centerpoint so as to define a first range of angulation with respect to the central axis, and the bushing and the anchor member are configured to angulate together about the second centerpoint until the second portion of the anchor member abuts the anchor head so as to define a second range of angulation with respect to the central axis, wherein a sum of the first and second ranges of angulation is up to 50 degrees.