Importance

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Abstract

An articulated modular spinal fusion cage is implanted in the intervertebral space and adjusted in situ from an anterior access position to support adjacent vertebrae in normal curved alignment. The cage includes a first leg having a cylindrical pivot member and a second leg having a socket. The socket permits pivotal movement of the first leg with respect to the second leg to an anteriorly open, wedge-shaped orientation which may be selectively angularly adjusted. The laterally elongated socket and pivot member form a fulcrum that is positioned anteriorly from the posterior leg ends to enhance torsional stability and increase anterior preload. A driver is inserted through a bore in the socket and corresponding groove in the flange and is operable to engage a sloped interior surface of the first leg and to urge the anterior end upwardly by rotating the pivot member within the socket.

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First Claim