Semi-Polyaxiality Screws

25D screws restrict motion to half polyaxial range, combining benefits of polyaxial screws (ease of rod insertion) and monoaxial screws.

Coronal & Axial Correction

The 25D screws are designed to provide polyaxial freedom in the cranial/caudal plane, but restrict motion in the medial/lateral plane to enable more control of the vertebra during reduction maneuvres.

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Apical Vertebra Derotation

Restricted motion of the 25D screws can be directed medially or laterally, enabling direct rotation of vertebra and allowing a safe and efficient direct vertebra rotation.

Identification of the Fixed Area

The restricted motion side is indicated by a laser etch on the screw head.