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Table 2 Babu-Mehta classification of facet joint violation

From: Pedicle screw placement accuracy in robot-assisted versus image-guided freehand surgery of thoraco-lumbar spine (ROBARTHRODESE): study protocol for a single-centre randomized controlled trial

Grade 0

Screw not in facet

Grade 1

Screw in lateral facet but not in facet articulation

Grade 2

Penetration of facet articulation

Grade 3

Screw travels within facet articulation

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Trials

ISSN: 1745-6215