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Fig. 2 | Journal of Orthopaedic Surgery and Research

Fig. 2

From: Application of dual-trajectory screws in revision surgery for lumbar adjacent segment disease: a finite element study

Fig. 2

Four instrumentation constructs with different configurations for ASDz revision surgery. A Original internal fixation removed and traditional trajectory (TT) screws extended. B Original TT screws retained and dual-trajectory screws extended. C Original internal fixation removed and CBT screws extended. D Original CBT screws retained and dual-trajectory screws extended. E Configuration of the designed cage. F Bone graft and cage had successful interbody fusion

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