Preliminary clinical results demonstrate effective lumbar lordosis restoration in adults using a novel four-rod technique, suggesting improved alignment control.
Introduction: In adult spinal deformity (ASD) surgery extending to the pelvis, commonly restores lumbar lordosis (LL) using cantilever techniques with over-contoured rods. However, these techniques require precise rod contouring and allow only limited intraoperative adjustment of LL after fixation, potentially resulting in inadequate correction and mechanical complications. To overcome these limitations, we developed the Tension Chord Four-Rod (TC4) technique, which enables controlled adjustment of lumbar alignment even after rod placement.
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Otsuki et al. (2026) studied this question.
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