Effects of pelvic fixation strategies and multi-rod constructs on biomechanics of the proximal junction in long thoracolumbar posterior instrumented fusions: a finite-element analysis.

More recently, there has been an increasing trend in placing two iliac bolts on one or both sides of the pelvis to facilitate creating multi-rod (≥ 3) constructs across the lumbosacral junction and lumbar spine to decrease rates of pseudoarthroses and rod breakages at the lumbosacral junction and thoracolumbar junction in long posterior thoracolumbar instrumented fusions [ 12 – 14 ].

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