ArticleInternational journal of spine surgery2026
Integration of Stent Screw-Assisted Internal Fixation Into Posterior Fixations for High-Grade Thoracolumbar Spine Compression Fractures (SAIF-Rod).
Article in International journal of spine surgery, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundStent screw-assisted internal fixation (SAIF) has been shown to be a valid minimally invasive alternative in the treatment of high-grade osteoporotic and neoplastic fractures presenting with burst morphology, extreme collapse and kyphosis, extensive osteolysis, large pseudoarthrotic clefts, and pedicle or middle column involvement. However, the presence of local deformity and/or posterior tension band injury (as for osteoporotic fracture [OF] 4 and OF 5 fractures, according to the AO Spine-DGOU OF Classification) ideally requires a posterior fixation in addition to an armed kyphoplasty. For these cases, we have built upon our previous work that associates a posterior fixation with a SAIF by actually integrating the SAIF into the posterior fixation construct (SAIF-Rod).
objectiveTo describe the procedural steps and discuss the mechanical advantages of the novel technique called SAIF-Rod and present the results of our initial case series.
methodsAfter vertebral body stent expansion within the index vertebra, augmentable screws from the same set as the posterior fixation are introduced via K-wire exchange into the stent lumen. Kyphoplasty augmentation is performed through these screws. A posterior fixation performed above and below the index vertebra is connected to the screws at the index level. Rod-bending and compression maneuvers are used to address residual deformity that could not be corrected through the SAIF alone.
resultsA total of 21 patients (13 men) with a mean age of 76 years (interquartile range [IQR] 65-80) and with neoplastic (19%), traumatic (10%), and osteoporotic (71%) thoracolumbar fractures were treated with SAIF-Rod at our institution. Demographic and surgical data for a minimum follow-up of 12 months were presented. No major early or delayed complications (Clavien-Dindo grades 4 or 5) occurred. Mean intraoperative blood loss (150 mL, IQR 100-400), operating time (318 minutes, IQR 263-346), and length of stay at the hospital (7 days, IQR 5-11) were recorded.
conclusionIn selected cases, SAIF-Rod represents a minimally invasive surgical alternative for the treatment of high-grade osteoporotic, traumatic, and neoplastic fractures, usually accompanied by deformity. LEVEL OF EVIDENCE: 4:
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