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Cement Directed Kyphoplasty Reduces Cement Leakage as Compared to Vertebroplasty: Results of a Controlled, Randomized Trial.

Cement Directed Kyphoplasty Reduces Cement Leakage as Compared to Vertebroplasty: Results of a Controlled, Randomized Trial.

Spine (Phila Pa 1976). 2013 Jun 25;

Authors: Vogl T, Pflugmacher R, Hierholzer J, Stender G, Gounis M, Wakhloo A, Fiebig C, Hammerstingl R

Abstract
Study Design. A novel randomized, controlled, unblinded clinical trial comparing two procedural interventions for painful osteoporotic vertebral compression fractures.Objective. The primary study objective was to evaluate cement leakage for a cement directed kyphoplasty system (CDKS) with anteriorly biased cement flow and vertebroplasty. The secondary study objective was to compare adjacent level fracture rates and vertebral body height for these two intervention methods.Summary of Background Data. Cement leakage remains a significant clinical problem associated with vertebroplasty and kyphoplasty procedures. Uncontrolled cement flow in the posterior direction can result in leakage into the vertebral veins or spinal canal, leading to potentially serious clinical complications.Methods. Seventy-seven patients with painful osteoporotic vertebral compression fractures were enrolled. Patients were randomized 2:1 for treatment with CDKS (49 patients, 65 levels) or vertebroplasty (28 patients, 39 levels). Cement leakage was evaluated from radiographs and computed tomography (CT) scans. Three and 12-month follow-ups included additional radiographs and CT scans to assess changes in vertebral body height and the incidence of new fractures.Results. Treatment with CDKS significantly reduced the number of levels with leaks and the total number of leaks per level, as compared to vertebroplasty (p = 0.0132 and p = 0.0012, respectively). Significantly fewer lateral cortical and spinal canal leaks (posterior leaks) occurred in the CDKS group (p = 0.0050, p = 0.02260, respectively). Three adjacent level fractures occurred in the vertebroplasty group, as compared to two in the CDKS group. Vertebral body height maintenance was equivalent.Conclusion. Cement directed kyphoplasty effectively reduces posterior cement leakage, reducing the risk of leakage related complications.

PMID: 23804157 [PubMed – as supplied by publisher]

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