Riesenbeck Oliver, Czarnowski Niklas, Raschke Michael Johannes, Oeckenpöhler Simon, Hartensuer René
Department of Trauma, Hand and Reconstructive Surgery, University Hospital Münster, Albert-Schweitzer-Campus 1, Building W1, Waldeyerstraße 1, 48149 Münster, Germany.
Center for Orthopaedic, Traumatology, Handsurgery and Sports Medicine, Klinikum Aschaffenburg-Alzenau, 63739 Aschaffenburg, Germany.
Bioengineering (Basel). 2024 Aug 5;11(8):795. doi: 10.3390/bioengineering11080795.
This biomechanical in vitro study compared two kyphoplasty devices for the extent of height reconstruction, load-bearing capacity, cement volume, and adjacent fracture under cyclic loading.
Multisegmental (T11-L3) specimens were mounted into a testing machine and subjected to compression, creating an incomplete burst fracture of L1. Kyphoplasty was performed using a one- or two-compartment device. Then, the testing machine was used for a cyclic loading test of load-bearing capacity to compare the two groups for the amount of applied load until failure and subsequent adjacent fracture.
Vertebral body height reconstruction was effective for both groups but not statistically significantly different. After cyclic loading, refracture of vertebrae that had undergone kyphoplasty was not observed in any specimen, but fractures were observed in adjacent vertebrae. The differences between the numbers of cycles and of loads were not statistically significant. An increase in cement volume was strongly correlated with increased risks of adjacent fractures.
The two-compartment device was not substantially superior to the one-compartment device. The use of higher cement volume correlated with the occurrence of adjacent fractures.
本体外生物力学研究比较了两种椎体后凸成形术器械在椎体高度重建程度、承重能力、骨水泥用量以及循环加载下邻近椎体骨折情况。
将多节段（T11-L3）标本安装到试验机上并施加压缩力，造成L1椎体不完全爆裂骨折。使用单腔或双腔器械进行椎体后凸成形术。然后，用试验机对承重能力进行循环加载测试，比较两组直至失效时的施加负荷量以及随后的邻近椎体骨折情况。
两组椎体高度重建均有效，但差异无统计学意义。循环加载后，未在任何标本中观察到接受椎体后凸成形术的椎体再骨折，但在邻近椎体中观察到骨折。循环次数和负荷量之间的差异无统计学意义。骨水泥用量增加与邻近椎体骨折风险增加密切相关。
双腔器械并不比单腔器械有显著优势。使用更多骨水泥与邻近椎体骨折的发生相关。
