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- W4386013041 abstract "Vertebral body replacement is a common surgical procedure for treatment of disorders associated with spinal instability. Therefore, pedicle screws are usually inserted in adjacent vertebrae for stabilization of the posterior column, however, there is lack of evidence whether implantation of index-level pedicle screws is beneficial or not. This biomechanical study aims to investigate the effect of pedicle screw instrumentation on axial stability following vertebral body replacement.Unstable fracture at L3 level was simulated in lumbar spines from six human cadaveric specimens. Then instrumentation was performed one level above / one level below index level in three specimens and further, three specimens were instrumented at index-level (L3) additionaly. Then we used a testing protocol for biomechanical evaluation of axial loading on human cadaveric lumbar spines until cage subsidence occurred.Our results show that index-level instrumented spines endured significantly higher load until cage subsidence occurred compared to non-index-level instrumented specimens (p = 0.05).Our results demonstrate pedicle screw instrumentation at index-level vertebra should be considered when possbile as it may have a protective effect against cage subsidence in patients undergoing vertebral body replacement surgery." @default.
- W4386013041 created "2023-08-21" @default.
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- W4386013041 date "2023-10-01" @default.
- W4386013041 modified "2023-10-18" @default.
- W4386013041 title "Does index-level pedicle screw instrumentation affect cage subsidence after vertebral body replacement? – A biomechanical study in human cadaveric osteoporotic specimens" @default.
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- W4386013041 doi "https://doi.org/10.1016/j.clinbiomech.2023.106075" @default.
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