Abstract
Summary
The correlations between the failure load of 20 T12 vertebral bodies, their patient-mode high-resolution peripheral quantitative computed tomography (HR-pQCT) indices, and the L1 areal bone mineral density (aBMD) were investigated. For the prediction of the T12 vertebral failure load, the T12 HR-pQCT microarchitectural parameters added significant information to that of L1 aBMD and to that of cortical BMD, but not to that of T12 vertebral BMD and not to that of T12 trabecular BMD.
Introduction
HR-pQCT is a new in vivo imaging technique for assessing the three-dimensional microarchitecture of cortical and trabecular bone at the distal radius and tibia. But little is known about this technique in the direct measurement of vertebral body.
Methods
Twenty female donors with the mean age of 80.1 (7.6) years were included in the study. Dual X-ray absorptiometry of the lumbar spine and femur was performed. The spinal specimens (T11/T12/L1) were dissected, scanned using HR-pQCT scanner, and mechanically tested under 4° wedge compression. The L1 aBMD, T12 patient-mode HR-pQCT indices, and T12 vertebral failure loads were analyzed.
Results
For the prediction of vertebral failure load, the inclusion of BV/TV into L1 aBMD was the best model (R 2 = 0.52), Tb.N and Tb.Sp added significant information to the L1 aBMD and to the cortical BMD, but none of the vertebral microarchitectural parameters yielded additional significant information to the trabecular BMD (or BV/TV) and to the vertebral BMD.
Conclusion
Vertebral microarchitectural parameters obtained from the patient-mode HR-pQCT analysis provide significant information on bone strength complementary to that of aBMD and to that of cortical BMD, but not to that of vertebral BMD and not to that of trabecular BMD.
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Acknowledgments
This study was financially supported by the German Federal Ministry of Education and Research (BMBF) through the consortium “BioAsset” (Grant number 01EC1005). The authors also would like to acknowledge Birgit Wulff for harvesting the donors and counseling the next of kin.
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Yongtao Lu and Matthias Krause contributed equally to this work and therefore share the first authorship.
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Lu, Y., Krause, M., Bishop, N. et al. The role of patient-mode high-resolution peripheral quantitative computed tomography indices in the prediction of failure strength of the elderly women’s thoracic vertebral body. Osteoporos Int 26, 237–244 (2015). https://doi.org/10.1007/s00198-014-2846-7
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DOI: https://doi.org/10.1007/s00198-014-2846-7