Eva Klintström1, Benjamin Klintström2, Dieter Pahr3, Torkel B Brismar4, Örjan Smedby5, Rodrigo Moreno6. 1. Department of Medical and Health Sciences and Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden. Electronic address: Eva.klintstrom@regionostergotland.se. 2. School of Technology and Health, KTH Royal Institute of Technology, Hälsovägen, Stockholm, Sweden. 3. Institute of Lightweight Design and Structural Biomechanics, Technical University Vienna, Vienna, Austria. 4. Department of Clinical Science, Intervention and Technology at Karolinska Institute and Department of Radiology, Karolinska University Hospital, Stockholm, Sweden. 5. Department of Biomedical Engineering and Health Systems, KTH Royal Institute of Technology, Stockholm, Sweden; Department of Medical and Health Sciences, Linköping University, Linköping, Sweden. 6. Department of Biomedical Engineering and Health Systems, KTH Royal Institute of Technology, Stockholm, Sweden.
Abstract
OBJECTIVES: The aim of this study was to evaluate the possibility of estimating the biomechanical properties of trabecular bone through finite element simulations by using dental cone beam computed tomography data. STUDY DESIGN: Fourteen human radius specimens were scanned in 3 cone beam computed tomography devices: 3-D Accuitomo 80 (J. Morita MFG., Kyoto, Japan), NewTom 5 G (QR Verona, Verona, Italy), and Verity (Planmed, Helsinki, Finland). The imaging data were segmented by using 2 different methods. Stiffness (Young modulus), shear moduli, and the size and shape of the stiffness tensor were studied. Corresponding evaluations by using micro-CT were regarded as the reference standard. RESULTS: The 3-D Accuitomo 80 (J. Morita MFG., Kyoto, Japan) showed good performance in estimating stiffness and shear moduli but was sensitive to the choice of segmentation method. NewTom 5 G (QR Verona, Verona, Italy) and Verity (Planmed, Helsinki, Finland) yielded good correlations, but they were not as strong as Accuitomo 80 (J. Morita MFG., Kyoto, Japan). The cone beam computed tomography devices overestimated both stiffness and shear compared with the micro-CT estimations. CONCLUSIONS: Finite element-based calculations of biomechanics from cone beam computed tomography data are feasible, with strong correlations for the Accuitomo 80 scanner (J. Morita MFG., Kyoto, Japan) combined with an appropriate segmentation method. Such measurements might be useful for predicting implant survival by in vivo estimations of bone properties.
OBJECTIVES: The aim of this study was to evaluate the possibility of estimating the biomechanical properties of trabecular bone through finite element simulations by using dental cone beam computed tomography data. STUDY DESIGN: Fourteen human radius specimens were scanned in 3 cone beam computed tomography devices: 3-D Accuitomo 80 (J. Morita MFG., Kyoto, Japan), NewTom 5 G (QR Verona, Verona, Italy), and Verity (Planmed, Helsinki, Finland). The imaging data were segmented by using 2 different methods. Stiffness (Young modulus), shear moduli, and the size and shape of the stiffness tensor were studied. Corresponding evaluations by using micro-CT were regarded as the reference standard. RESULTS: The 3-D Accuitomo 80 (J. Morita MFG., Kyoto, Japan) showed good performance in estimating stiffness and shear moduli but was sensitive to the choice of segmentation method. NewTom 5 G (QR Verona, Verona, Italy) and Verity (Planmed, Helsinki, Finland) yielded good correlations, but they were not as strong as Accuitomo 80 (J. Morita MFG., Kyoto, Japan). The cone beam computed tomography devices overestimated both stiffness and shear compared with the micro-CT estimations. CONCLUSIONS: Finite element-based calculations of biomechanics from cone beam computed tomography data are feasible, with strong correlations for the Accuitomo 80 scanner (J. Morita MFG., Kyoto, Japan) combined with an appropriate segmentation method. Such measurements might be useful for predicting implant survival by in vivo estimations of bone properties.
Authors: Karen Mys; Peter Varga; Filip Stockmans; Boyko Gueorguiev; Verena Neumann; Olivier Vanovermeire; Caroline E Wyers; Joop P W van den Bergh; G Harry van Lenthe Journal: Calcif Tissue Int Date: 2021-01-16 Impact factor: 4.333
Authors: Laura Ferreira Pinheiro Nicolielo; Jeroen Van Dessel; G Harry van Lenthe; Ivo Lambrichts; Reinhilde Jacobs Journal: Br J Radiol Date: 2018-09-17 Impact factor: 3.039