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A combined geometric morphometric and discrete element modeling approach for hip cartilage contact mechanics

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Abstract
Finite element analysis (FEA) provides the current reference standard for numerical simulation of hip cartilage contact mechanics. Unfortunately, the development of subject-specific FEA models is a laborious process. Owed to its simplicity, Discrete Element Analysis (DEA) provides an attractive alternative to FEA. Advancements in computational morphometrics, specifically statistical shape modeling (SSM), provide the opportunity to predict cartilage anatomy without image segmentation, which could be integrated with DEA to provide an efficient platform to predict cartilage contact stresses in large populations. The objective of this study was, first, to validate linear and non-linear DEA against a previously validated FEA model and, second, to present and evaluate the applicability of a novel population-averaged cartilage geometry prediction method against previously used methods to estimate cartilage anatomy. The population-averaged method is based on average cartilage thickness maps and therefore allows for a more accurate and individualized cartilage geometry estimation when combined with SSM. The root mean squared error of the population-averaged cartilage geometry predicted by SSM as compared to the manually segmented cartilage geometry was 0.31 +/- 0.08 mm. Identical boundary and loading conditions were applied to the DEA and FEA models. Predicted DEA stress distribution patterns and magnitude of peak stresses were in better agreement with FEA for the novel cartilage anatomy prediction method as compared to commonly used parametric methods based on the estimation of acetabular and femoral head radius. Still, contact stress was overestimated and contact area was underestimated for all cartilage anatomy prediction methods. Linear and non-linear DEA methods differed mainly in peak stress results with the non-linear definition being more sensitive to detection of high peak stresses. In conclusion, DEA in combination with the novel population-averaged cartilage anatomy prediction method provided accurate predictions while offering an efficient platform to conduct population-wide analyses of hip contact mechanics.
Keywords
Biotechnology, Bioengineering, Histology, Biomedical Engineering, hip joint, contact mechanics, discrete element analysis, finite element analysis, cartilage prediction, NATIONWIDE PROSPECTIVE COHORT, PRESSURE DISTRIBUTION, ACETABULAR DYSPLASIA, JOINT, OSTEOARTHRITIS, STRESSES, VALIDATION, PREDICTION, DEFORMITY, THICKNESS

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MLA
Van Houcke, Jan, et al. “A Combined Geometric Morphometric and Discrete Element Modeling Approach for Hip Cartilage Contact Mechanics.” FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY, vol. 8, 2020, doi:10.3389/fbioe.2020.00318.
APA
Van Houcke, J., Audenaert, E., Atkins, P. R., & Anderson, A. E. (2020). A combined geometric morphometric and discrete element modeling approach for hip cartilage contact mechanics. FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY, 8. https://doi.org/10.3389/fbioe.2020.00318
Chicago author-date
Van Houcke, Jan, Emmanuel Audenaert, Penny R. Atkins, and Andrew E. Anderson. 2020. “A Combined Geometric Morphometric and Discrete Element Modeling Approach for Hip Cartilage Contact Mechanics.” FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY 8. https://doi.org/10.3389/fbioe.2020.00318.
Chicago author-date (all authors)
Van Houcke, Jan, Emmanuel Audenaert, Penny R. Atkins, and Andrew E. Anderson. 2020. “A Combined Geometric Morphometric and Discrete Element Modeling Approach for Hip Cartilage Contact Mechanics.” FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY 8. doi:10.3389/fbioe.2020.00318.
Vancouver
1.
Van Houcke J, Audenaert E, Atkins PR, Anderson AE. A combined geometric morphometric and discrete element modeling approach for hip cartilage contact mechanics. FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY. 2020;8.
IEEE
[1]
J. Van Houcke, E. Audenaert, P. R. Atkins, and A. E. Anderson, “A combined geometric morphometric and discrete element modeling approach for hip cartilage contact mechanics,” FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY, vol. 8, 2020.
@article{8660645,
  abstract     = {Finite element analysis (FEA) provides the current reference standard for numerical simulation of hip cartilage contact mechanics. Unfortunately, the development of subject-specific FEA models is a laborious process. Owed to its simplicity, Discrete Element Analysis (DEA) provides an attractive alternative to FEA. Advancements in computational morphometrics, specifically statistical shape modeling (SSM), provide the opportunity to predict cartilage anatomy without image segmentation, which could be integrated with DEA to provide an efficient platform to predict cartilage contact stresses in large populations. The objective of this study was, first, to validate linear and non-linear DEA against a previously validated FEA model and, second, to present and evaluate the applicability of a novel population-averaged cartilage geometry prediction method against previously used methods to estimate cartilage anatomy. The population-averaged method is based on average cartilage thickness maps and therefore allows for a more accurate and individualized cartilage geometry estimation when combined with SSM. The root mean squared error of the population-averaged cartilage geometry predicted by SSM as compared to the manually segmented cartilage geometry was 0.31 +/- 0.08 mm. Identical boundary and loading conditions were applied to the DEA and FEA models. Predicted DEA stress distribution patterns and magnitude of peak stresses were in better agreement with FEA for the novel cartilage anatomy prediction method as compared to commonly used parametric methods based on the estimation of acetabular and femoral head radius. Still, contact stress was overestimated and contact area was underestimated for all cartilage anatomy prediction methods. Linear and non-linear DEA methods differed mainly in peak stress results with the non-linear definition being more sensitive to detection of high peak stresses. In conclusion, DEA in combination with the novel population-averaged cartilage anatomy prediction method provided accurate predictions while offering an efficient platform to conduct population-wide analyses of hip contact mechanics.},
  articleno    = {318},
  author       = {Van Houcke, Jan and Audenaert, Emmanuel and Atkins, Penny R. and Anderson, Andrew E.},
  issn         = {2296-4185},
  journal      = {FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY},
  keywords     = {Biotechnology,Bioengineering,Histology,Biomedical Engineering,hip joint,contact mechanics,discrete element analysis,finite element analysis,cartilage prediction,NATIONWIDE PROSPECTIVE COHORT,PRESSURE DISTRIBUTION,ACETABULAR DYSPLASIA,JOINT,OSTEOARTHRITIS,STRESSES,VALIDATION,PREDICTION,DEFORMITY,THICKNESS},
  language     = {eng},
  pages        = {13},
  title        = {A combined geometric morphometric and discrete element modeling approach for hip cartilage contact mechanics},
  url          = {http://dx.doi.org/10.3389/fbioe.2020.00318},
  volume       = {8},
  year         = {2020},
}

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