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Goossens Q, Vancleef S, Leuridan S, Pastrav LC, Mulier M, Desmet W, Vander Sloten J, Denis K. The Use of a Vibro-Acoustic Based Method to Determine the Composite Material Properties of a Replicate Clavicle Bone Model. J Funct Biomater 2020; 11:jfb11040069. [PMID: 32987709 PMCID: PMC7712050 DOI: 10.3390/jfb11040069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/11/2020] [Accepted: 09/21/2020] [Indexed: 11/16/2022] Open
Abstract
Replicate bones are widely used as an alternative for cadaveric bones for in vitro testing. These composite bone models are more easily available and show low inter-specimen variability compared to cadaveric bone models. The combination of in vitro testing with in silico models can provide further insights in the evaluation of the mechanical behavior of orthopedic implants. An accurate numerical representation of the experimental model is important to draw meaningful conclusions from the numerical predictions. This study aims to determine the elastic material constants of a commonly used composite clavicle model by combining acoustic experimental and numerical modal analysis. The difference between the experimental and finite element (FE) predicted natural frequencies was minimized by updating the elastic material constants of the transversely isotropic cortical bone analogue that are provided by the manufacturer. The longitudinal Young's modulus was reduced from 16.00 GPa to 12.88 GPa and the shear modulus was increased from 3.30 GPa to 4.53 GPa. These updated material properties resulted in an average natural frequency difference of 0.49% and a maximum difference of 1.73% between the FE predictions and the experimental results. The presented updated model aims to improve future research that focuses on mechanical simulations with clavicle composite bone models.
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Affiliation(s)
- Quentin Goossens
- Department of Mechanical Engineering, Biomechanics Section, KU Leuven, 3000 Leuven, Belgium; (S.V.); (S.L.); (L.C.P.); (J.V.S.); (K.D.)
- Correspondence:
| | - Sanne Vancleef
- Department of Mechanical Engineering, Biomechanics Section, KU Leuven, 3000 Leuven, Belgium; (S.V.); (S.L.); (L.C.P.); (J.V.S.); (K.D.)
| | - Steven Leuridan
- Department of Mechanical Engineering, Biomechanics Section, KU Leuven, 3000 Leuven, Belgium; (S.V.); (S.L.); (L.C.P.); (J.V.S.); (K.D.)
| | - Leonard Cezar Pastrav
- Department of Mechanical Engineering, Biomechanics Section, KU Leuven, 3000 Leuven, Belgium; (S.V.); (S.L.); (L.C.P.); (J.V.S.); (K.D.)
| | - Michiel Mulier
- Division of Orthopaedics, University Hospital Leuven, 3000 Leuven, Belgium;
| | - Wim Desmet
- Department of Mechanical Engineering, MSD Section, KU Leuven, 3000 Leuven, Belgium;
| | - Jos Vander Sloten
- Department of Mechanical Engineering, Biomechanics Section, KU Leuven, 3000 Leuven, Belgium; (S.V.); (S.L.); (L.C.P.); (J.V.S.); (K.D.)
| | - Kathleen Denis
- Department of Mechanical Engineering, Biomechanics Section, KU Leuven, 3000 Leuven, Belgium; (S.V.); (S.L.); (L.C.P.); (J.V.S.); (K.D.)
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Blondel M, Abidine Y, Assemat P, Palierne S, Swider P. Identification of effective elastic modulus using modal analysis; application to canine cancellous bone. J Biomech 2020; 110:109972. [PMID: 32827789 DOI: 10.1016/j.jbiomech.2020.109972] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 07/03/2020] [Accepted: 07/20/2020] [Indexed: 10/23/2022]
Abstract
Mechanical properties of cancellous bone is of increasing interest due to its involvement in aging pathologies and oncology. Characterization of fragile bone tissue is challenging and available methodologies include quasi-static compressive tests of small size specimens, ultrasound and indentation techniques. We hypothesized that modal analysis of flexure beams could be a complementary methodology to obtain Young modulus. The sampling methodology was adapted such that the uniqueness of the linear dynamic response was available to determine the elastic modulus from natural frequencies and mode shapes. In a first step, the methodology was validated using a synthetic bone model as control. Then, water-jet cutting allowed collecting fourteen small beam-like specimens in canine distal femurs. X-ray microtomography confirmed the microarchitecture preservation, the homogeneity and the isotropy at the specimen scale to derive effective properties. The first natural frequency in clamped-free boundary conditions was used to obtain mean values of Young modulus, which ranged from 210 MPa to 280 MPa depending on the specimen collection site. Experimental tests were rapid and reproducible and our preliminary results were in good agreement with literature data. In conclusion, beam modal analysis could be considered for exploring mechanical properties of fragile and scarce biological tissues.
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Affiliation(s)
- M Blondel
- National Veterinary School, Toulouse, France
| | - Y Abidine
- IMFT UMR 5502, Toulouse University, Toulouse, France
| | - P Assemat
- IMFT UMR 5502, Toulouse University, Toulouse, France
| | - S Palierne
- National Veterinary School, Toulouse, France
| | - P Swider
- IMFT UMR 5502, Toulouse University, Toulouse, France.
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Leuridan S, Goossens Q, Pastrav L, Roosen J, Mulier M, Denis K, Desmet W, Sloten JV. Determination of replicate composite bone material properties using modal analysis. J Mech Behav Biomed Mater 2016; 66:12-18. [PMID: 27829191 DOI: 10.1016/j.jmbbm.2016.10.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 10/24/2016] [Accepted: 10/26/2016] [Indexed: 11/28/2022]
Abstract
Replicate composite bones are used extensively for in vitro testing of new orthopedic devices. Contrary to tests with cadaveric bone material, which inherently exhibits large variability, they offer a standardized alternative with limited variability. Accurate knowledge of the composite's material properties is important when interpreting in vitro test results and when using them in FE models of biomechanical constructs. The cortical bone analogue material properties of three different fourth-generation composite bone models were determined by updating FE bone models using experimental and numerical modal analyses results. The influence of the cortical bone analogue material model (isotropic or transversely isotropic) and the inter- and intra-specimen variability were assessed. Isotropic cortical bone analogue material models failed to represent the experimental behavior in a satisfactory way even after updating the elastic material constants. When transversely isotropic material models were used, the updating procedure resulted in a reduction of the longitudinal Young's modulus from 16.00GPa before updating to an average of 13.96 GPa after updating. The shear modulus was increased from 3.30GPa to an average value of 3.92GPa. The transverse Young's modulus was lowered from an initial value of 10.00GPa to 9.89GPa. Low inter- and intra-specimen variability was found.
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Affiliation(s)
- Steven Leuridan
- KU Leuven, Department of Mechanical Engineering, Biomechanics Section, Celestijnlaan 300C - box 2419, 3000 Leuven, Belgium.
| | - Quentin Goossens
- KU Leuven, Department of Mechanical Engineering, Biomechanics Section, Celestijnlaan 300C - box 2419, 3000 Leuven, Belgium; KU Leuven, Department of Mechanical Engineering Technology, Andreas Vesaliusstraat 13 - box 2600, 3000 Leuven, Belgium.
| | - Leonard Pastrav
- KU Leuven, Department of Mechanical Engineering Technology, Andreas Vesaliusstraat 13 - box 2600, 3000 Leuven, Belgium.
| | - Jorg Roosen
- University Hospitals Leuven, Department of Orthopedics, Weligerveld 1, 3212 Leuven, Belgium.
| | - Michiel Mulier
- University Hospitals Leuven, Department of Orthopedics, Weligerveld 1, 3212 Leuven, Belgium.
| | - Kathleen Denis
- KU Leuven, Department of Mechanical Engineering Technology, Andreas Vesaliusstraat 13 - box 2600, 3000 Leuven, Belgium.
| | - Wim Desmet
- KU Leuven, Department of Mechanical Engineering, Production Engineering, Machine Design and Automation Section, Celestijnlaan 300C - box 2420, 3000 Leuven, Belgium.
| | - Jos Vander Sloten
- KU Leuven, Department of Mechanical Engineering, Biomechanics Section, Celestijnlaan 300C - box 2419, 3000 Leuven, Belgium.
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de Bonnecaze G, Chaput B, Woisard V, Uro-Coste E, Swider P, Vergez S, Serrano E, Casteilla L, Planat-Benard V. Adipose stromal cells improve healing of vocal fold scar: Morphological and functional evidences. Laryngoscope 2016; 126:E278-85. [PMID: 27075408 DOI: 10.1002/lary.25867] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Revised: 11/23/2015] [Accepted: 12/15/2015] [Indexed: 12/27/2022]
Abstract
OBJECTIVES/HYPOTHESIS Adipose derived stromal cells (ASCs) are abundant and easy to prepare. Such cells may be useful for treating severe vocal disturbance caused by acute vocal fold scars. STUDY DESIGN Prospective animal experiments with controls. METHODS Twenty New-Zealand white rabbits were used in the present study. We evaluated vocal fold healing, with or without injection of autologous ASCs, after acute scarring. A defined lesion was created and the ASCs were immediately injected. Vocal fold regeneration was evaluated histomorphometrically and via viscoelastic analysis using an electrodynamic shaker. RESULTS Six weeks after ASC injection, vocal folds exhibited significantly less inflammation than control folds (P < 0.005). In addition, hypertrophy of the lamina propria and fibrosis were significantly reduced upon ASC injection (P < 0.02). The decrease in viscoelastic parameters was less important in the ASC injected group compared to the noninjected group (P = 0.08). CONCLUSION Injection of autologous ASCs improved vocal fold healing in our preclinical model. Further studies are needed, but this method may be useful in humans. LEVEL OF EVIDENCE NA. Laryngoscope, 126:E278-E285, 2016.
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Affiliation(s)
- Guillaume de Bonnecaze
- CNRS UMR5273 STROMALab, University of Toulouse, Toulouse Cedex, France.,Université Paul Sabatier de Toulouse, University of Toulouse, Toulouse Cedex, France.,Department of Ear, Nose and Throat Head and Neck Surgery, University of Toulouse, Toulouse Cedex, France
| | - Benoit Chaput
- CNRS UMR5273 STROMALab, University of Toulouse, Toulouse Cedex, France.,Université Paul Sabatier de Toulouse, University of Toulouse, Toulouse Cedex, France.,INSERM U1031, University of Toulouse, Toulouse Cedex, France.,EFS Pyrénées-Méditerranée, University of Toulouse, Toulouse Cedex, France.,Department of Plastic Reconstructive and Aesthetic Surgery, University of Toulouse, Toulouse Cedex, France
| | - Virginie Woisard
- Department of Ear, Nose and Throat Head and Neck Surgery, University of Toulouse, Toulouse Cedex, France
| | | | - Pascal Swider
- Biomechanics Group, IMFT UMR CNRS 5502, Toulouse Cedex, France
| | - Sebastien Vergez
- Department of Ear, Nose and Throat Head and Neck Surgery, University of Toulouse, Toulouse Cedex, France
| | - Elie Serrano
- Department of Ear, Nose and Throat Head and Neck Surgery, University of Toulouse, Toulouse Cedex, France
| | - Louis Casteilla
- CNRS UMR5273 STROMALab, University of Toulouse, Toulouse Cedex, France.,Université Paul Sabatier de Toulouse, University of Toulouse, Toulouse Cedex, France.,INSERM U1031, University of Toulouse, Toulouse Cedex, France.,EFS Pyrénées-Méditerranée, University of Toulouse, Toulouse Cedex, France
| | - Valerie Planat-Benard
- CNRS UMR5273 STROMALab, University of Toulouse, Toulouse Cedex, France.,Université Paul Sabatier de Toulouse, University of Toulouse, Toulouse Cedex, France.,INSERM U1031, University of Toulouse, Toulouse Cedex, France.,EFS Pyrénées-Méditerranée, University of Toulouse, Toulouse Cedex, France
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