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Although several numerical studies have analysed the biomechanical response of the PDL, most did not consider its porous fibrous structure, and only a few analysed damage to the PDL. This study presents an innovative numerical formulation of a porous fibrous hyperelastic damage material model for the PDL. The model considers two separate softening phenomena: fibre alignment during loading and fibre rupture. The parameters for the material model characterization were fitted using experimental data from the literature. Furthermore, the experimental tests used for characterization were computationally modelled to verify the material parameters. A finite element model of a portion of a human mandible, obtained by microcomputerized tomography, was developed, and the proposed constitutive model was implemented for the PDL. Our results confirm that damage to the PDL may occur mainly because of overpressure of the interstitial fluid, while large forces must be applied to damage the PDL fibrous network. Moreover, this study clarifies some aspects of the relationship between PDL damage and the bone remodelling process.<\/jats:p>","DOI":"10.1002\/cnm.3176","type":"journal-article","created":{"date-parts":[[2019,1,10]],"date-time":"2019-01-10T01:19:27Z","timestamp":1547083167000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["A porous fibrous hyperelastic damage model for human periodontal ligament: Application of a microcomputerized tomography finite element model"],"prefix":"10.1002","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6186-5695","authenticated-orcid":false,"given":"Javier","family":"Ort\u00fan\u2010Terrazas","sequence":"first","affiliation":[{"name":"Group of Biomaterials, Aragon Institute of Engineering Research (I3A), Department of Mechanical Engineering University of Zaragoza  Zaragoza 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