title: Bilinear elastic property of the periodontal ligament for simulation using a finite element mandible model.
abstract: This study aimed to introduce a procedure for determining the bilinear elastic moduli (E1 and E2) of the periodontal ligament for a mathematical tooth model to analyse stress in the mandible. The bone and tooth morphology were scanned from a dry skull and an extracted intact tooth, respectively, and reconstructed in a three-dimensional finite element model. The model showed good agreement with previously reported in vivo premolar movement when an E1 for the first phase tooth movement of 0.05 MPa and an E2 for the second phase of 8.0 MPa with ε(12) of 0.075 were adopted. The mandible model analysis indicated that a remarkably high maximum compressive stress in the cervical cortical bone and the tensile stress in areas of masticatory muscle attachment were found. Future stress analyses using a jaw model may follow the process of determination of bilinear moduli to enhance accurate simulation with less calculation time.
authors.affiliation: Institute of Solid Mechanics, Mechatronics and Biomechanics, Brno University of Technology, Antonínská 548/1, Brno, Czech Republic.
authors.forename: Libor
authors.initials: L
authors.lastname: Borák
authors.forename: Zdenek
authors.initials: Z
authors.lastname: Florian
authors.forename: Sonia
authors.initials: S
authors.lastname: Bartáková
authors.forename: Patrik
authors.initials: P
authors.lastname: Prachár
authors.forename: Natsuko
authors.initials: N
authors.lastname: Murakami
authors.forename: Masahiro
authors.initials: M
authors.lastname: Ona
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Igarashi
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Wakabayashi
mesh_terms: D000539:Alveolar Process / Q000033:anatomy & histology / Q000502:physiology; D001641:Bicuspid / Q000033:anatomy & histology / Q000502:physiology; D001696:Biomechanical Phenomena; D001732:Bite Force; D003198:Computer Simulation; D055119:Elastic Modulus; D020342:Finite Element Analysis; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000379:methods; D008334:Mandible / Q000033:anatomy & histology / Q000502:physiology; D008406:Masseter Muscle / Q000033:anatomy & histology / Q000502:physiology; D008954:Models, Biological; D009068:Movement; D009811:Odontometry; D010513:Periodontal Ligament / Q000502:physiology*; D011626:Pterygoid Muscles / Q000033:anatomy & histology / Q000502:physiology; D013314:Stress, Mechanical; D013703:Temporal Muscle / Q000033:anatomy & histology / Q000502:physiology; D019227:Tooth Apex / Q000033:anatomy & histology; D019228:Tooth Crown / Q000033:anatomy & histology; D014092:Tooth Root / Q000033:anatomy & histology; D020390:Tooth Socket / Q000033:anatomy & histology / Q000502:physiology