title: Effects of several temporomandibular disorders on the stress distributions of temporomandibular joint: a finite element analysis.
abstract: The aim of this study was to evaluate stress distributions in the temporomandibular joints (TMJs) with temporomandibular disorders (TMDs) for comparison with healthy TMJs. A model of mandible and normal TMJs was developed according to CT images. The interfaces between the discs and the articular cartilages were treated as contact elements. Nonlinear cable elements were used to simulate disc attachments. Based on this model, seven models of various TMDs were established. The maximum stresses of the discs with anterior, posterior, medial and lateral disc displacement (ADD, PDD, MDD and LDD) were 12.09, 9.33, 10.71 and 6.07 times magnitude of the identically normal disc, respectively. The maximum stresses of the posterior articular eminences in ADD, PDD, MDD, LDD, relaxation of posterior attachments and disc perforation models were 21, 59, 46, 21, 13 and 15 times greater than the normal model, respectively. TMDs could cause increased stresses in the discs and posterior articular eminences.
authors.affiliation: a Provincial Key Laboratory of Biomechanical Engineering , Sichuan University , Chengdu , Sichuan , P.R. China.
authors.forename: Zhan
authors.initials: Z
authors.lastname: Liu
authors.affiliation: b Strength Design Department, AVIC 611 Institute , Chengdu , Sichuan , P.R. China.
authors.forename: Yingli
authors.initials: Y
authors.lastname: Qian
authors.affiliation: a Provincial Key Laboratory of Biomechanical Engineering , Sichuan University , Chengdu , Sichuan , P.R. China.
authors.forename: Yuanli
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: c Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education , School of Biological Science and Medical Engineering, Beihang University , 37 Xueyuan Road, Haidian District , Beijing 100191 , P.R. China.
authors.forename: Yubo
authors.initials: Y
authors.lastname: Fan
mesh_terms: D019245:Compressive Strength; D020342:Finite Element Analysis; D006801:Humans; D008334:Mandible / Q000473:pathology; D008953:Models, Anatomic; D013314:Stress, Mechanical; D013704:Temporomandibular Joint / Q000473:pathology*; D019224:Temporomandibular Joint Disc / Q000473:pathology*; D013705:Temporomandibular Joint Disorders / Q000473:pathology*; D013718:Tensile Strength
keywords: articular disc; finite element analysis; stress distribution; temporomandibular disorder; temporomandibular joint