Stresses on the cervical column associated with vertical occlusal alteration.
The biomechanical effects on cervical vertebral columns (C1-C7) during mastication were calculated using a three-dimensional (3D) finite element method. To verify the biomechanical influences of vertical occlusal alteration to the cervical column, three finite element models (FEM) showing a normal (model A), a steep (model B), and a flat occlusal plane (model C) were constructed. The occlusal stress distribution showed various patterns for the three models; the stress extended to the anterior area as the occlusal plane became steeper. The plots of the stresses on the mid sagittal section of the cervical columns showed different patterns for the three models; the stress converged at the odontoid process in models A and B, whereas the stresses at C7 in model B tended to decrease compared with model A. Concentrated stress was observed at C5 in model C, supporting the hypothesis that vertical occlusal alteration could influence stress distribution in the cervical columns.
Department of Orthodontics, Nihon University School of Dentistry, Tokyo, Japan.
Mitsuru
M
Motoyoshi
Takahisa
T
Shimazaki
Kohei
K
Hosoi
Mizuki
M
Wada
Shinkichi
S
Namura
D000328:Adult; D001696:Biomechanical Phenomena; D001732:Bite Force; D002574:Cervical Vertebrae / Q000502:physiology*; D003198:Computer Simulation; D017076:Computer-Aided Design; D003766:Dental Occlusion; D020342:Finite Element Analysis; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000503:physiopathology; D008409:Mastication / Q000502:physiology*; D008410:Masticatory Muscles / Q000502:physiology; D008954:Models, Biological; D009119:Muscle Contraction / Q000502:physiology; D009809:Odontoid Process / Q000502:physiology; D013314:Stress, Mechanical; D014716:Vertical Dimension