Stress Distribution in Maxillary Alveolar Ridge According to Finite Element Analysis Using Micro-CT

Abstract

The purpose of the present study was to evaluate stress distribution by finite element analysis in an accurate model simulating trabecular bone using micro-CT. Dentulous and edentulous maxillary jaws of Japanese adult cadavers were used (5 sides each; total, 10 sides). Imaging was performed using a micro-CT, followed by reconstruction with 3-D images. Finite element analysis models were developed using the maxilla with average bone morphometry. A load corresponding to occlusal force was applied in different loading conditions, followed by evaluation of stress distribution. In dentulous maxillas, a load was applied in the dental axis direction to the first molar crown (LD). In edentulous maxillas, a load was applied directly to a circular area 4mm in diameter (LER0) to a cylinder 4 mm in diameter and 10mm in height (LER10) corresponding to the first molar area. Stress was concentrated in cortical bone around the first molar, trabecular bone and cortical bone at the maxillary sinus base in LD, cortical bone of the alveolar ridge in LER0, and trabecular bone around the cylinder and cortical bone at the maxillary sinus base in LER10. LER0 showed a stress distribution markedly different from that in LD. Compared with LER0, LER10 showed a stress distribution close to that in LD. A model simulating trabecular bone allows a more accurate evaluation of stress distribution.

The impact of occlusal function on structural adaptation in alveolar bone of the growing pig, Sus Scrofa

“…Also a decreasing tendency in BV/TV from cervical to apical was found in all of the 23-week pig ABPs whereas the corresponding regions in the 13-week pigs showed no regional difference. A numerical model of loading at the human first maxillary molar suggested that occlusal stress would concentrate mainly on cervical cortical bone around the tooth root 21. The tendency for a denser and apically decreasing ABP density in 23-week pigs could indicate that the ABP responded to occlusal loading with increased bone apposition in the 23-week pigs, especially in the cervical ABP.…”

The Influence of Bite Force on the Internal Structure of the Mandible through Implant-Three-dimensional and Mechanical Analysis Using Micro-CT and Finite Element Method-

“…This finding suggests the possibility that the force via implant was related to trabecular bone maintenance. 27 Furthermore, because stress propagation was dependent on trabecular alignment, stress was likely to concentrate in the osseous tissue around the implants. Stress tends to concentrate in areas where a load is applied, irregular morphological features such as neck and acute angle are present, and elastic 11 coefficients differ.…”

Cortical Bone Stress Distribution in Mandibles with Different Configurations Restored with Prefabricated Bar-Prosthesis Protocol: A Three-Dimensional Finite-Element Analysis

“…ANSYS Workbench 10.0 software (Swanson Analysis Inc., Huston, PA) was used to obtain the stress fields (Fig 4). Although von Mises stress criteria have been obtained in some studies, 19–24 maximum and minimum principal stresses (σ max , σ min ), equivalent von Mises stress (σ vM ), and maximum principal strain (ɛ max ) were obtained for all conditions. Maximum principal stress was selected because the bone shows large differences between the ultimate tensile and compressive strengths 25,26 .…”