Effects of Custom-Made and Thread Dental Implant Systems on the Stress Distribution in Alveolar Bone: A 3-Dimensional Finite Element Analysis

Abstract

Aiming to investigate the effects of custom-made and thread dental implant systems on the stress distribution in alveolar bone using linear analysis of the finite element method (FEM). Two types of systems: the custom-made implant and the thread dental implant system, were studied using a three-dimensional finite element analysis (3D FEA). Comparing the parts of all systems for loading in different directions, the stress and deformation distribution in custom-made implant and alveolar bone are better than that in thread dental implant system. The analysis data definitely demonstrated the difference in stress and deformation distribution of components in different dental implant systems. Results show the custom-made implants are provided with more advantages and can be used in future experiment and clinical test.

Effects of Dental Implant-abutment Interfaces on the Reliability of Implant Systems

“…the connecting and contact means between the implant and the abutment, is therefore the key factor of the reliability of the implant system. Today most of the relatively good products on the market adopt the implantabutment connection interface that uses a taper surface and a hexagon connection matching [5,6]. However, there is no clear conclusion regarding how to optimize the interface design and what kind of factors having the greater effect on the reliability of implant systems.…”

“…The modeling of the shape of the alveolar bone tissue is based on the CT scanning data of human lower jaws, including two parts: the cortical bone and the cancellous bone. The crown is wrapped with the cortical bone, which is 2mm thick [6]. By the SolidWorks software, we now establish the component models and analytical models above, as shown in Figure 1 Through the CAD interface of the ANSYS software, we import the file into the FEA software ANSYS Workbench for static and fatigue analysis.…”

“…In this research we assume that all the tissue and materials in the models are continuous, homogeneous and isotropic linear elastic materials. The materials for the implant systems are titanium alloy Ti6Al4V for its best biocompatibility, and the crowns adopt zirconia [6,9]. Specific material properties are shown in Table 1.…”

“…The size of this design is the most commonly used on the market [6,7]. The crown bears the main load.…”

“…The lower of the alveolar bone is a fixed constraint, the contact between the implant and the abutment, and the contact between the alveolar bone and the implant are both assumed to be fixed [5,6]. The force direction is an angle of 30 degrees from the axial direction of the implant, and in the test we use a force of 200N, with a pre-tightening torque of 30N.CM on the central screw [5][6][7].…”