Stress Analysis of Dental Implant and Its Mode Shapes

Objectives:

The goal of current study was to determine the frequencies and mode shapes of dental implant using component mode synthesis method. Also, this study deals with formulation of force distritions on the occlusal material using numerical approach and mechanics. The CNC experimental work has been carried out to get the time-loads data.

Methods:

Component mode synthesis method has been employed to find the frequencies and mode shapes of dental implant. A two-dimensional plane elasticity model is employed to solve force-equilibrium equation. And, hexahedral-contact elements were used between implant threads and bone, the mating surfaces of the implant and abutment.

Results:

It is shown that there exist high shear stresses near the front edge of the occlusal material. And, large amount of compressive stresses are concentrated at the connection between the head and the first three threads of the implant.

In evaluation of the frequencies and mode shapes of the dental implant including abutment, metal frame work, and occlusal material, component mode synthesis method has been used in this study. The first mode of the model was a bending mode, second mode was a twisting mode, and corresponding frequencies were 27kHz, and 34 kHz, respectively. Dynamic characteristics varies depending on the geometric parameters(height, diameter, etc.)of the implant and the bone .

Conclusions:

The force transfer at the abutment-implant and implant-bone interface is an essential step in the overall analysis of loading, which determines the success or failure of an implant. In this study, two and three dimensional finite element analysis has been used for the quantitative evaluation of dynamic characteristics and stress distributions on the implant and its surroundings.