Establishment Of Three-Dimensional Finite Element Model For Micro-Implant And Bone

Objective The three-dimensional mathematical models of micro-implants and bone were developed then analyzed the influence of different diameter and length of micro-implant or different angle of loading on the distribution of the stress on the implant–bone interface.Methods 1. I-DEAS FEM software was applied to establish the three-dimensional finite element model of bone and micro-implants with different diameter or length. 2. 200g force in different angle (45°,60°,90°) was applied to the head of micro—implant to investigate the stress distribution condition on the implant-bone interface. 3. Analyze the effect of different diameter, length or loading angle on stress distribution.Results 1. Established three-dimensional mathematical model of 9 kinds of micro-implants with different diameter and length and also three-dimensional element model of bone .2 Applied 200g force in 45°,60°or 90°angle on the neck of micro-implants, investigate the distribution condition of the stress on the implant-bone interface and analyzed the influence of different diameter , length and loading angle on the distribution of the stress on the implant- bone interface. 3. In the research, the maximal stress values are all in the 1mm area of the neck of implants.4.The stress values are different among the micro-implants with different diameter, the micro-implant with 1.8mm diameter had mini-stress distribution5. The change of the length among 6mm, 8mm, 10mm did not show much influence on the stress distribution. 6. Force in three angle were applied to the head of micro—implant, that is 45 degree,60 degree or 90degree,when loading angle is 45 degree the peak value is minimal and 90 degree had the maximal stress value.Conclusion 1.The stress focus on the neck of micro-implant in all of the conditions. 2. Among 1.4mm, 1.6mm, 1.8mm, the stress increased with the diameter of micro-implant, increase the diameter properly will be advantageous to stress distribution. 3 .Changes of length among 6mm, 8mm, 10mm did not influence the distribution of stress much. 4. Force in different angle,45 degree,60 degree,90 degree, the stress descend when angle drop ,adopt smaller angle may be advantageous .