Journal of implantology and applied sciences ISSN:2765-7833(Print) 2765-7841(Online) 대한구강악안면임플란트학회지

Root analogue dental implants of the Frialit-2 Synchro models placed in the alveolar bone of thickness 11.5mm were axisymmetrically modelled for a series of finite element analyses. Five commercially available fixture models of which the diameter were 3.4, 3.8, 4.5, 5.5, and 6.5 mm, with the same length of 15mm, were analysed in order to investigate the influence of fixture diameters on the bone stresses. Main consideration was given to the stresses at the cortical bone around the implant fixtures where the acute stress concentration are likely to take place thereby eliciting the higher risk of bone resorption. The axisymmetric vertical load of 50N as well as the non-axisymmetric lateral load of 20N were taken into consideration as load conditions. The results of present study indicated that the stress at the cervical cortical bone increases rapidly as the diameter of implant fixture decreases. Virtually the same trends in the stress reduction phenomena were observed for both the load cases. Comparison of the normalized stresses indicated that for implants of larger diameters the stress reduction ratio was far greater than a simple arithmetic reduction in the stress due to the increased implant/bone contact area.