Evaluating the Dynamic Behavior of Taper Joint Implants Under Different Loading Conditions:A Transient Dynamic Finite Element Analysis

抄録

The purpose of this study was to investigate the influence oftaper angle on the dynamic behavior of the taper joint in a dental implant system under two different loading conditions using transient dynamic finite element analysis（FEA）. The taper joint dental implant model was prepared with seven different taper angles. The analysis was performed using three-dimensional FEA. To simulate an in vitro pull-out test, compressive loading was first applied to the dental implant systems as a preload, corresponding to the installation load. In addition, two types of pull-out load were applied: vertical tensile loading and rotational tensile loading. During the preload, in all taper angles, the movement oftooth direction increased with increasing preload force. And the movement decreased with increasing taper angles of abutment. On applying a pull-out load after preload, the resistances for both vertical and rotational tensile loads also decreased with increasing taper angle. For all taper angles, the movement increased with increasing load. This indicates that the connection force between the abutment and the implant decreases with increasing taper angle. Within the limits ofthe study, the relationship between the taper angle and the dynamic behavior of a taper joint abutment under two different pull-out loadings was clarified using transient dynamic FEA. Our results suggest that the taper angle significantly affects the dynamic behavior ofthe abutment in a taper joint implant. Therefore, dentists should take into consideration the characteristics ofthe taper angle when selecting the taper joint implant systems.