[The influence of the screw thread and the height of constraints on the stress distribution around dental implants by using three-dimensional finite element analysis].
OBJECTIVE
To study the influence of the screw thread and the height of constraints on the stress distribution of the implants.


METHODS
The three-dimensional emulational models of the implants with different screw-pitch were constructed by a CAD/CAM package. The Von Mises stress of the models was analyzed by three-dimensional finite element method.


RESULTS
The constraints of the long implant were high. When the constraint height reduced, the change of the stress value of the implants without screw thread was much less than that of the implants with screw thread. The difference of screw-pitch had little influence on the stress value and the stress concentration of the implants.


CONCLUSIONS
The strength requirement of screw implant was high. Stress distribution of the long dental implants was more reasonable than the other, which will contribute to the success of dental implants.
Biomaterials Research Laboratory, School of Materials Science and Engineering Shandong University, 250061 Jinnan, China.
Dong-ke
DK
Liang
Jian-hua
JH
Wang
Quan-sheng
QS
Ma
Yu-peng
YP
Lu
Rui-fu
RF
Zhu