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[Characteristics of stress distribution on bone adjacent to implants under three different loading directions]
Hong-chang Lai1, Zhi-yong Zhang, Bao-wei Zhang
1Center for Oral & Cranio-Maxillofacial Implantology, Ninth People's Hospital, Shanghai Second Medical University, Shanghai 200011, China. lhc9@hotmail.com
Objective:
To evaluate the stress distribution on bone adjacent to an implant under the vertical load, oblique load and horizontal load.
Methods:
Obtained three dimensional radiographic data of the jaw by dental CT scan. Based on the scanning sections, the three-dimensional finite element analysis mandible model was established. Loading vertical, oblique and horizontal forces on the implant, calculated the maximum stress, minimum stress and von mises stress.
Results:
The peak stress occurred at the cervical bone margin adjacent to the implants;the stress concentration under the vertical loading is easily concentrated than that of vertical loading.
Conclusion:
In the clinical designation,not only the force of bite but also the direction of the force should both be emphasised.