[Three-dimensional finite element analyses of bone surface stress of two kinds of conjunction implant].
OBJECTIVE
To establish a three-dimension finite element model of mandible with two kinds of dental implant and to study the stress of implant-bone interface.


METHODS
Measuring the data of the components of the dental implant and using spiral CT image reconstruction technique to scan the cross section of the mandible. Three-dimension finite element analysis software Unigraphics and MSC. Marc/Mentat were used to build the conjunction model and bone model of two implant systems. Loading 200 N axially and 100 N 30 degrees obliquely on the models respectively, the stress distribution patterns of the bone interface of two implant systems were analyzed.


RESULTS
The stress distribution on the bone interface of two implant systems was similar. The peak stress of oblique loading was higher than that of axial loading. The peak stress district of the bone was concentrated on the stricture of the implant cervix, which was more obviously displayed on the Replace Select implant. The peak stresses on the bone interface of Replace Select implant were higher than that of Replace implant in all loadings.


CONCLUSIONS
To Replace Select especially, oblique force should be avoided in clinical practice in case of the bone absorption.
Lan
Jing
J
Center of Implantology, School of Stomatology, Shandong University, Jinan 250012, China.
Xu
Xin
X
Jiang
Guang-shui
GS
Guan
Yan-jin
YJ
Huang
Hai-yun
HY
Lan
Jing
J
D003198:Computer Simulation; D015921:Dental Implants; D020342:Finite Element Analysis; D006801:Humans; D008334:Mandible; D013314:Stress, Mechanical
D015921:Dental Implants