[Comparative evaluation of the tiled abutment teeth restored with or without fixed bridge on stress distribution by anisotropic finite element method].
OBJECTIVE
To compare the tilted abutment teeth restored with or without fixed bridge on stress distribution by anisotropic finite element method when the vertical and the oblique loads are simulated.


METHODS
Three-dimensional finite element model was constructed by using SCT image reconstruction technique, self-programming and ANSYS software with the anisotropic elasticity data. The static loads were simulated according to the restored and unrestored situation. The stress distribution and stress level of the second molar was recorded.


RESULTS
When the vertical static load was simulated, the stress distribution of the tilted abutment teeth was much improved. Tensile stresses appeared dominantly on the mesial apex of the second molar (31.0 Mpa) before restoration and on the distal apex of the second molar (20.2 Mpa) after restoration. When the oblique load was simulated, the stress distribution changed a little.


CONCLUSIONS
The stress distribution of the tilted abutment can be improved by restorative techniques with the use of fixed bridge; however, the clinician should lower the height of the cusp to reduce the oblique load of the abutment.
Lin
Ying-He
YH
West China School of Stomatology, Sichuan University, Chengdu 610041, China.
Man
Yi
Y
Gong
Ping
P
Guan
Dong-Hua
DH
Qu
Yi-Li
YL
Lu
Xuan
X
D000328:Adult; D016880:Anisotropy; D003198:Computer Simulation; D000044:Dental Abutments; D003793:Dental Restoration, Permanent / Q000379:methods*; D003829:Denture, Partial; D020342:Finite Element Analysis; D006801:Humans; D008297:Male; D013314:Stress, Mechanical; D014070:Tooth / Q000601:surgery*