[A three-dimensional finite element analysis of stress distribution in mandibular FPDs with different length pontics].
OBJECTIVE
To investigate the stress distribution in the mandibular fixed partial denture (FPD) by changing the length of pontics.


METHODS
Based on a 3-DFE model of the mandibular FPD, we analyzed the stress distribution in the mandibular FPDs by loading the same level force at pontics with different lengths that were 2 to 4 times of normal length.


RESULTS
The distribution trends of the stresses in the mandibular FPDs with differently elongated pontics were similar, but the highest von Mises stress in the bridge was enlarged.


CONCLUSIONS
Damages may develop in the mandibular FDP, when the length of the pontic is longer than 3 times of normal length.
Yan
Li-jin
LJ
Department of Stomatology, General Hospital of PLA, Beijing 100853, China.
Liu
Hong-chen
HC
Bai
Lu
L
Wang
Yan-rong
YR
D003799:Dental Stress Analysis; D003830:Denture, Partial, Fixed; D020342:Finite Element Analysis; D006801:Humans; D008334:Mandible