[A three-dimensional finite element analysis of stress distribution in mandibular FPDs with different length pontics]

To investigate the stress distribution in the mandibular fixed partial denture (FPD) by changing the length of pontics.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.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.Damages may develop in the mandibular FDP, when the length of the pontic is longer than 3 times of normal length.