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.
Conclusion: Damages may develop in the mandibular FDP, when the length of the pontic is longer than 3 times of normal length.
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