Effect of internal and external porous structure design on stress distribution of implant bridge: A Finite element analysis

摘要

In this paper, three different types of solid implant bridge (SIB), internal porous implant bridge (IPIB) and external porous implant bridge (EPIB) were modeled to investigate its static mechanical performance. FEA was used to calculate the stress distribution in implant bridges. The 200 N loading was applied to simulate occlusal function. The stress distribution occurred at the gingival surface above the interface in all the groups. The peak stress of IPIB was lower than SIB and EPIB. Further, two porous cylinders with external and internal pore structure were precisely fabricated to better understand its structural responses, stress distribution patterns and micromotions. Results showed that the peak stress and total deformation of internal porous cylinder was much lower than external porous cylinder. This study indicated that IPIB design maintained the better geometric characteristics and exhibited better stress distribution than EPIB design.