Effect Of Different Surface Design Of Super Short Implant (Long≤7mm) On Stress Distribution In Implant-Bone Interface

Objective:To investigate the effect of different length and surface design of super short implant(long<=7mm) on Stress distribution in implant-bone interface.Methods:Twenty three-dimensional finite element models of different length and surface design were created:V-shape spiral design, reverse buttress spiral design, buttress spiral design and fin formula no-spiral design to part created length equal 7.0mm,6.5mm, 6.0mm,5.5mm and 5.0mm models. The stress distribution and the maximum Von-Mises stress of all models were compared and analysised under axial and oblique loads.Results:Under axial load, the stress distribution of fin formula no-spiral design showed the most reasonable than all,6.5mm length reverse buttress,6.5mm length buttress and 6.0mm length reverse buttress in the spiral design showed better stress distribution than other spiral design models. Under oblique load, fin formula no-spiral design was the best than all models in same length,6.5mm length super short implant showed the best stress distribution and the minimum Maximum Von-Mises stress in same surface design.Conclusion:Fin formula no-spiral design is the optimal design in a super short implant. The stress distribution of reverse buttress showed the most reasonable in all spiral design models,and evade useV-shape spiral design; the length of spiral surface design super short implant should be least at 6mm, but the length of fin formula no-spiral design should be the smaller, even could be lower than 5.0mm.