A key factor for success of a dental implant is the manner in which stresses are transferred to the surrounding bone. Strength of bone is directly related to its density. Maximum stresses are reported to be incurred by the crestal cortical bone surrounding the implant. Displacement of implants is significantly higher in soft cancellous bone than in dense bone. It’s common to have implants being placed in different bone densities supporting fixed dental prostheses. This study was aimed at assessing stress and deformation generated by osseointegrated implants placed in bone of different densities on a cemented fixed prosthesis when subjected to static and dynamic loading. A 3-D finite element analysis was done on a CAD (Computer Aided Designing) model simulating maxillary bone segment with two different bone densities (D2 and D4). The effect of loading was evaluated at implant – bone interface, implant-abutment interface, abutment, implant abutment connecting screw, cementing medium and the fixed prosthesis. Stresses were calculated using von Mises criteria calibrated in MPa and deformation in millimetre. These were represented in color coded maps from blue to red (showing minimum to maximum stress/deformation), depicted as contour lines with different colors connecting stress/deformation points.The study concluded, von Mises stress to be more in D2 than D4 bone and in D2 bone the component with higher stress to be the implant.Deformation was noted more in D4 than D2 bone and in D4 bone the abutment-prosthesis interface showed more deformation.
Three Dimensional Finite Element Analysis Of Osseointegrated Implants Placed In Bone Of Different Densities With Cemented Fixed Prosthetic Restoration
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Kasthuri Chidambaravalli, Vinod Krishnan; Three Dimensional Finite Element Analysis Of Osseointegrated Implants Placed In Bone Of Different Densities With Cemented Fixed Prosthetic Restoration. J Oral Implantol doi: https://doi.org/10.1563/aaid-joi-D-19-00144
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