Three Dimensional Finite Element Analysis for Immediate Crestal Versus Basal Implant in Central Incisor Region of Maxillary Bone

A Comparative Study

Abstract

The immediate loading of dental implants is currently one of the most frequently used protocols in esthetic zone. It has also been documented that maxillary central incisor single-tooth replacement is often the most difficult procedure to perform in implant dentistry. Crestal and basal implants are endosseous aids to create osseointegrated points of retention for immediately loaded prosthesis. They are not only differentiated by the way they are inserted but also by the way the forces are transmitted. Finite element analysis has become a useful tool for predicting stress on implants and its surrounding bone.

Material and Methodology: The digital image of maxilla of patient with missing central incisor was scanned and plotted and transferred to the computer from where Finite element analysis model (using ANSYS software) was created, in which crestal and basal implant with the superstructure was placed. Load was applied on to it and Von Mises stresses for both the implants system were evaluated.

Result: The results demonstrated on comparison of the Immediately loaded crestal and basal implant when maxillary central incisor is missing. Von Mises stresses(MPa) in crestal implant(189.733MPa,64.212MPa, 6.637 MPa) less stress concentration around the implant, cortical bone, and cancellous bone than the basal implant(186.381 MPa, 215.807MPa, 7.737 MPa) when the immediate loading condition.

Conclusion: Within the limitations of this finite element analysis study, immediately loaded basal implant shows more stress crestal implant.