A Comparison of Four Implant Abutment Connection Designs on the Stress Distribution Pattern using 3D Finite Element Analysis
Kamalakanth Shenoy, Hasan Sarfaraz, Akhter Hussain, P Sucheta
Citation Information :
Shenoy K, Sarfaraz H, Hussain A, Sucheta P. A Comparison of Four Implant Abutment Connection Designs on the Stress Distribution Pattern using 3D Finite Element Analysis. Int J Oral Implantol Clin Res 2015; 6 (1):1-8.
The aim of this study was to evaluate the influence of four diffe rent implant abutment connection designs on the amount of stress dissipated on the implant, abutment screw, implant abut ment interface and the bone when subjected to various loading conditions
Computer aided design models of four different implant abut ment connections, were constructed using Pro-Engineer 05. The 3D models were meshed using Hymermesh 11. Static load vertical loads 100 N were applied along the long axis of the implant at the central fossa and on the tip of buccal cusp. An oblique load was applied on the tip of the buccal cusp. This mesh was imported into ANSYS 13 to perform the numerical simulation.
The result showed that vertical loads closer to the implant long axis produced much lower Von Mises stresses than when loads applied away to the long axis of implant. The two types of conical connections dissipated the least amount of stress to the surrounding bone and most of the stresses were recorded at the implant abutment interface of these connections. The parallel hex connection showed a great amount of stress being dissipated to the abutment screw on vertical loading and most of these stresses were located at the 1st thread of the implant.
Conclusion: All the four implant abutment designs studied showed the least amount of stress on the various areas of the assembly and the surrounding bone, when the loads applied were close to the long axis of the implant. Both the conical connections proved to be the most favorable connections, and the parallel hex connection was the least favorable design. The tri-channel cylindrical connection design was stable on loads applied along and closer to the implant axis, but produced high amount of stress on the bone on oblique loads applied at a distance from the long axis of the impla
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