Yosef Wakjira
Student, National Taiwan University of Science and Technology.
Title: The Optimum Stress Distribution Under Different Implant Thread types and Osseointegration Conditions: A Finite Element Analysis
Biography
Biography: Yosef Wakjira
Abstract
The selection of optimum implant thread design plays a crucial role in the treatment. This study was undertaken to (i) Identify an optimum thread-shape design (ii) investigate the effects of various implant thread designs on stress distribution inside the bone implant-interface. (iii) Investigating Static, dynamic and fatigue behaviors of implants. Through FEA, Five implants with different thread shape designs were considered. The dimensions of implants were according to mechanical standards of commercial dental implant thread design. The implant modeling was done with the CATIA software & simulated in Abaqus software. Vertical loads of 150N were applied. The three dimensional model of bone is taken using Cone Beam Computerized Tomography (CBCT) and considered as Anisotropic and Osseo integration were simulated at various degrees. The FEA results demonstrated Von Mises stresses were more distributed in the mesiodistal direction. Maximum stresses were concentrated at the cortical bone and transferred to the first thread of the implant. Minimum Von Mises stresses were observed with Square thread design at the cortical bone. The Simulation shows that the least stresses were observed at the cancellous bone and maximum at the implant. The use of different thread designs and various osseointegration conditions did not affect the stress distribution patterns in the supporting bone. Buttress threads showed the most favorable results according to the predicted values of von Mises equivalent stress, pressure, different shear stresses, and micromotion.