| Summary: | After implant insertion, the functional loads enhance the integration between the implant and bone tissue. Analysis of load transfer in various stages of implantation is performed considering different types of contact conditions between implant and bone. An FE model of a threaded dental implant subjected to a buccolingual load of 100 N is developed. Different types of interface conditions, namely, frictionless, frictional, rough, and bonded are assessed to analyze peak stress and micromotions of implant and surrounding bones in different implantation stages. It is found that peak stress in implant, cortical bone, and cancellous bone decreases about 3%, 13%, and 29%, respectively, through the growth of friction coefficient from 0.05 to 0.7. Moreover, the maximum peak stress in implant and bones occurs in the frictionless type of contact. In this case, the force merely passes through under-pressure surfaces; therefore, it leads to intense stresses. The outcomes show that peak stress in cancellous bone is more sensitive to interface conditions than that in implant and cortical bone, so that its magnitude decreases approximately 68% by the change of contact condition from frictionless to bonded.
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