Stress and strain analysis of the bone-implant interface: A comparison of fiber reinforced composite and titanium implants utilizing 3D finite element study

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This study analyzed stress and strain mediated by two different implant materials, titanium (Ti) and experimental fiber reinforced composite (FRC) on the implant and on the bone tissue surrounding the implant. 3D finite element models constructed from a mandibular bone and an implant were subjected to a load of 50 N in vertical and horizontal directions. Maximum stress concentrations were located around the implant on the rim of the cortical bone in implants materials, Ti and overall stresses decreased toward the Ti implant apex. In the FRC implant, a stress value of 0.6-2.0 MPa was detected not only on the screw threads, but also on the implant surface between the threads. Clear differences were observed in the strain distribution between the materials.The vertical load stress range of the FRC implant was close to the stress level for optimal bone growth. Furthermore, the stress at the bone around the FRC implant was more evenly distributed than that with Ti implant.