Five members over three upper implant restorations; different implant material, localization and abutment heights; evaluation of stress distribution on implant, abutment, restorations and environmental tissues with finite element stress analysis

Nowadays, implant-supported fixed or removable prostheses are frequently preferred in the treatment of conditions from single tooth deficiency to total tooth deficiency. In fixed implant prostheses, the incoming forces are shared directly between prosthetic restorations and through implants and then transmitted to the jaw bone. How much stress is transmitted to the restoration, implant and bone; the support depends on the number of implants, materials, localizations, abutments and restorative superstructures. In a partial edentulous case; by changing implant material, implant localization and abutment heights; observing the effects occurring in materials and surrounding tissues is an important guide in clinical practice. There fore, in our study; In the upper jaw posterior region, creating a modelless ending with five teeth deficiency, five members on three implant restorations; different implant material, different implant localization and abutment heights; finite elements of stress distribution on implant, abutment, restorations and surrounding tissues were evaluated by stress analysis method. In our study, 18 different models were obtained. Our implant localizations; it was created in three different localizations: 13-14-17, 13-15-17 and 13-16-17. As implant material; three different materials have been selected: titanium, zirconia and Cfr-PEEK. Our Abutment groups are divided into two groups with vertical height of 4 mm and 5.5 mm and titanium abutment on titanium implant, zirconia and Zirconia abutment on Cfr-PEEK implant were selected. The bridge prosthetics we have created are metal substructure porcelain in titanium implant, zirconia substructure porcelain used zirconia and Cfr-PEEK implant. According to the results we obtained in our study; differences occur in bone and implant stresses with the change of implant materials. As a result of the change of implant localization; differences were determined in bone, implant, abutment and stress on the bridge prosthesis. The change in the vertical height of the abutment material did not create a significant difference in stresses on bone tissue and materials. Keywords: Elastic modulus, finite element stress analysis method, abutment, titanium, zirconia, Cfr-PEEK