[Biomechanics of implant retained fixed prosthesis in patient with edentulous upper jaw]. / Biomekhanika nes''emnogo proteza na implantatakh pri polnom otsutstvii zubov na verkhnei cheliusti.

The purpose of the study was to study the stress-strain state of bone tissue and a permanent prosthesis on implants installed in the frontal part of the upper jaw. The 150N load was applied to the frontal and 250N to the side of the non-removable prosthesis on six or four implants, including zygomatic and 'All-On-Four' technology. The values of stresses in bone tissue, implants and prosthesis are obtained, which show a large margin of strength in structural materials. At the same time, the bone strength is low, especially around the zygomatic implants and the extreme implants 'All-on-4' with the load of the lateral part of the prosthesis.