A Study Case of Short Dental Implants Loading in the All-On-4? System on Fixed Dental Prostheses: A Finite Element Analysis

The biomechanical research about toothless man-dible with four dental implants and a prosthetic system re-search, which shows the influence of the cantilever length of prosthesis on the weakest structural elements and the load changes in peri-implant bone by changing symmetrically position of the dental implants (in relation to each other), diameters and lengths, and orientation (in relation to chew-ing surfaces), is not discussed widely in the scientific litera-ture. On the other hand, the use of short implants is more common in practice. Some of these implants are only 8 mm in length.The odontologists, implantologists and dental tech-nician can use results received by finite element method (FEM) in the daily clinical practice in order to reduce the potential for mechanical / technological and consequent bi-ological complications already at the planning stage of the treatment, and thus determine best outcomes in the treat-ment of toothless patients.With a unique interpretation of the results obtained by FEM, the paper discusses the results of implants (8 mm in length with 3.5 mm and 4.5 mm diameter) loading, when the cantilevered dental prostheses are loaded in different po-sitions, as well as implant positions are changed.The research determined the dependence of load-ing 8 mm length implants in the All-on-4 (R) system on their position in the jaw, the tilting angle, and the position of the occlusive load application to the prosthesis with the cantile-ver.