Abstract—A numerical and experimental study of the new method for determining the adhesive bond strength of fiber posts, called by the authors the "torque-out" test, is considered. In contrast to the known methods of testing the push-out test and the pull-out test, in which a tensile or compressive load is applied to the sample, the load is produced by the torque. Samples for determining the adhesive strength of a particular post-cement combination can be made in a clinical setting without using of special equipment. Testing of samples is carried out on a compact installation developed by the authors, designed to evaluate the adhesive strength of a joint in clinical conditions according to the magnitude of the limiting torque. The numerical study of the adhesive strength of the connection of fiber posts and luting cements and the comparison of the stress-strain state arising in the samples during the push-out and torque-out tests is performed using mathematical modeling such as the finite element method.