Abstract: In order to supply a mechanics basis of the best design of a clinical protection for planting basic abutment, the paper studies, calculates, compares the structures, and handles various connecting modes by using the sliding friction element. In doing so, we have used the computer to make a three-dimensional graph structure and a boundary treatment, and applies a three-dimensional finite element method to analyze the stress field and the displacement field of the combining supported prostheses under a load in four different connecting modes.

Key words: computer graph construction, three-dimensional finite element, Branemark implanted prostheses, stress analysis