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The Aim of the Study: Was to determine the possibility of calculating the parameters of the occlusal surface of fixed dentures., Materials and Methods: An analysis of dependence between the area of the occlusal surface and the area of the support structures (tooth root/implant), between the severity of the occlusal relief (tubercles of teeth) on the length of the root/implant was carried out., Results: The nearness of the Kurlandsky periodontal coefficients and Oksman masticatory coefficients with the calculated coefficients obtained on the basis of 3D analysis of the lateral teeth anatomy has been established. A method for calculating the maximum permissible vertical and lateral loads on chewing teeth is proposed., Conclusion: Recommendations are given on the design of the shape of the occlusal surface depending on the periodontal condition and the severity of the external thread of the implant.