In the present paper, the recent trends and developments regarding the manufacturing of hip-joint prosthesis replacements in treating post-traumatic and generative dystrophic joint diseases are reviewed, with the aim in mind of providing useful information for the manufacturing and biomedical researchers and engineers.

In the present paper reported is the manufacturing of ceramic spherical implants for medical purposes by employing diamond-abrasive lapping techniques. The technological parameters of this technique and a theoretical model experimentally verified are presented. A novel method of control of the free lapping process is suggested, resulting, as indicated by the experimental and theoretical results, in a decrease of time requested for the coordination of the profiles of the tool and the workpiece and in an increase of the process efficiency when manufacturing precision work surfaces.

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This paper presents the results of the tests performed during the grinding process of the ceramic materials: – polycrystalline ceramics (Zirconium ZrO2) and mono-crystalline ceramics (sapphire α-Al2O3) by the diamond tools. Studies have shown that the concentration (thickening) of the tool composite changes the tool's pore structure when using suitable wetted adamantine additives. Such modified composite has positive impact on tribological properties of the subsurface layer of the machined components. This is manifested by the reduction of the surface roughness and reduction of the vibration amplitude of the coefficient of friction. The possibilities of the positive effects when using wetted additives on the tool's composite during the pressing (briquetting) stage confirm the study results.

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