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The liner is one of the most important part of the lower limb protheses, whose role is to maintain the contact between the residual limb and the socket. Taking into account the residual limb has a variable volume, we have analysed the closed-cell prototype of the liner made of silicon rubber RTV-2. The mechanical properties of this material could provide the requirements imposed for the lower limb prostheses. Meantime it is innocuous for the human body, especially for skin contact and could be used for medical devices manufacturing.

The article presents the results of the experimental research on the wear of gearwheels manufactured by an additive technology. It was realized eight gearwheels with the same module and number of teeth by means fused deposition modelling technology from different materials, including PLA, ABS, CarbonFil, nylon. In order to determine the teeth wear, pitting, thinning of teeth at the base in a gear that requires a continuous and constant operation, a demonstration set-up was designed and realized to highlight the mechanical loads of the eight gearwheels made by additive technologies.

The paper presents the behaviour of dental models subjected to mechanical loads. Maxillary dental arcade was obtained by additive technologies – fused deposition modelling and digital light processing. Also, it were used different materials - ABS, CarbonFil, biocompatible ABS, photopolymeric resin and the dental prototypes were tested in two areas - molar and central incisor zones with a transducer force HV 500. The experimental results highlighted the behaviour of the dental models realized by additive technologies in order to determine the maximum compressive force and maximum deformation of the maxillary in function of the material and the technology used.