Rocco Caccavale
Mechanical characterisation of dental crown restoration materials subjected to artificial ageing through nanoindentation tests.
Rel. Gianpaolo Serino, Cristina Bignardi, Nicola Scotti. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Biomedica, 2025
Abstract
Nowadays, in the field of dental prosthetics, numerous solutions can be adopted in terms of implant design, and it is of fundamental importance to be aware of their mechanical properties in order to assess their clinical reliability. In the present study, a characterisation of the mechanical properties of different dental resins was carried out, including ceramic-polymeric hybrid, 3D-printed, flowable and ceramic materials. Nanoindentation tests were performed before and after artificial ageing processes (to which all samples were subjected). Ceramic materials were sintered separately at 1500, 1550 and 1600°C, in two different furnaces, individually or in groups and the influence of these parameters were mechanically characterised.
Five different null-hypotheses were then advanced to evaluate the obtained results: • Mechanical parameters do not change between pre and post treatment; • Parameters do not change depending on the type of sintering oven used; • Parameter do not change by sintering several samples together or a single one; • Parameters do not change with sintering temperature; • There is no difference between 3D printed resins and CAD/CAM resins
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