This study was conducted to test possibilities of application of 3D printed dental models (DMs) in terms of their accuracy and physical properties. In this work, stone models of mandibles were cast from alginate impressions of 10 patients and scanned in order to obtain 3D printed acrylic replicas. The diagnostic value was tested as matching of model scans on three levels: peak of cusps, occlusal surface, and all teeth surfaces. The mechanical properties of acrylic and stone samples, specifically the impact strength, shore D hardness, and flexural and compressive strength were investigated according to ISO standards. The matching of models’ surfaces was the highest on the level of peaks of cusps (average lack of deviations, 0.21 mm) and the lowest on the level of all teeth surfaces (average lack of deviations, 0.64 mm). Acrylic samples subjected to mechanical testing, as expected, showed higher mechanical properties as compared to the specimens made of dental stone. In the present study we demonstrated that 3D printed acrylic models could be ideal representatives in the case of use as a diagnostic tool and as a part of medical records. The acrylic samples exhibited not only higher mechanical properties, but also showed better accuracy comparing to dental stone.
Arrays of nanoscale cavities in the form of nanovolcanoes can act as traps for nanoparticles to obtain surfaces with the desired functionality. The nanoparticle trapping strategy is based on generating negative pressure inside the nanocavities and aspiration of nanoparticles from the suspension. A new approach has been proposed to prepare polymeric nanocavities and tune their geometry to increase trapping efficiency. The strategy uses microphase separation in a polymer blend and tuning the shape of polymer islands to use them as molds for nanovolcanoes by tuning the molecular weight distribution of the island phase. Tuning the silhouette of the nanovolcanoes made it possible to find a geometry that allows air storage. Hydroxyapatite nanoparticles were entrapped in the nanovolcanoes to show that cells will proliferate in the presence of nanovolcanoes with hydroxyapatite, while nanovolcanoes without hydroxyapatite will block proliferation.
Arrays of nanoscale cavities in the form of nanovolcanoes can act as traps for nanoparticles to obtain surfaces with the desired functionality. The nanoparticle trapping strategy is based on generating negative pressure inside the nanocavities and aspiration of nanoparticles from the suspension. A new approach has been proposed to prepare polymeric nanocavities and tune their geometry to increase trapping efficiency. The strategy uses microphase separation in a polymer blend and tuning the shape of polymer islands to use them as molds for nanovolcanoes by tuning the molecular weight distribution of the island phase. Tuning the silhouette of the nanovolcanoes made it possible to find a geometry that allows air storage. Hydroxyapatite nanoparticles were entrapped in the nanovolcanoes to show that cells will proliferate in the presence of nanovolcanoes with hydroxyapatite, while nanovolcanoes without hydroxyapatite will block proliferation.
Arrays of nanoscale cavities in the form of nanovolcanoes can act as traps for nanoparticles to obtain surfaces with the desired functionality. The nanoparticle trapping strategy is based on generating negative pressure inside the nanocavities and aspiration of nanoparticles from the suspension. A new approach has been proposed to prepare polymeric nanocavities and tune their geometry to increase trapping efficiency. The strategy uses microphase separation in a polymer blend and tuning the shape of polymer islands to use them as molds for nanovolcanoes by tuning the molecular weight distribution of the island phase. Tuning the silhouette of the nanovolcanoes made it possible to find a geometry that allows air storage. Hydroxyapatite nanoparticles were entrapped in the nanovolcanoes to show that cells will proliferate in the presence of nanovolcanoes with hydroxyapatite, while nanovolcanoes without hydroxyapatite will block proliferation.
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