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MONITORING OF CHANGES IN PHYSICOCHEMICAL AND CLINICAL CHARACTERISTICS OF THE DENTAL POLYMER MATERIALS USED IN ADDITIVE MANUFACTURING OF DENTAL PROSTHESES.

Georgian Medical News 2018 December
The use of additive technologies in dentistry is a promising trend; however, the physical and mechanical properties of the materials intended for the fabrication of long-term fixed restorations remain understudied. The aim of this research is to determine the feasibility of the use of long-term fixed provisional restorations made of polymer materials, fabricated using 3D printing. The conformance of the physical and mechanical properties of NextDent C&B Micro Filled Hybrid (ND) and Detax Freeprint temp UV (DX) materials to ISO 1567:1999 standard, stability of their physical and mechanical properties under the conditions of accelerated aging, as well as their resistance to the oral cavity environment were studied. As a result of the performed studies, the DX material turned out to be superior to ND with respect to most characteristics. Clinical observations were conducted on the treatment of chronic generalized periodontitis using the following fixed provisional splints made of various materials: DX, fabricated according to the Slide-And-Separate technology, splints fabricated using the CAD/CAM technology, and adhesive splints reinforced with a GlasSpan fiberglass thread. As a result of the analysis of the OHI-S and PI indices values, the absence of any statistically significant difference between the above-describe treatment methods was determined. The studied materials conform to the requirements of ISO 1567:1999; the materials exhibited different stability under the conditions of accelerated aging, nevertheless, they can be utilized for the fabrication of long-term fixed provisional restorations.

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