Results of clinical evaluation of the quality of temporary orthopedic structures made using digital and traditional technologies

Vоkulova Julia Andreevna, Zhulev Evgeny Nikolaevich

Aim – conduct a clinical assessment of the quality of temporary orthopedic structures made using digital and traditional technologies. Patients were divided into three groups according to the method of manufacturing temporary fixed prostheses – from Protemp 4 composite material using a silicone key, using the KaVo ARCTIC CAD/CAM system from Vita CAD-Temp multicolor polymethylmethacrylate, and using the Asiga Max UV 3D printer from the biologically compatible NextDent C&B MFH material. Clinical evaluation of prosthetic devices was performed based on the criteria of the modified USPHS test. The exact Fischer test was used for statistical analysis of the results obtained. Statistically significant differences (p<0.00417) between traditional and digital methods of manufacturing temporary orthopedic structures during clinical evaluation based on a modified USPHS test were found for the following criteria: color matching, surface quality, the need to correct inter-occlusal relationships, and the quality of interproximal contacts. The results obtained allow us to conclude that the technologies of intraoral laser scanning, computer modeling and automated production using a milling and grinding machine and a 3D printer make it possible to obtain temporary orthopedic structures with dense interdental contact points and pre-verified inter-occlusal relationships using a virtual articulator, which is quite difficult to obtain using the traditional method of manufacturing medical prostheses using a silicone key. According to the "Color matching" criterion, statistical differences were found when comparing the subtractive and clinical methods of manufacturing artificial crowns (p<0.00139), but no statistical differences were found when comparing the additive method with the clinical and subtractive methods.

Keywords:digital technologies in dentistry, digital impressions, CAD/CAM, intraoral scanner, 3D printing, temporary crown.