COMPARATIVE ASSESSMENT OF CLINICAL AND TECHNOLOGICAL PROPERTIES OF ASHLESS ACRYLIC PLASTICS

Abstract

The aim of this study was to conduct a comparative evaluation of the clinical and technological properties of the proposed domestic ashless acrylic plastic. Materials and methods. In collaboration with colleagues from the accredited research laboratory of dental materials of the Stoma company in Kharkiv, Ukraine, we conducted a comprehensive comparative analysis of ashless cold-cured plastics. The study included the assessment of both clinical and technical characteristics, including structuring temperature, mixing time, curing time, consistency, and viscosity. o gather laboratory data, various dental materials were used: "Modeplast" (Stoma JSC, Ukraine), "Pi-Ku-Plast" (Bredent, Germany), "Cerin" (Spofa Dental, Czech Republic), and "Txowax" (Yeti Dental, Germany). We measured the properties on 125 samples (25 from each material) according to the method of use provided by the international standard ISO 10139-2018. Results. The study has revealed that the Modeplast material, manufactured by Stoma, exhibits a lower structuring temperature, specifically 2.3°C lower than Pi-Ku-Plast (Bredent), 1.2°C lower than Cerin (Spofa Dental), and 0.7°C lower than Txowax (Yeti Dental). Furthermore, the mixing time for Modeplast was notably shorter, being 7.5 seconds faster than Pi-Ku-Plast (Bredent), 1.5 seconds faster than Cerin (Spofa Dental), and 5.2 seconds faster than Txowax (Yeti Dental). In terms of hardening, Modeplast demonstrated the highest level of hardening compared to materials from other manufacturers. The consistency of Modeplast was stronger and harder, 1.5 mm harder than Pi-Ku-Plast (Bredent) demonstrated, 3.3 mm harder than Cerin (Spofa Dental) had and 1.7 mm harder than Txowax (Yeti Dental) showed. In terms of viscosity, Modeplast met the ISO-10139 standards, although it was 1.8 kJ/cm² lower in viscosity than Pi-Ku-Plast (Bredent) and 1.1 kJ/cm² lower in viscosity than Cerin (Spofa Dental). However, it was 0.2 kJ/cm² more viscous than Txowax (Yeti Dental). The kneading time for Modeplast was notably shorter, indicating higher efficiency in usage. Regarding the curing process, Modeplast exhibited superior performance, proving to be faster than other materials. The consistency of Modeplast was characterized by increased strength and hardness when compared to its counterparts. In the aspect of viscosity, Modeplast adhered to ISO-10139 standards and demonstrated satisfactory performance, albeit with some distinctions from other materials. Conclusion. Thus, our studies has demonstrated that Modeplast possesses superior technical characteristics, making it a compelling factor in the selection of dental materials for various components.