Comparative assessment of physical and mechanical indicators of packing materials of complete removable dentures

Abstract

Successful dental rehabilitation of a patient with complete removable dentures depends not only on a number of features of the selected design and clinical conditions of the patient's prosthetic area. Also on the manufacturing technology of the materials used for its manufacture. The purpose of our study was a comparative assessment of the physical and mechanical properties of doped packing materials for removable denture structures using an improved method. An alloyed packing material based on gypsum and supergypsum, modified with nitrile rubber latexes and organosilicon emulsion, was developed. The selected modifiers differ in their structure, group polarity and lyophilicity. The comparative analysis of the quality of auxiliary dental materials included a generalization of the results of a laboratory study of the physical and mechanical properties of various types of plaster. In the system of qualitative assessment of plasters, the indicative properties of auxiliary materials were investigated: "ORTHOGYPS", "Gypsum highness type 10", "Base Stone", provided by ISO 6873, which are divided by us into technological (defining features of the material packaging process) and physical and mechanical (total working time, structuring time, relative expansion during structuring, relative expansion after structuring, compressive strength, linear shrinkage). As a result, it was determined that the developed modified components of the alloy packing material, in turn, provided acceptable accuracy of the base of the removable dentures, which corresponded to the working model due to the improvement of the physical and mechanical properties of the packing material and, as a result, improved manufacturability of removable orthopedic structures of dental prostheses.

Keywords: orthopedic treatment, physical and mechanical properties, complete removable dentures, modifier, gypsum mixture.