Studying abrasive wear of materials for direct and indirect restorations with increased dental abrasion

Strength characteristics of restoration materials, namely their resistance to abrasive wear, are of great importance in choosing a treatment method for increased dental abrasion. The purpose of this study was to research the abrasive wear of materials for direct and indirect dental restorations in patients with increased dental abrasion by measuring areas of the teeth occlusion using computer occlusiograms. Patients who underwent direct restorations with nanocomposite and indirect restorations with lithium disilicate ceramic restorations as a treatment for increased dental abrasion were underwent occlusiography by using TScan III (Tekscan, USA) 1 month and 24 months after the treatment was completed, to measure the area of teeth occlusion in the IP position (a multi-point occlusal contact position). The degree of dental abrasion of restoration materials provided judging on changing the area of occlusal contacts in the same patient over time and in compared with the area of occlusal contacts in the control group. The results of the study shown that the resistance to abrasive wear of ceramic restorations is in consistent with a tooth enamel, and nanocomposite materials, despite their durability, are prone to abrasion as well. Therefore, indirect ceramic restorations should be in preference in treatment of increased dental abrasion, in which an increased occlusive load is one of the clinical manifestations