GLASS MOSTLY FOR FILLERS OF COMPOSITE DENTAL MATERIALS Russian patent published in 2023 - IPC C03C3/85 C03C3/64 C03C3/93 A61K6/77 

FIELD: dentistry.

SUBSTANCE: invention relates to a composition of radiopaque glass, which can be used in dentistry as fillers in filling and other composite dental materials. A glass composition was developed, including, wt.%: SiO₂ 36-44; Al₂O₃ 25-35; SrO 20-30; В₂О₃ 1-10; K₂O 0,5-5; ZrO₂ 1-4; TiO₂ 1-3, and SrO+ZrO₂+TiO₂ > 22 wt.%. The radiopacity of the glasses is 360–410 (atλ = 2.05 Å), transmission in the wavelength range of 300–500 nm 80–92%, chemical resistance is class 1, melting temperature is 1,500°C.

EFFECT: reduction of the melting temperature and increasing the radiopacity of the glass.

1 cl, 1 tbl